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Chemcial Industry and Engineering 2024, Vol. 41 Issue (6) :26-33    DOI: 10.13353/j.issn.1004.9533.20230139
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Optimization of synthesis of trimethylolpropane catalyzed by [Bmmim]OH by Box-Behnken method
SU Qiyi1, XIE Tian1,2,3,4, QUAN Hongdong2,3, YANG Xiuguo2,3, LI Hongyan2,3
1. School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China;
2. Chifeng Ruiyang Chemical Co., Ltd., Chifeng, Inner Mongolia 024076, China;
3. Key Laboratory of Polyol Chemical New Materials Enterprises of Inner Mongolia Autonomous Region, Chifeng, Inner Mongolia 024076, China;
4. National Key Laboratory for Efficient and Comprehensive Utilization of Medium and Low Grade Phosphate Rock and Its Associated Resources, Guiyang 550016, China

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Abstract [Bmmim] OH was synthesized by reacting [Bmmim] Br and KOH in methanol for 24 h and purified with a yield of 87.39%. Trimethylolpropane was synthesized using the synthesized [Bmmim]OH as catalyst and formaldehyde and butanal as substrates. Based on the single factor experiments, the effects of Cannizzaro reaction time, molar ratio of HCHO to CH3CH2CH2CHO, and CH3CH2CH2CHO drop acceleration on the product concentration of trimethylolpropane were investigated. A Box-Behnken response surface method is used to establish a mathematical model by taking the product concentration of trimethylolpropane as the response value. The order of interaction among the three was: molar ratio of formaldehyde and butanal > CH3CH2CH2CHO drop acceleration > Cannizzaro reaction time. The optimal process conditions were as follows: the molar ratio of formaldehyde to butanal was 3.074, the Cannizzaro reaction time was 37.21 min, and the drop acceleration was 10.45 r·min-1. The deviation between the experimental value and the predicted value is 2.65%, indicating a good fit.
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Articles by authors
SU Qiyi
XIE Tian
QUAN Hongdong
YANG Xiuguo
LI Hongyan
Keywords[Bmmim]OH   ionic liquid   trimethylolpropane   response surface method     
Received 2023-03-15;
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SU Qiyi, XIE Tian, QUAN Hongdong, YANG Xiuguo, LI Hongyan.Optimization of synthesis of trimethylolpropane catalyzed by [Bmmim]OH by Box-Behnken method[J]  Chemcial Industry and Engineering, 2024,V41(6): 26-33
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