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SCI和EI收录∣中国化工学会会刊
本期目录
2007年 第15卷 第4期 刊出日期:2007-08-28
    SEPARATION SCIENCE & ENGINEERING
    苯或甲苯萃取己内酰胺和甲基己内酰胺分配系数的测定和预测
    龚行楚, 吕阳成, 骆广生
    . 2007, 15(4):  463-467.  doi:
    摘要 ( )   PDF (231KB) ( )  
    参考文献 | 相关文章 | 多维度评价
    To get high purity caprolactam is a challenging task in the chemical fiber industry. To
    date, reports on the prediction of the distribution of caprolactam and its derivative
    chemicals have been few. In this study, the extraction of caprolactam with toluene as the
    extractant and N-methyl caprolactam with benzene and toluene as the extractants has been
    carried out. By defining new UNIFAC groups and calibrating related interaction parameters,
    a UNIFAC method was introduced to predict the equilibrium concentration of caprolactam and
    methyl caprolactam in toluene or benzene extraction processes. The calculated results fit
    very well with the experimental data. Using the UNIFAC model, the selectivity of
    extractants can be predicted.
    有机硅表面活性剂对水体中多环芳烃的浊点萃取研究
    姚炳佳, 杨立, 胡琼, Shigendo Akita
    . 2007, 15(4):  468-473.  doi:
    摘要 ( )   PDF (194KB) ( )  
    参考文献 | 相关文章 | 多维度评价
    Cloud point extraction (CPE) processes with two silicone surfactants, Dow Corning DC-190
    and DC-193, were studied as preconcentration and treatment for the water polluted by three
    trace polycyclic aromatic hydrocarbons (PAHs): anthracene, phenanthrene and pyrene. For all
    cases, the volumes of surfactant-rich phase obtained by two silicone surfactants were very
    small, i.e. a lower water content in the surfactant-rich phase was obtained. For example,
    less than 3% of the initial solution was obtained in a 1% (by mass) surfactant solution,
    which was much smaller than that of TX-114 in the same surfactant concentration. And TX-114
    is known as a high compact surfactant-rich phase among most nonionic surfactants, thus the
    comparison showed that an excellent enrichment was ensured in the analysis application by
    the CPE process with the silicone surfactants, and the lower water content obtained in the
    surfactant-rich phase is also important in the large scale water treatment. The influences
    of additives and phase separation methodology on the recovery of PAHs were discussed.
    Comparing with DC-193, DC-190 has a lower cloud point and a higher recovery (near 100%) of
    all the three PAHs in same surfactant con-centration, which was required for application as
    a preconcentration process prior to HPLC system. However the DC-190 solution is hard to be
    phase separated only by heating, whereas DC-193 has a relative higher phase sepa-rating
    speed by heating, but a high cloud point (around 360K) limits its application. Due to the
    phase separation by heating is the only method of CPE suitable to the large scale water
    treatment, the mixtures of two silicone surfac-tants solutions were investigated in this
    study. A solution containing 1% of mixed DC-190 and DC-193 (in the ratio of 90︰10) removed
    anthracene, phenanthrene and pyrene near 100% with a relative low cloud point and quick
    phase separating speed.
    微波辅助胶团提取甘草中的甘草酸和甘草甙
    孙晨, 谢渝春, 刘会洲
    . 2007, 15(4):  474-477.  doi:
    摘要 ( )   PDF (172KB) ( )  
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    The feasibility of employing non-ionic surfactant (Triton X-100) as an alternative and
    effective solvent for the microwave-assisted extraction of glycyrrhizic acid (GA) and
    liquiritin (LQ) from licorice root was studied. The optimal extraction parameters based on
    the microwave-assisted micellar extraction technique were determined. Under the optimal
    conditions, i.e. 5% (by volume) Triton X-100, microwave-assisted extraction for 3—5min at
    373K, the percentage extraction of active ingredients reached the highest value. The
    preconcentration factor for GA and LQ (about 13.5) and the extraction efficiency for these
    two ingredients approached 100% showed the coupling of microwave-assisted extraction and
    cloud-point extraction could be employed as a new and effective technique for the rapid
    extraction and preconcentration of pharmacologically active ingredients from medicinal
    plants such as licorice root without disturbing chromatographic analysis.
    充碳塑料管壳式增湿-去湿淡化装置及过程:模拟和实验研究
    成怀刚, 王世昌
    . 2007, 15(4):  478-485.  doi:
    摘要 ( )   PDF (292KB) ( )  
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    The modelling and experimental investigation of a thermally coupled humidification-
    dehumidification desalination process using a carbon-filled-polypropylene shell-tube column
    are presented. A heat/mass transfer model is established to study the correlation among
    productivity, thermal efficiency, physicochemical parameters (gas/liquid phase temperature,
    heat/mass transfer coefficient, Reynolds number etc.), and operating conditions (the
    temperature of feed water, the flow rates of external steam, feed water, and carrier air);
    at the same time, the effects of operating conditions on the productivity and thermal
    eficiency of the column are investigated both theoretically and experimentally, which
    indicate that the optimum flow rates of external steam, feed water, and carrier gas are
    0.18, 60, and 10kg•h-1, respectively, and the higher the feed water temperature (≤95℃)
    is, the greater the productivity and the thermal efficiency will be. Furthermore,
    performance comparison with the previous study shows that the condensate productivity of
    this carbon-filled-plastic column is not lower than that of the copper column, which
    demonstrates the practicability and feasibility of applying such a plastic column to the
    humidification-dehumidification desalination process.
    超声波解吸柠檬酸盐溶液中二氧化硫的研究
    薛娟琴, 孟令嫒, 沈彬彬, 杜士毅, 兰新哲
    . 2007, 15(4):  486-491.  doi:
    摘要 ( )   PDF (183KB) ( )  
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    Using a sonochemical reactor designed by the authors, the process of removing sulfur
    dioxide from citrate solution simulating the flue gas desulfurization was studied. The
    influence of ultrasonic frequency, ultrasonic power, reaction temperature, stirring speed,
    inert gases, initial concentration of sulfur dioxide and concentration of citrate on the
    efficiency of sulfur dioxide desorption, the stability of citrate solution and the
    concentration of sulfate radical was examined systematically. By comparing the desorption
    of sulfur dioxide with and without ultrasonification, it was concluded that (1) lower
    ultrasonic frequency results in a better degassing efficiency; (2) the use of ul-
    trasonification in desorbing sulfur dioxide from citrate solution improves the desorbing
    efficiency in some condi-tions, without changing the essence of chemical reactions; (3)
    sparging inert gas into the liquid can lower the vis-cosity of solution and the cavitating
    threshold, and raise the desorption efficiency. These results demonstrate a technical way
    for deep desorption of sulfur dioxide and provide the fundamental data for future
    industrial disposal of sulfur dioxide.
    TRANSPORT PHENOMENA & FLUID MECHANICS
    带波形板的汽水分离器的数值研究
    李嘉, 黄素逸, 王晓墨
    . 2007, 15(4):  492-498.  doi:
    摘要 ( )   PDF (364KB) ( )  
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    Droplet behavior in the wave-type flow channel is discussed, especially with the secondary
    droplet generation due to impingement of droplets on the wall considered. A numerical
    method is suggested to simulate the droplet behavior in the flow field. Calculations are
    compared with experimental data on the pressure drop and separating efficiency. Good
    agreement exists between the calculations and air-water experiments. The numerical method
    developed gives a reasonable description of the droplet deposition and secondary droplet
    generation, and it can be applied to predict the performance of wave-type vane separators.
    螺旋槽机械密封的改进设计
    周剑锋, 顾伯勤, 陈晔
    . 2007, 15(4):  499-506.  doi:
    摘要 ( )   PDF (500KB) ( )  
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    The coupling effect among the flow of fluid film, the frictional heat of fluid film and the
    thermal deformation of sealing rings is inherent in mechanical seals. The frictional heat
    transfer analysis was carried out to optimize the geometrical parameters of the sealing
    rings, such as the length, the inner radius and the outer radius. The geometrical
    parameters of spiral grooves, such as the spiral angle, the end radius, the groove depth,
    the ratio of the groove width to the weir width and the number of the grooves, were
    optimized by regarding the maximum bearing force of fluid film as the optimization
    objective with the coupling effect considered. The depth of spiral groove was designed to
    gradually increase from the end radius of spiral groove to the outer radius of end face in
    order to de-crease the weakening effect of thermal deformation on the hydrodynamic effect
    of spiral grooves. The end faces of sealing rings were machined to form a divergent gap at
    inner radius, and a parallel gap will form to reduce the leakage rate when the thermal
    deformation takes place. The improved spiral groove mechanical seal possesses good heat
    transfer performance and sealing ability.
    REACTION KINETICS, CATALYSIS AND……
    活性纳米金颗料在介孔分子筛SBA-15上的分散
    周丽绘, 胡军, 谢颂海, 刘洪来
    . 2007, 15(4):  507-511.  doi:
    摘要 ( )   PDF (447KB) ( )  
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    Chemical modification (CM) and deposition-precipitation (DP) methods were used for the
    dispersion of active Au nanoparticles on mesoporous silica materials in this work. XRD,
    TEM, N2 adsorption isotherms and UV-Vis absorption spectra were used to characterize in
    detail Au-SBA-15 materials prepared by the two methods. The analysis results showed that
    high loading (1.7%, by mass) and uniform Au nanoparticles (approximately 3 nm) were
    dispersed in the channels of mesoporous SBA-15 by the CM method. While for the DP method,
    most of Au nanoparticles with the size of 10—15nm were aggregated outside of the channels
    of SBA-15 and the actual loading of Au was only 0.38% (by mass).
    碳酸钠促进选择性非催化还原脱硝的动力学模型与模拟
    韩奎华, 路春美
    . 2007, 15(4):  512-519.  doi:
    摘要 ( )   PDF (485KB) ( )  
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    The detailed kinetic model of selective non-catalytic reduction (SNCR) of nitric oxide,
    including sodium species reactions, was developed on the basis of recent studies on thermal
    DeNOx mechanism, NOxOUT mechanism and promotion mechanism of Na2CO3. The model was
    validated by comparison with several experimental findings, thus providing an effective
    tool for the primary and promoted SNCR process simulation. Experimental and simulated
    results show part-per-million level of sodium carbonate enhances NO removal efficiency and
    extend the effective SNCR temperature range in comparison with use of a nitrogen agent
    alone. The kinetic modeling, sensitivity and rate-of-production analysis suggest that the
    performance improvement can be explained as homogeneous sodium species reactions producing
    more reactive OH radicals. The net result of sodium species reactions is conversion of H2O
    and inactive HO2 radicals into reactive OH radicals, i.e. H2O+HO2=3OH, which enhances the
    SNCR performance of nitrogen agents by mainly increasing the production rate of NH2
    radicals. Moreover, N2O and CO are eliminated diversely via the reactions Na+N2O=NaO+N2,
    NaO+CO=Na+CO2 and NaO2+CO=NaO+CO2, in the promoted SNCR process, especially in the NOxOUT
    process.
    负载金属氧化物分子筛催化氧化模拟汽油的脱硫研究
    陈兰菊, 郭绍辉, 赵地顺
    . 2007, 15(4):  520-523.  doi:
    摘要 ( )   PDF (162KB) ( )  
    参考文献 | 相关文章 | 多维度评价
    A simulated gasoline consisting of model sulfur compounds of thiophene (C4H4S) and 3-
    methythiophene (3-MC4H4S) dissolved in n-heptane was tested for the oxidative
    desulfurization in the hydrogen peroxide (H2O2) and formic acid oxidative system over metal
    oxide-loaded molecular sieve. The effects of the oxidative system, loaded metal oxides,
    phase transfer catalyst, the addition of olefin and aromatics on sulfur removal were
    investigated in details. The results showed that the sulfur removal rate of simulated
    gasoline in the H2O2/ formic acid system was higher than in other oxidative systems. The
    cerium oxide-loaded molecular sieve was found very active catalyst for oxidation of
    simulated gasoline in this system. The sulfur removal rates of C4H4S and 3-MC4H4S were
    enhanced when phase transfer catalyst (PTC) was added. However, the sulfur removal rate of
    simulated gasoline was reduced with the addition of olefin and aromatics.
    SYSTEM ENGINEERING
    基于主元分析和核密度估计的多变量统计过程监控及在工厂聚丙烯催化剂反应器的应用
    熊丽, 梁军, 钱积新
    . 2007, 15(4):  524-532.  doi:
    摘要 ( )   PDF (410KB) ( )  
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    Data-driven tools, such as principal component analysis (PCA) and independent component
    analysis (ICA) have been applied to different benchmarks as process monitoring methods. The
    difference between the two methods is that the components of PCA are still dependent while
    ICA has no orthogonality constraint and its latent variables are independent. Process
    monitoring with PCA often supposes that process data or principal components is Gaussian
    distribution. However, this kind of constraint cannot be satisfied by several practical
    processes. To extend the use of PCA, a nonparametric method is added to PCA to overcome the
    difficulty, and kernel density estimation (KDE) is rather a good choice. Though ICA is
    based on non-Gaussian distribution information, KDE can help in the close monitoring of the
    data. Methods, such as PCA, ICA, PCA with KDE (KPCA), and ICA with KDE (KICA), are
    demonstrated and compared by applying them to a practical industrial Spheripol craft
    polypropylene catalyzer reactor instead of a laboratory emulator.
    基于MLD模型的CSTR建模和控制
    杜静静, 宋春跃, 李平
    . 2007, 15(4):  533-538.  doi:
    摘要 ( )   PDF (271KB) ( )  
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    A novel control strategy for a continuous stirred tank reactor (CSTR) system, which has the
    typical characteristic of strongly pronounced nonlinearity, multiple operating points, and
    a wide operating range, is initiated from the point of hybrid systems. The proposed scheme
    makes full use of the modeling power of mixed logical dy-namical (MLD) systems to describe
    the highly nonlinear dynamics and multiple operating points in a unified framework as a
    hybrid system, and takes advantage of the good control quality of model predictive control
    (MPC) to design a controller. Thus, this approach avoids oscillation during switching
    between sub-systems, helps to relieve shaking in transition, and augments the stability
    robustness of the whole system, and finally achieves optimal (i.e. fast and smooth)
    transition between operating points. The simulation results demonstrate that the presented
    ap-proach has a satisfactory performance.
    基于Tent混沌优化的神经网络预测控制
    宋莹, 陈增强, 袁著祉
    . 2007, 15(4):  539-544.  doi:
    摘要 ( )   PDF (238KB) ( )  
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    With the unique ergodicity, irregularity, and special ability to avoid being trapped in
    local optima, chaos optimization has been a novel global optimization technique and has
    attracted considerable attention for application in various fields, such as nonlinear
    programming problems. In this article, a novel neural network nonlinear predic-tive control
    (NNPC) strategy based on the new Tent-map chaos optimization algorithm (TCOA) is presented.
    The feedforward neural network is used as the multi-step predictive model. In addition, the
    TCOA is applied to perform the nonlinear rolling optimization to enhance the convergence
    and accuracy in the NNPC. Simulation on a labora-tory-scale liquid-level system is given to
    illustrate the effectiveness of the proposed method.
    非均相催化丙稀聚合的建模与仿真
    刘兴高
    . 2007, 15(4):  545-553.  doi:
    摘要 ( )   PDF (275KB) ( )  
    参考文献 | 相关文章 | 多维度评价
    A novel mathematical model for single particle slurry propylene polymerization using
    heterogeneous Ziegler-Natta catalysts has been developed to describe the kinetic behavior,
    the molecular weight distribution, the monomer concentration, the degree of polymerization,
    the polydispersity index (PDI), etc. This model provides a more valid mathematical
    description by accounting for the monomer diffusion phenomena at two levels as multi-grain
    model counts, and obtains results that are more applicable to the conditions existing in
    most polymerizations of industrial interest. Considering that some models on the mesoscale
    phenomena are so complex that some existing modeling aspects have to be simplified or even
    neglected to make the model convenient for use in interesting engi-neering studies, it is
    very important to put some effort into determining what sort of numerical analysis works
    best for these problems. For this reason, special attention is paid to these studies to
    explore an efficient algorithm using adaptive grid-point spacing in a finite-difference
    technique to figure out more practical mass transport models and convection-diffusion
    models efficiently. The reasonable outcomes, as well as the significant computation time
    sav-ing, have been achieved, thereby displaying the advantage of this calculation method.
    基于混合建模技术的复合肥养分含量MIMO软测量模型
    傅永峰, 苏宏业, 褚健
    . 2007, 15(4):  554-559.  doi:
    摘要 ( )   PDF (186KB) ( )  
    参考文献 | 相关文章 | 多维度评价
    In compound fertilizer production, several quality variables need to be monitored and
    controlled simul-taneously. It is very difficult to measure these variables on-line by
    existing instruments and sensors. So, soft-sensor technique becomes an indispensable method
    to implement real-time quality control. In this article, a new model of multi-inputs multi
    -outputs (MIMO) soft-sensor, which is constructed based on hybrid modeling technique, is
    pro-posed for these interactional variables. Data-driven modeling method and simplified
    first principle modeling method are combined in this model. Data-driven modeling method
    based on limited memory partial least squares (LM-PLS) algorithm is used to build soft-
    senor models for some secondary variables; then, the simplified first prin-ciple model is
    used to compute three primary variables on line. The proposed model has been used in
    practical process; the results indicate that the proposed model is precise and efficient,
    and it is possible to realize on line quality control for compound fertilizer process.
    THERMODYNAMICS AND CHEMICAL……
    连接基团与尾链长度对阳离子Gemini表面活性剂与阴离子聚电解质复合物影响的分子动力学模拟
    徐毅, 冯剑, 尚亚卓, 刘洪来
    . 2007, 15(4):  560-565.  doi:
    摘要 ( )   PDF (379KB) ( )  
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    Interaction of anionic polyelectrolyte with cationic gemini surfactant has been
    investigated by coarse-grained molecular dynamics simulation. Polyelectrolyte facilitates
    the oppositely charged ionic surfactants to aggregate by suppressing the electrostatic
    repulsion between ionic head groups leading to the formation of micellar complex. With
    addition of surfactant, the conformation of polyion chain changes from stretched to random
    coiled to spherical, and at the same time more free micelles are formed by surfactants in
    mixtures. Increasing the length of spacer or tail chain in gemini surfactant will weaken
    its interaction with polyelectrolyte and simultaneously strengthen its tendency to self-
    assemble. The simulation results are consistent with experimental observations and reveal
    that the electrostatic interaction plays an important role in the interaction of
    polyelectrolyte with gemini sur-factant.
    BIOTECHNOLOGY & BIOENGINEERING
    甲基纤维素湿敏水凝胶中溶菌酶微球性质的体外评价
    林莹, 孙佳丽, 蒋国强, 昝佳, 丁富新
    . 2007, 15(4):  566-572.  doi:
    摘要 ( )   PDF (671KB) ( )  
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    Long-term injectable microspheres have some inherent disadvantages such as migration of
    micro-spheres from the original site and the burst effect. In order to avoid these
    problems, microsphere-loaded thermosen-sitive hydrogel system was designed and expected to
    achieve a zero-order release of biomolecular drugs in relative high initial drug loadings.
    Lysozyme, an antibacterial protein usually used to reduce prosthetic valve endocarditis,
    was selected as the model drug. Poly (DL-lactide-co-glycolide) (PLGA) microspheres,
    prepared by solvent evapo-ration method, were employed to encapsulate lysozyme and
    dispersed into thermosensitive pre-gel solution con-taining methylcellulose (MC),
    polyethylene glycol (PEG), sodium citrate (SC), and sodium alginate (SA). The mix-ture
    could act as a drug reservoir by performing sol-gel transition rapidly if the temperature
    was raised from room temperature to 37℃. The in vitro release results showed that the
    burst effect was avoided due to strengthening of diffusion resistance in the gel. The
    formulation was able to deliver lysozyme for over 30 days in a nearly zero-order release
    profile with a rate of 32.8μg•d-1 which exhibits its remarkable potential for effective
    application in long-term drug delivery.
    Rhodococcus sp. SHZ-1腈水合酶的诱导表达和稳定性研究
    王超, 张根林, 徐小琳, 李春
    . 2007, 15(4):  573-578.  doi:
    摘要 ( )   PDF (320KB) ( )  
    参考文献 | 相关文章 | 多维度评价
    Inducing expression and the reaction characteristic of nitrile hydratase (NHase) from
    Rhodococcus sp. SHZ-1 were investigated. The results showed that the expression of NHase
    was greatly enhanced with the coopera-tion of acrylonitrile and ammonium chloride as
    inducer in the medium and the specific activity of NHase was in-creased of 44%. Then the
    temperature, pH, concentration of acrylonitrile and acrylamide were evaluated, which af-
    fected the activity and reaction characteristic of NHase. It was found that the temperature
    and concentration of acrylamide were the most important factors for the catalyzation of
    NHase. The optimal catalysis temperature of NHase from Rhodococcus sp. SHZ-1 was 30℃, and
    the activation energy of the hydration of NHase was 90.2kJ∙mol-1 in the temperature range
    from 5℃ to 30℃. Km of NHase was 0.095mol∙L-1 using acrylonitrile (AN) as substrate, and
    NHase activity was inhibited seriously when acrylonitrile concentration was up to 40g∙L-1,
    the substrate inhibition constant Ki is 0.283mol∙L-1. Moreover, the NHase from Rhodococcus
    sp. SHZ-1 had very strong tolerance to acrylamide, in which the final concentration of
    acrylamide reached to 642g∙L-1 and the residual activity of NHase still maintained 8.6% of
    the initial enzyme activity.
    高含量β-胡萝卜素微胶囊干粉流动性的考察及其影响因素
    许新德, 姚善泾, 韩宁, 邵斌
    . 2007, 15(4):  579-585.  doi:
    摘要 ( )   PDF (578KB) ( )  
    参考文献 | 相关文章 | 多维度评价
    The flowability of five kinds of microencapsulation powders, with different β-carotene
    contents and by two alternative particle-forming technologies i.e. spray-drying and starch
    -catching beadlet technology, was meas-ured. The actual flow properties of the five powders
    were compared based on bin-flow test, and three flow indexes (Hausner ratio, repose angle
    and flow index) were measured. It was found that the repose angle is the most suitable
    index to reflect the flowability of these powders for the particle properties would not be
    altered due to compaction or tapping during the measuring process. Particle size and
    particle size distribution play most important roles in the flowability of these granular
    materials, which was also influenced by other factors like shape, surface texture, sur-face
    roughness, etc. Microcapsules with wall material of gelatin and a layer of modified starch
    absorbed on the sur-face showed excellent flowabilities and good mechanical properties, and
    they are favorable for tabletting to supply β-carotene.
    水蛭素聚乙二醇化及其体外抗凝活力分析
    秦海娜, 修志龙, 张代佳, 包永明, 李晓晖, 韩国柱
    . 2007, 15(4):  586-590.  doi:
    摘要 ( )   PDF (292KB) ( )  
    参考文献 | 相关文章 | 多维度评价
    Hirudin is the most anticoagulant drug found in nature, but its short serum half-life
    significantly inhibits its clinical application. The PEGylation of hirudin, the most
    promising anticoagulant drug, was performed in this paper. The optimal reaction conditions
    for PEGylated hirudin were investigated. When the PEGylation reaction was conducted under 4
    ℃ after 10h, in the borate buffer at pH 8.5, with the molar ratio 250︰1 of PEG to
    hirudin, a higher modification extent was achieved. Finally, the bioactivity of PEGylated
    hirudin was measured in vitro. Compared with unmodified hirudin, 26% of anti-thrombin
    activity was retained.
    曝气生物滤池处理石油采出水的动力学特性研究
    苏德林, 王建龙, 刘凯文, 周定
    . 2007, 15(4):  591-594.  doi:
    摘要 ( )   PDF (98KB) ( )  
    参考文献 | 相关文章 | 多维度评价
    The biological aerated filter (BAF) was used to treat the oil-field produced water. The
    removal effi-ciency for oil, COD, BOD and suspended solids (SS) was 76.3%—80.3%, 31.6%—
    57.9%, 86.3%—96.3% and 76.4%—82.7%, respectively when the hydraulic loading rates varied
    from 0.6m•h-1 to 1.4m•h-1. The greatest part of removal, for example more than 80% of COD
    removal, occurred on the top 100cm of the media in BAF. The ki-netic performance of BAF
    indicated that the relationship of BOD removal efficiency with the hydraulic loading rates
    in biological aerated filters could be described by cr/ci=1-exp(-2.44/L0.59). This
    equation could be used to predict the BOD removal efficiency at different hydraulic loading
    rates.
    PROCESS AND PRODUCT TECHNOLOGY
    以乙烯基吡咯烷酮为功能单体的金属配合印迹聚合物的制备及水相识别
    王学军, 许振良, 邴乃慈, 杨座国
    . 2007, 15(4):  595-599.  doi:
    摘要 ( )   PDF (250KB) ( )  
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    Using nickel(Ⅱ) acetate-2,2′-dipyridyl complex as template and N-vinyl-2-pyrrolidone
    (NVP) as coor-dinate functional monomer, a new kind of metal-complexing template
    molecularly imprinted polymer (MIP) was prepared. The results of equilibrium binding
    experiments in aqueous solution showed that the MIP had higher bind-ing capacity for
    nickel(Ⅱ)-2,2′-dipyridyl than the non-imprinted polymer with the same chemical
    composition. The influences of metal ions and pH of solution on the recognition performance
    of MIP were investigated. The binding characteristics of MIP were evaluated by the
    Scatchard analysis with one-site and two-site binding equations, re-spectively. The results
    on substrate selectivity of imprinted polymer revealed that MIP had better binding affinity
    for template among the tested compounds.
    一种新型四元阻垢剂的合成和性能研究
    张云霞, 吴季怀, 郝三存, 刘明华
    . 2007, 15(4):  600-605.  doi:
    摘要 ( )   PDF (412KB) ( )  
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    A novel quadripolymer scale inhibitor poly-maleic anhydride-acrylic acid-acrylamide-sodium
    methallyl sulfonate (PMAAS) was synthesized by solution polymerization with maleic
    anhydride (MA), acrylic acid (AA), acrylamide (AM), sodium methallyl sulfonate (SMAS), etc.
    IR spectrum shows that PMAAS contains carbonyl, hydroxyl, phosphatic and sulfonic acid
    group. SEM indicates that PMAAS blocks the normal growth of scale CaCO3 and CaSO4 crystals.
    The influences of PMAAS concentration, Ca2+ concentration, temperature and pH value of the
    system on the inhibition efficiency are investigated. The inhibition efficiency of PMAAS is
    superior to com-mercial inhibitors T-225 and XF-192.
    异丙基萘的分子间烷基转移及其在制备2,6-二异丙基萘中的应用
    田正华, 王沛, 赵桂利
    . 2007, 15(4):  606-610.  doi:
    摘要 ( )   PDF (149KB) ( )  
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    Isopropylation of naphthalene with propene resulted in a variety of isomers having
    different alkylation levels. The most important isomer is 2,6-DIPN, which is the precursor
    of important monomer 2,6-naphthalene di-carboxylic acid used for making liquid crystal
    polymers. In order to increase the yield of 2,6-DIPN, the intermo-lecular transalkylation
    with naphthalene was applied to the mixture of other DIPNs and PIPN to obtain MIPN en-
    riched product, which underwent isopropylation with propene to produce 2,6-DIPN in a higher
    yield. The experi-mental study showed that the preferable conditions for transalkylation
    were reaction temperature of 325℃, the mo-lar ratio of isopropyl group to naphthyl group
    (IP/N) of 0.8︰1—0.9︰1, reaction time of 4h and 5% of amorphous silica-alumina by mass.
    The conversions of DIPN and PIPN in its mixture were 62%—69% and 87%—88% respec-tively
    and the yield of MIPN was greater than 40%. The mixture of MIPN enriched product and
    recovered MIPN from rectification was subject to isopropylation with propene at 275℃ over
    a shape-selective catalyst to produce 2,6-DIPN in a yield up to 38%. A recycled process of
    recovered components was established, through one cycle the yield of 2,6-DIPN based on
    naphthalene may be 2.8 times higher than before, and the utilization ratio of raw naph-
    thalene was increased by 46%.
    RESEARCH NOTES
    应用激光成像系统研究非牛顿流体中的气泡生成
    姜韶堃, 范文元, 朱春英, 马友光, 李怀志
    . 2007, 15(4):  611-615.  doi:
    摘要 ( )   PDF (286KB) ( )  
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    A self-developed laser image measurement system was established to study the behavior of
    bubble for-mation at a single orifice in non-Newtonian polyacrylamide (PAAm) solutions.
    Images of bubbles were captured by a CCD camera and volumes of bubbles were digitally
    analyzed online. The effects of rheological property of PAAm solution, orifice, reservoir,
    and gas flowrate on bubble formation were studied experimentally. It is found that the
    volume of bubble increases with the concentration of PAAm solution, the diameter of the
    orifice, and the gas flowrate, respectively, whereas little effect of reservoir is observed
    in experiments.
    基于膜射流乳化技术的TiO2大孔陶瓷制备方法研究
    景文珩, 吴守红, 薛业建, 金万勤, 邢卫红, 徐南平
    . 2007, 15(4):  616-618.  doi:
    摘要 ( )   PDF (523KB) ( )  
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    A novel method to prepare macroporous TiO2 ceramic, based on membrane emulsification was
    reported. To solve the paradox between the instability of nonaqueous emulsion and long
    emulsification time required by the membrane emulsification, a two-stage ceramic membrane
    jet-flow emulsification was proposed. Discussion was conducted on the evolution of droplet
    size with time, which followed the Ostwald ripening theory. And a monodis-persed nonaqueous
    emulsion with an average droplet size of 1.6μm could be prepared. Using the emulsion as a
    template, TiO2 ceramics with an average pore size of 1.1μm were obtained. The material
    could be prospectively used for preparation of catalysts, adsorbents, and membranes.