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《石化技术与应用》[ISSN:1009-0046/CN:62-1138/TQ]

期数:

2023年6期

页码:

428-432

栏目:

出版日期:

2023-11-10

文章信息/Info

Title:

Preparation and performance evaluation of solid acid catalyst for Prins condensation of formaldehyde and ethylene

文章编号:

1009-0045（2023）06-0428-05

作者:

李建祥1; 张需鹏2; 康豪1; 张强1*

1.中国石油大学（华东） 化学化工学院 重质油国家重点实验室，山东 青岛 266500；2.胜华新材料股份有限公司，山东 东营 257041

Author(s):

LI Jian-xiang1; ZHANG Xu-peng2; KANG Hao1; ZHANG Qiang1

1.State Key Laboratory of Heavy Oil Processing，College of Chemistry and Chemical Engineering，China University of Petroleum（East China），Qingdao 266500，China；2.Shenghua New Materials Co Ltd，Dongying 257041， China

关键词:

甲醛; 乙烯; 对甲苯磺酸; Prins反应; 硅基载体; 固体酸

Keywords:

formaldehyde; ethylene; p-toluene sulfonic acid; Prins reaction; silicon-based carrier; solid acid

分类号:

TQ 426.94

DOI:

DOI：10.19909/j.cnki.ISSN1009-0045.2023.06.0428

文献标识码:

B

摘要:

采用浸渍法将对甲苯磺酸（p-TSA）负载到4种不同硅基载体（SiO2，SiO2-La2O3，SBA-15和Silicalite）上制备了相应的固体酸催化剂，利用X射线衍射仪、物理吸附仪、傅立叶变换红外光谱仪、元素分析等表征手段对系列催化剂进行了表征；并与液体酸催化剂p-TSA相比较，以甲醛与乙烯的Prins反应，考察了载体对固体酸催化剂催化性能的影响。结果表明：硅基载体的比表面积和孔径越大，越有利于p-TSA分散；p-TSA在SiO2和SBA-15表面分散更均匀；以SiO2为载体所得固体酸催化剂的B酸酸量较高；在p-TSA用量相当的情况下，固体酸催化剂的催化性能均优于液体酸催化剂p-TSA的；在p-TSA负载量为55%时，以SiO2为载体所得固体酸p-TSA/SiO2作催化剂时，甲醛转化率以及1， 3-二氧六环收率和选择性均最佳，依次为87.73%，20.81%和23.73%。

Abstract:

The corresponding solid acid catalyst was prepared by impregnating p-toluene sulfonic acid （p-TSA） onto 4 different silicon-based carriers （SiO2，SiO2-La2O3，SBA-15 and Silicalite）. The catalysts were characterized by methods of X-ray diffraction， physical adsorption，Fourier transform infrared spectrometer and elemental analysis. Comparing with the liquid acid p-TSA catalyst，the effect of the support on the catalytic performance of solid acid catalyst was investigated by Prins reaction of formaldehyde and ethylene. The results showed that the larger specific surface area and pore size of silicon-based carrier，the better dispersion of p-TSA. p-TSA was more evenly dispersed on SiO2 and SBA-15 surfaces. The B acid content of solid acid catalyst obtained with SiO2 as the carrier was higher. The catalytic performance of solid acid catalyst was better than that of liquid acid p-TSA catalyst when the amount of p-TSA was the same. When the loading of p-TSA was at 55% and the solid acid p-TSA/SiO2 with SiO2 as the carrier was used as the catalyst，the formaldehyde conversion rate，1，3-dioxanocyclic yield and selectivity were the best，which were 87.73%，20.81% and 23.73%，respectively.

参考文献/References

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备注/Memo

备注/Memo:

山东省重点研发计划（重大科技创新工程）资助项目（项目编号：2021 ZLGX 06）

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更新日期/Last Update: 2023-11-10