天然气化工Issue(3)：48-52,5.
聚甲醛二甲醚合成催化剂的筛选及工艺条件优化
Discrimination of catalysts and optimization of reaction conditions for synthesis of polyoxymethylene dimethyl ethers
张云 1张向京 1郝丛 1花秀艳 1张文娇1
作者信息
- 1. 河北科技大学 化学与制药工程学院，河北 石家庄 050018
- 折叠
摘要
Abstract
Polyoxymethylene dimethyl ethers (DMMn) were synthesized by the condensation of methanol and trioxymethylene. The catalysts for above reaction were screened from various solid acids, metallic oxides, ion-exchange resins and molecular sieves, in a high-pressure reactor. Some molecular sieve catalysts which showed high activities were characterized by means of pyridine adsorption IR and BET. The reaction conditions were investigated also. The results showed that molecular sieve HMCM-22 had high activity and the best selectivity to DMM2-8. Under the optimum reaction conditions: molar ratio of methanol to trioxymethylene of 1.5:1, mass ratio of catalyst to feedstock of 3%, and reaction at 150℃for 8 hours, the selectivity to DMM2-8 was up to 63.35%.关键词
柴油添加剂/固体酸/聚甲醛二甲醚/DMMn/三聚甲醛Key words
diesel additive/solid acid/polyoxymethylene dimethyl ether/DMMn/trioxymethylene分类
化学工程引用本文复制引用
张云,张向京,郝丛,花秀艳,张文娇..聚甲醛二甲醚合成催化剂的筛选及工艺条件优化[J].天然气化工,2013,(3):48-52,5.
