文献类型：期刊文献

英文题名：Synthesis of a novel polythiourethane-based acid and its catalytic activity

作者：Du, Yijun[1];Li, Chunqing[1];Sun, Xudong[1];Liang, Xuezheng[1];Qi, Chenze[1]

机构：[1]Shaoxing Univ, Inst Appl Chem, Shaoxing 312000, Peoples R China

年份：2011

卷号：6

期号：6

起止页码：933

外文期刊名：ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000298085700015)、、EI(收录号：20115114624921)、Scopus(收录号：2-s2.0-83755172118)、WOS

基金：This work was supported by the Shaoxing Key Discipline Foundation, China, Zhejiang Provincial Natural Science Foundation No. Y4080481 and Shaoxing Science and technology projects (2009A21056).

语种：英文

外文关键词：polythiourethane-based solid acid; acetylation; Schiff base; green-chemistry processes

外文摘要：Acid catalysts are very important in the production of many industrial chemicals. The novel polythiourethane-based solid acid has been synthesized via two steps. The copolymerization of tolylenediisocyanate (TDI) and 1,2-bis[(2-mercaptoethyl)thio]-3-mercapto-propane (MR) was carried out as the first step, and the amount of free mercarpto groups in the polythiourethane was controlled by adjusting the molar ratio of TDI and MR. The second step was the formation of the sulfonic acid groups by oxidation of the free mercapto groups. Possible catalytic activity was investigated through the traditional acid-catalyzed reactions including acetylation and synthesis of Schiff base. The results showed that this novel catalyst was very efficient for these reactions and produced high yields. Use of this catalyst simplifies process operations by not requiring any solvent, plus low usage amounts and low cost of the catalyst used with high yields, in particular, wide applicability and reusability are key features. The novel solid acid catalyst also has great potential for more environmental-friendly processes as it can be recycled and reused (easily separated) without any loss of activity. (c) 2010 Curtin University of Technology and John Wiley & Sons, Ltd.