학술논문
杂多酸型离子液体催化莰烯直接水合反应的研究 / Direct hydration of camphene catalyzed by heteropolyanion-based ionic liquids
Document Type
Academic Journal
Author
Source
化学研究 / Chemical Research. 28(3):343-347
Subject
Language
Chinese
ISSN
1008-1011
Abstract
合成了6种杂多酸型离子液体,用于催化莰烯直接水合制异龙脑,考察了催化剂的种类及用量、反应温度、反应物配比和反应时间等因素对反应的影响.实验结果表明,1-(4-磺酸基)丁基-3-甲基咪唑硅钨酸盐([BSmim]4 SiW12 O40)催化剂的活性优于传统的催化剂;合成异龙脑的适宜条件为:温度80℃,[BSmim]4 SiW12 O40催化剂用量为反应物总质量的20%,莰烯:水:异丙醇=1:1:2(质量比),反应时间3 h,在此条件下莰烯的转化率为23.55%,异龙脑的选择性为87.77%;[BSmim]4 SiW12 O40催化剂重复使用5次,其催化活性无明显下降.
Six heteropolyanion-based ionic liquids were synthesized and used as catalysts in the synthesis of isoborneol by direct hydration of camphene. The effects of catalyst type, loading, reaction tempera-ture, reactant ratio and reaction time were investigated. Compared to the traditional catalysts, [ BSmim] 4 SiW12 O40 showed superior catalytic activity. The conversion of camphene was 23.55% and the selectivity of isoborneol was 87.77% under a condition of reaction temperature 80 ℃, [ BSmim] 4 SiW12 O40 dosage 20%, reactant ratio of 1: 1: 2 ( mass ratio) and reaction time 3 h. Moreover, [ BSmim] 4 SiW12 O40 could be recycled for five times without obvious decrease in the catalytic activity.
Six heteropolyanion-based ionic liquids were synthesized and used as catalysts in the synthesis of isoborneol by direct hydration of camphene. The effects of catalyst type, loading, reaction tempera-ture, reactant ratio and reaction time were investigated. Compared to the traditional catalysts, [ BSmim] 4 SiW12 O40 showed superior catalytic activity. The conversion of camphene was 23.55% and the selectivity of isoborneol was 87.77% under a condition of reaction temperature 80 ℃, [ BSmim] 4 SiW12 O40 dosage 20%, reactant ratio of 1: 1: 2 ( mass ratio) and reaction time 3 h. Moreover, [ BSmim] 4 SiW12 O40 could be recycled for five times without obvious decrease in the catalytic activity.