中国石油大学学报（自然科学版）2012，Vol.36Issue(6)：177-182,6.DOI:10.3969/j.issn.1673-5005.2012.06.033
乙腈为溶剂的丙烯直接环氧化连续反应研究
Continous reaction of propylene epoxidation in acetonitrile solvent
摘要
Abstract
In the continuous reaction of propylene epoxidation to propylene oxide over TS-1, the effects of reactants mole ratio, reaction pressure, reaction temperature, concentration of hydrogen peroxide and LHSV on hydrogen peroxide conversion and selectivity of propylene oxide were systematically investigated in acetonitrile solvent. Then the mechanism of propylene epoxida-tion and acetaldehyde formation in acetonitrile solvent were researched. The results show that under optimized technological conditions, there are no etherate produced and the selectivity of propylene oxide is always 100%. Meanwhile, the conversion of hydrogen peroxide and the yield of propylene oxide could reach 88% and 71% separately. As an aprotic solvent, the epoxida-tion activity of acetonitrile is lower than alcohols solvents. The inactive and alkalescent properties of acetonitrile effectively inhibit the ring-opening of propylene oxide, so the generating of etherification and hydrolysis byproducts can be avoided.关键词
丙烯环氧化/TS-1分子筛/乙腈/高选择性/机制Key words
propylene epoxidation/ molecular sieve TS-1/ acetonitrile/ high selectivity/ mechanism分类
化学化工引用本文复制引用
李奕川,沈本贤,赵基钢..乙腈为溶剂的丙烯直接环氧化连续反应研究[J].中国石油大学学报（自然科学版）,2012,36(6):177-182,6.基金项目
国家"863计划"项目(2012AA040306) （2012AA040306）
天津市科技创新专项(06FZZDGX00500) （06FZZDGX00500）
