摘要
采用活性炭负载无机碱金属氢氧化物,制备新型负载催化剂,实现由二氧化碳、甲醇和环氧丙烷一步法合成碳酸二甲酯,并重点研究了反应条件对催化剂性能的影响.结果表明,以活性炭为载体,氢氧化钠为前驱体,负载量15%,焙烧温度为600℃,反应初始压力为4 MPa的反应条件下甲醇和环氧丙烷的转化率分别为28.1%和99.9%,碳酸二甲酯(DMC)和丙二醇(PG)的选择性达到最高,分别为39.8%和40.5%.
The synthesis of dimethyl carbonate and propylene glycol from methanol, propylene oxide （PO）, and carbon dioxide over various catalysts was reported. The influences of active components and various reaction conditions e. g. temperature, CO2 pressure, reaction time, molar ratio of CH3OH/PO on the reaction were investigated. Among the used catalysts, NaOH supported with a 15 96 loading, on activated carbon heat treated at 600 ℃ in Ar atmosphere exhibits the best catalytic performance in terms of the conversion of methanol andPO, the selectivity to DMC and PG. Under the reaction conditions of 423 K, 4.0 MPa initial, 28.196 and 99.9% conversion of methanol and PO, 39.8 %, 40.5 % selectivity of DMC and PG were achieved over the NaOH/C catalyst.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第2期69-71,76,共4页
Journal of Shaanxi Normal University：Natural Science Edition
基金
陕西省自然科学基金资助项目(2006B23)
关键词
负载催化剂
一步法
碳酸二甲酯
supported catalyst
one-pot synthesis
dimethyl carbonate
