摘要
以SBA-15为载体负载质量分数5%的Cs为催化剂,甲醛(三聚甲醛作为供体)与乙酸乙酯通过气相羟醛缩合反应制取丙烯酸乙酯。对溶剂类型及用量、酯醛物质的量比、反应温度、液时空速及载气流量等工艺条件进行考察。研究表明在工艺条件为醇醛物质的量比1∶1、酯醛物质的量比2.5∶1、反应温度400℃、液时空速1.5h^(-1)、载气流量50mL/min时反应效果最优,此时乙酸乙酯的转化率为34.3%,对丙烯酸乙酯的选择性为15.2%。
Ethyl acrylate was synthesized by vapor phase aldol condensation of ethyl acetate（EAC） and formaldehyde（FA,trioxane as donor） catalyzed by Cs/SBA-15, and the reaction parameters including solvent types and quantities, feedstock molar composition, reaction temperature, liquid hourly space velocity（LHSV） and carrier gas flow rate were investigated. The optimal reaction parameters were determined as follows： n（EtOH） ∶ n（EAC） ∶ n（FA） of 1 ∶ 2.5 ∶ 1, LHSV of 1.5 h^（-1）, carrier gas flow rate of 50 mL/min, and reaction temperature of 400℃. Under above conditions, the conversation of ethyl acetate was 34.3%, and the selectivity to ethyl acrylate was 15.2%.
作者
付婷
田翔
王斌斌
田恒水
FU Ting, TIAN Xiang, WANG Bin-bin, TIAN Heng-shui(School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China)
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2018年第5期49-52,121,共5页
Natural Gas Chemical Industry
关键词
丙烯酸乙酯
乙酸乙酯
甲醛
三聚甲醛
羟醛缩合
碱金属催化剂
ethyl acrylate
ethyl acetate
formaldehyde
trioxane
aldol condensation
alkali metal catalyst
