Synthesis txoj kev ntawm glycol ether

Tau txais los ntawm cov tshuaj tiv thaiv ntawm ethylene oxide nrog ethanol. Ntawm 25-30 degree , ethylene oxide maj mam ntxiv rau anhydrous ethanol, thiab kub nce mus txog 70 degree, thiab cov tshuaj tiv thaiv tau muab tso rau hmo ntuj. Cov ethanol tau zoo lawm, neutralized nrog 10 feem pua ​​sodium hydroxide tov rau pH =8, thiab fractionated kom tau cov khoom crude. Distillation, sau 133.5-135.5 degree feem kom tau txais cov khoom tiav. Txhua tuj ntawm cov khoom siv 863kg ntawm ethylene oxide thiab 1020kg ntawm anhydrous ethanol.
Txoj kev purification: Ib qho yooj yim kom muaj impurities yog dej, diethylene glycol monoethyl ether (ethyl carbitol), ethylene glycol thiab trace acids, aldehydes thiab hais txog. Thaum refining, calcium chloride los yog anhydrous sodium sulfate yog ntxiv rau qhuav, thiab ces fractionated. Yog tias muaj peroxide, nws tuaj yeem rov qab los ntawm tin dichloride lossis tshem tawm los ntawm activated alumina kem.