ZSM-5分子筛气相催化合成N-甲基吡咯烷酮

研究了ZSM-5分子筛气相催化γ-丁内酯与甲胺水溶液合成N-甲基吡咯烷酮（NMP）的反应，考察了空速、反应温度、分子筛硅铝比以及原料投料比等因素对NMP产率的影响。结果表明，以硅铝摩尔比为120的ZSM-5分子筛作催化剂，在n(甲胺):n(γ-丁内酯) :n(水)=1.5:1.0:30、空速为0.5 h–1、反应温度为300 ℃、常压的条件下，N-甲基吡咯烷酮产率达到99%左右。

VAPOR-PHASE SYNTHESIS OF N-METHYL-2-PYRROLIDONE CATALYZED BY ZSM-5 ZEOLITE

A process for vapor-phase synthesis of N-mehtyl-2-pyrrolidone (NMP) from γ-butyrolactone (GBL) and aqueous methylamine over ZSM-5 molecular sieve was studied. The effects of liquid hourly space velocity (LHSV), reaction temperature, silica to alumina ratio of ZSM-5 molecular sieve and molar ratios of raw materials on the yield of NMP were investigated. Test results showed that using ZSM-5 molecular sieve catalyst with silica to alumina ratio of 120, under the conditions of molar ratios of methylamine: GBL: water was optimized to 1.5: 1.0: 30, LHSV of 0.5 h-1, under atmospheric pressure and a reaction temperature of 300 ℃, the yield of NMP could reach about 99%.