响应面法优化多聚甲醛的解聚

摘要

甲醛是一种重要的化学中间体，但是运输、储存不方便，研究了在酸性条件下通过多聚甲醛解聚的方法来获得新鲜甲醛。实验首先研究了溶剂种类、反应温度、加热时间以及浓硫酸加入量等因素对多聚甲醛解聚的影响，然后在以上实验的基础上采用了3因素3水平的响应面分析法对多聚甲醛解聚的工艺条件进行了优化，得到了最适宜工艺条件：以乙酸乙酯为溶剂，反应温度为92.6 ℃，浓硫酸加入量为0.46% 和加热时间为3.9 h，此时多聚甲醛的解聚效果最好，甲醛在溶剂中的质量分数为21.1%。

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	孙永利
	许建文
	肖晓明

关键词：甲醛；多聚甲醛；响应面法；最优化

Abstract：

Formaldehyde is one kind of important chemical intermediates and can be obtained through the depolymerization of paraformaldehyde for its inconvenience in transportation and storage. In this paper, the effects of kinds of solvent, the depolymerization temperature, the heating time and addition of H₂SO₄ on the depolymerization of paraformaldehyde were investigated. According to the above experiments and Box-Benhnken design principle, the depolymerization conditions were optimized by response surface methodology (RSM) with three factors and three levels, and the optimal conditions were as follows: the solvent is ethyl acetate, reaction temperature is 92.6 ℃, addition of H₂SO₄ is 0.46% and heating time is 3.9 h. The content of formaldehyde reaches 21.1%.

Keywords： formaldehyde； paraformaldehyde； response surface methodology； optimization

Received 2015-05-04;

Corresponding Authors: 肖晓明,E-mail:xmxiao@tju.edu.cn。 Email: xmxiao@tju.edu.cn

About author: 孙永利(1967-),男,副研究员,硕士生导师,研究内容为化工传质与分离工程。

引用本文:

孙永利, 许建文, 肖晓明.响应面法优化多聚甲醛的解聚[J]. 化学工业与工程, 2017,34(3): 13-17

Sun Yongli, Xu Jianwen, Xiao Xiaoming.Optimization of Depolymerization of Paraformaldehyde by Response Surface Methodology[J]. Chemcial Industry and Engineering, 2017,34(3): 13-17

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