摘要
先后采用氨丙基三乙氧基硅烷、甲醛甲酸溶液和溴乙烷对大孔硅胶进行硅烷化、叔胺化和季铵化,制得改性硅胶,并考察了其对环氧乙烷水合制乙二醇的催化性能和催化剂的膨胀情况.结果表明,在n(EO) /n(H2 O) =1/2 2 ,95℃和1 0MPa的条件下,环氧乙烷转化率为95 8% ,乙二醇选择性为97 5 % .反应2 16h后。
Ethylene glycol (EG) is an important raw material used to produce polyethylene terephthalate for fibers and bottles, and it is also used as a solvent and antifreezer. The demand for EG increases rapidly. EG is mainly synthesized by the liquid-phase hydration of ethylene oxide (EO), and the main by-products are diethylene glycol and triethylene glycol.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2005年第5期355-356,共2页
基金
SupportedbytheNationalNaturalScienceFoundationofChina (2 0 2 740 17)
关键词
硅胶
修饰
水合
环氧乙烷
乙二醇
silica gel
modification
hydration
ethylene oxide
ethylene glycol
