燃料化学学报Issue(8)：986-993,8.
分子筛催化剂催化合成聚甲氧基二甲醚
Synthesis of polyoxymethylene dimethyl ethers over zeolite catalysts
摘要
Abstract
Synthesis of polyoxymethylene dimethyl ethers was carried out on HMCM-22 , Al-YNU-1 and MOR zeolites by the condensation of trioxane and methanol or methylal. The crystal structures and surface acidity of the catalysts were characterized by XRD, SEM and NH3-TPD. It was found that DMM2~8 selectivity was influenced by the acid strength and density of zeolites and reaction conditions. HMCM-22 showed much higher selectivity to DMM2~8 than Al-YNU-1 and MOR. Under the optimal conditions, the DMM2~8 selectivity reached 65. 1% and 90. 6% in ME/TRIox and DMM/TRIox systems respectively. It was shown that the moderately strong acid sites were probably responsible for the formation of long chain DMMn , while the strong acid sites werefor DMM.关键词
HMCM-22/聚甲氧基二甲醚/甲缩醛/甲醇/三聚甲醛Key words
HMCM-22/polyoxymethylene dimethyl ethers/methylal/methanol/trioxane分类
化学化工引用本文复制引用
曹健,朱华青,王辉,黄立志,秦张峰,樊卫斌,王建国..分子筛催化剂催化合成聚甲氧基二甲醚[J].燃料化学学报,2014,(8):986-993,8.基金项目
国家自然科学基金(21273264) （21273264）
国家重点基础研究发展规划(973计划,2011CB201403,2011CB201406)。 （973计划,2011CB201403,2011CB201406）
