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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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莰烯与2-甲基-1,3-丙二醇烷氧基化反应的研究
DOI: 10.13232/j.cnki.jnju.2015.04.006, PP. 692-699
Keywords: 莰烯,2-甲基-1,3-丙二醇,烷氧基化,阳离子交换树脂
Abstract:
以大孔强酸性阳离子交换树脂为催化剂，莰烯与2-甲基-1,3-丙二醇反应主要生成异冰片基羟异丁基醚。在小试搅拌反应釜内分别考察了不同阳离子交换树脂、搅拌速度、催化剂用量、反应物配比、溶剂和反应温度等对该烷氧基化反应的影响。结果表明，较佳的工艺条件为：催化剂为无水lewatit2620，用量为总的液体物料质量的20%，莰烯与2-甲基-1,3-丙二醇的初始质量比为1.5:1，反应温度为353k，反应时间为4h，此时莰烯的转化率为78.80%，异冰片基羟异丁基醚的选择性为93.5%。lewatit2620重复使用八次后仍具有良好的反应活性。为校正溶液的非理想性，采用unifac基团贡献法估算活度系数，并得到不同温度下的反应平衡常数。此外，基于同样的反应条件，在放大20倍的搅拌反应釜器中，莰烯的转化率与小试的结果基本一致。
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