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时间:2020-03-26
《氯乙酸氨解法甘氨酸合成工艺的研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
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6、eng224051,China)犃犫狊狋狉犪犮狋:Theprocessconditionsofpreparingglycinebyammonolysisofchloroaceticacidarestudied.Theeffectsofreactiontemperature,catalystamountandammoniawaterconcentrationontheconversionrateofchloroaceticacidandyieldofglycinearediscussed.Theeffectsofthemethanolamoun
7、tandalcoholprecipitationtemperatureontheyieldandpurityofglycinearealsostudied.Theresultsshowthatthesuitablereactiontemperatureofammonolysisisin70-80℃,thesuitableamountofcatalystisabout15%oftheanmountofchloroaceticacid,andthehighconcentrationofammoniawaterisinfavorofthereacti
8、on.Undertheseconditions,theconversionrateofchloroaceticacidexceeds99.0%andyieldofglycineexceeds98.0%.Theresultsalsoshowthatthemethanolvolumeshouldbeas4.0-4.5timesasthevolumeofreactionliquid,thetemperatureofalcoholprecipitationisabout70-75℃.Undertheseconditions,theglycineyiel
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