Process for the production of high purity tartaric acid
    3.
    发明授权
    Process for the production of high purity tartaric acid 失效
    生产高纯度酒石酸的方法

    公开(公告)号:US5087746A

    公开(公告)日:1992-02-11

    申请号:US652498

    申请日:1991-02-11

    IPC分类号: C07C51/367

    CPC分类号: C07C51/367

    摘要: Disodium tartrate which can be easily converted to tartaric acid is produced by hydrolysis of an epoxysuccinate. Formation of impurities is minimized and the reaction time shortened by performing the hydrolysis under superatmospheric pressure and elevated temperature at a pH in the range of from about 6 to about 11.

    摘要翻译: 可以容易地转化成酒石酸的酒石酸二钠通过环氧琥珀酸盐的水解产生。 杂质的形成最小化,并且通过在超大气压和升高的温度下在约6至约11的范围内进行水解来缩短反应时间。

    Preparation of anhydropolyamino acids at temperatures of 350.degree. C.
or above
    5.
    发明授权
    Preparation of anhydropolyamino acids at temperatures of 350.degree. C. or above 失效
    在350℃或更高温度下制备脱氢氨基酸

    公开(公告)号:US5449748A

    公开(公告)日:1995-09-12

    申请号:US364633

    申请日:1994-12-27

    申请人: Skippy H. Ramsey

    发明人: Skippy H. Ramsey

    IPC分类号: C08G73/10 C08G69/10

    CPC分类号: C08G73/1092

    摘要: There is disclosed a process for preparing polysuccinimide by thermal condensation of L-aspartic acid to produce polysuccinimide wherein the L-aspartic acid is exposed to an atmosphere in excess of about 350.degree. C. and to a temperature in the range of from about 350.degree. C. to about 400.degree. C. for a period of time of from about 6 to about 15 minutes. Under such conditions, at least about 90% conversion of the L-aspartic acid is provided. The polysuccinimide may be hydrolysed to provide polyaspartic acid by conventional hydrolysis under basic conditions.

    摘要翻译: 公开了通过L-天冬氨酸的热缩合制备聚琥珀酰亚胺以制备聚琥珀酰亚胺的方法,其中L-天冬氨酸暴露于超过约350℃的气氛和约350℃的温度范围内 在约400℃下进行约6至约15分钟的时间。 在这种条件下,提供L-天冬氨酸的至少约90%转化率。 可以在碱性条件下通过常规水解将聚琥珀酰亚胺水解以提供聚天冬氨酸。