Experiments and model development of <i>p</i>-nitrochlorobenzene and naphthalene purification in a continuous tower melting crystallizer

Wenlong Xiao; Yonglin Li; Zhengming Yi; Sheng Yang; He'an Luo

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Experiments and model development of p-nitrochlorobenzene and naphthalene purification in a continuous tower melting crystallizer

Full Length Article | Updated：2026-01-06

- Experiments and model development of p-nitrochlorobenzene and naphthalene purification in a continuous tower melting crystallizer
- Chinese Journal of Chemical Engineering Vol. 64, Issue 12, Pages: 9-17(2023)
- Affiliations：
  
  1. School of Chemical Engineering, Xiangtan University,Xiangtan,China,411105
  2. College of Materials and Chemical Engineering, Hunan Institute of Engineering,Xiangtan,China,411105
  3. School of Energy Science and Engineering, Central South University,Changsha,China,410083
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2023
- Accepted：
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-nitrochlorobenzene and naphthalene purification in a continuous tower melting crystallizer[J]. 中国化学工程学报, 2023, 64(12): 9-17.
DOI：

-nitrochlorobenzene and naphthalene purification in a continuous tower melting crystallizer[J]. 中国化学工程学报, 2023, 64(12): 9-17. DOI：

摘要

Abstract

With the increasing demand for high-purity products

the industrial application of melt crystallization technology has been highly concerned. In this study

the purification process of nitrochlorobenzene binary eutectic system (NBES) and naphthalene–benzothiophene solid solution system (NBSSS) in tower melting crystallizer is analyzed

and a mathematical model of crystallization process is established. The key parameters in terms of feed concentration

crystal bed height

reflux ratio and stirring speed efficiency on purification effects were discussed by the established model. The results show that the concentration of

-nitrochlorobenzene was purified from 90.85% to 99.99%

when the crystal bed height is 600 mm

the reflux ratio is 2.5

and the stirring speed is 12 r·min

-1

. The naphthalene concentration is purified from 95.89% to 99.99%

when the crystal bed height is 400 mm

the reflux ratio is 1.43

and the stirring speed is 16 r·min

-1

. The quality of the model is evaluated by the ARD (average relative deviation). The minimum ARD values of the NBES and NBSSS are 2.39% and 5.22%

respectively

indicating the model satisfactorily explains the purificat

ion process.

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⁰

Experiments and model development of p-nitrochlorobenzene and naphthalene purification in a continuous tower melting crystallizer

DOI：

摘要

Abstract

关键词

Keywords

references