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Chemcial Industry and Engineering 2017, Vol. 34 Issue (3) :13-17    DOI: 10.13353/j.issn.1004.9533.20151077
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Optimization of Depolymerization of Paraformaldehyde by Response Surface Methodology
Sun Yongli, Xu Jianwen, Xiao Xiaoming
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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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%.

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Articles by authors
Sun Yongli
Xu Jianwen
Xiao Xiaoming
Keywordsformaldehyde;   paraformaldehyde;   response surface methodology;   optimization     
Received 2015-05-04;
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Sun Yongli, Xu Jianwen, Xiao Xiaoming.Optimization of Depolymerization of Paraformaldehyde by Response Surface Methodology[J]  Chemcial Industry and Engineering, 2017,V34(3): 13-17
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