摘要
在实验室研究、小试和侧线试验的基础上,建立1.0kt/a丙烯与双氧水环氧化制备环氧丙烷的中试装置。采用空心钛硅分子筛改性制备的丙烯环氧化催化剂HPO-1,在一定的反应压力和丙烯与双氧水摩尔比的条件下,考察反应温度、甲醇与双氧水的摩尔比和双氧水空速等对双氧水转化率和环氧丙烷选择性的影响,确定中试工艺条件为:反应温度30～70℃,反应压力0.5～2.0 MPa,双氧水质量空速0.12～1.20h-1,甲醇与双氧水的摩尔比5～25,丙烯与双氧水的摩尔比1.2～2.5。在该条件下,运行超过6 000h,双氧水转化率为96%～99%,环氧丙烷选择性为96%～98%,催化活性未明显下降;采用双共沸蒸馏工艺分离提纯的环氧丙烷产品的纯度不小于99.97%。
The environmental friendly preparation process of propylene oxide （PO） by propylene epoxidation with hydrogen peroxide was studied. Based on the results of basic research, laboratory test and side-line testing, a 1.0 kt/a pilot plant was built for PO preparation by epoxidation of propylene with hydrogen peroxide. Factors influencing the conversion of hydrogen peroxide and PO selectivity were investigated on pilot plant, using HPO-1 catalyst containing modified hollow titanium silicalite molecular sieve. The process conditions of pilot plant test were confirmed, in which the reaction temper-ature is 30-70 ℃, the WHSV of hydrogen peroxide is 0.12-1.20 h^-1, the molar ratios of methanol to hydrogen peroxide and propylene to hydrogen peroxide are 5-25 and 1.2-2.5, respectively. Running under such conditions for more than 6 000 h, the decrease of catalyst activity is nonsignificant, the con-version of hydrogen peroxide is 96%-99% and the PO selectivity is 96%-98%. By separating with dual azeotropic distillation process and purification, the purity of PO product is more than 99.97%.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2013年第3期1-5,共5页
Petroleum Processing and Petrochemicals
基金
国家重点基础研究发展规划(973)资助项目(2006CB202508)
中国石油化工股份有限公司资助项目(S411058和S409085)
关键词
钛硅分子筛
TS-1
环氧丙烷
环氧化
丙烯
双氧水
titanium silicalite molecular sieve
TS-1
propylene oxide
epoxidation
propylene
hy-drogen peroxide
