上下游产品
CAS号513-85-9 2,3-丁二醇 | CAS号127-17-3 丙酮酸 | CAS号64-17-5 乙醇 | CAS号144-62-7 草酸 | CAS号64-19-7 冰醋酸 | CAS号109-52-4 正戊酸 | CAS号64-18-6 甲酸 | CAS号107-92-6 正丁酸 | CAS号300-85-6 DL-3-羟基丁酸海关参考信息
- 2905122000-异丙醇
2905310000-1,2-乙二醇
2905320000-1,2-丙二醇
2912110000-甲醛 - 💡 提示:海关信息按照顺序优先匹配,如需确认的海关信息,请参考相关资料。
- 详情请参考:📖 海关编码查询和海关进出口税则
专利信息
专利号:US-8383835-B2
优先权日:2007-12-26
标 题 :Process for the production of cyclic diesters of alpha-hydroxyacids
发明人:WAJC SAMUEL J; WAUTIER HENRI
权利人:KTANTON LTD; WAJC SAMUEL J; WAUTIER HENRI
摘要:Process for the synthesis of a cyclic diester of an alpha-hydroxyacid, comprising the following steps:n an alkalino-earth salt of the corresponding alpha-hydroxyacid is mixed with said alpha-hydroxyacid and water; the mixture is treated by evaporation-crystallization, so that a hydrate of the alkalino-earth salt of the linear dimer of the corresponding alpha-hydroxyacid precipitates; the hydrated salt is dehydrated to give the corresponding anhydrous salt; and the anhydrous salt is pyrolyzed, releasing the cyclic diester of the corresponding alpha-hydroxyacid and leaving the alkalino-earth hydroxide as solid residue.