摘要
采用碳酸二甲酯（DMC）与正丙醇（n-PrOH）为原料，酯交换法合成碳酸二丙酯（DPC），考察了催化剂种类、物料配比、催化剂用量、温度和时间等诸因素对反应的影响。结果表明，以碳酸钾为催化剂具有较好的催化活性和选择性，在最佳反应工艺条件：常压、反应温度95℃、反应时间5h、n（n—PrOH）：n（DMC）=3：1和碳酸钾用量为原料总质量的1％下，DMC转化率为95．9％，DPC收率为73．7％。常压下DPC-DMC系统的汽液平衡温度和汽液相组成也被测定。常压下DPC和DMC二元物系不形成共沸物。
The effects of the type of catalyst, mole ratio of reactants, amount of catalyst, reaction temperature and time on the synthesis of dipropyl carbonate （DPC） from dimethyl carbonate （DMC） and n-propanol by transesterification was investigated. The resuits showed that potassium carbonate used as catalyst exhibited high activity and selectivity, and DMC conversion of 95.9% and DPC yield of 73.7% were obtained under the optimum reaction conditions of 95℃, atmospheric pressure, reaction time 5 h, n-PrOH/ DMC mole ratio of 3：1, and catalyst amount （mass ratio of catalyst to reactants） of 1%. The isobaric vapor-liquid equilibria data for the binary system of DMC and DPC, including temperature and vapor and liquid compositions were determined using a vapor liquidrecycled equilibrium still. The results showed that azeotrope didn＇t appear.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2008年第6期19-23,共5页
Natural Gas Chemical Industry
基金
江苏省教育厅高校自然科学基础研究项目（06KJB150023）
关键词
碳酸二甲酯
正丙醇
酯交换法
碳酸二丙酯
绿色合成
汽液相平衡
dimethyl carbonate
n-propanol
transesterification
dipropyl carbonate
green synthesis
vapor-liquid equilibrium
