Chitosan-catalyzed <i>n</i>-butyraldehyde self-condensation reaction mechanism and kinetics

Xiaoxu Han; Ying Li; Hualiang An; Xinqiang Zhao; Yanji Wang

doi:10.1016/j.cjche.2019.03.005

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Chitosan-catalyzed n-butyraldehyde self-condensation reaction mechanism and kinetics

Updated：2026-01-06

- Chitosan-catalyzed n-butyraldehyde self-condensation reaction mechanism and kinetics
- Chinese Journal of Chemical Engineering Vol. 27, Issue 10, Pages: 2447-2454(2019)
- Affiliations：
  
  Hebei Provincial Key Lab of Green Chemical Technology and Efficient Energy Saving, School of Chemical Engineering and Technology, Hebei University of Technology,Tianjin,China,300130
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.03.005
  CLC：
- Published：2019
- Accepted：
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-butyraldehyde self-condensation reaction mechanism and kinetics[J]. 中国化学工程学报, 2019, 27(10): 2447-2454.
DOI：

-butyraldehyde self-condensation reaction mechanism and kinetics[J]. 中国化学工程学报, 2019, 27(10): 2447-2454. DOI： 10.1016/j.cjche.2019.03.005.

摘要

Abstract

The chitosan was found to possess an excellent catalytic performance in

-butyraldehyde selfcondensation to 2E2H. Under suitable conditions

the conversion of

-butyraldehyde

the yield and selectivity of 2E2H separately attained 96.0%

86.0% and 89.6%. The chitosan catalyst could be recovered and used for 5 times without a significant deactivation after being treated with ammonium hydroxide. In order to elucidate the reaction mechanism

the adsorption and desorption of

-butyraldehyde on the surface of chitosan were studied using

in situ

FT-IR spectroscopy analysis. The result showed that

-butyraldehyde interacts with-NH

group of chitosan to form an intermediate species with an enamine structure. Then the reaction process of

-butyraldehyde self-condensation was monitored by React-IR technique and it was found that

-butyraldehyde self-condensation to 2-ethyl-3-hydroxyhexanal followed by a dehydration reaction to 2-ethyl-2-hexenal. On this basis

chitosan-catalyzed

-butyraldehyde self-condensation reaction mechanism was speculated and its reaction kinetics was investigated. The self-condensation reaction follows auto-catalytic reaction characteristics and then the corresponding kinetic model was established.

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⁰

Chitosan-catalyzed n-butyraldehyde self-condensation reaction mechanism and kinetics

DOI：10.1016/j.cjche.2019.03.005

摘要

Abstract

关键词

Keywords

references