AQUEOUS PROCESS FOR PREPARING AMIDO-CARBOXYLIC ACIDS BY REACTING AN AMINO ACID WITH A CARBOXYLIC ACID ANHYDRIDE
    1.
    发明公开
    AQUEOUS PROCESS FOR PREPARING AMIDO-CARBOXYLIC ACIDS BY REACTING AN AMINO ACID WITH A CARBOXYLIC ACID ANHYDRIDE 失效
    含水工艺用于生产酰胺基羧酸通过与羧酸氨基酸实现

    公开(公告)号:EP0755375A1

    公开(公告)日:1997-01-29

    申请号:EP95915609.0

    申请日:1995-04-07

    IPC分类号: C07C231 C07C233

    CPC分类号: C07C231/02 Y02P20/582

    摘要: This invention relates to a process for preparing amido-carboxylic acids in water. The process involves four steps. Step (A) involves hydrolyzing a lactam at a temperature of 150 °C - 300 °C to form a mixture containing an amino acid. Step (B) involves cooling the reaction mixture formed in step (A) to a temperature of 25 °C - 100 °C. Step (C) involves reacting a carboxylic acid anhydride with the amino acid formed in step (A) to form a reaction mixture containing an organic layer which contains an amido-carboxylic acid and an aqueous layer. Step (D) involves separating the amido-carboxylic acid containing organic layer from the aqueous layer. The presence of water aids in product isolation by phase separation and recycle of the reactants. Amido-carboxylic acids are used to make bleach activators for detergents.

    AQUEOUS PROCESS FOR PREPARING AMIDO-CARBOXYLIC ACIDS
    2.
    发明授权
    AQUEOUS PROCESS FOR PREPARING AMIDO-CARBOXYLIC ACIDS 失效
    含水工艺用于生产酰胺基

    公开(公告)号:EP0755376B1

    公开(公告)日:2004-07-14

    申请号:EP95916254.6

    申请日:1995-04-07

    IPC分类号: C07C231/08

    摘要: This invention relates to a process for preparing amido-carboxylic acids in water wherein hydrolysis and amidation reactions are conducted simultaneously in a single vessel. The process involves three steps. The first step involves heating at a temperature of 150 DEG C-300 DEG C for 2 to 10 hours, a mixture containing water, a nitrogen containing compound selected from the group consisting of a lactam and an amino acid, and a carboxylic acid or ester. The second step involves cooling the reaction mixture to obtain a two-phase system containing an aqueous layer and an organic layer. The third step involves separating the amido-carboxylic acid containing organic layer from the aqueous layer. The presence of water aids in product isolation by phase separation and recycle of the reactants. Amido-carboxylic acids are used to make bleach activators for detergents.

    AQUEOUS PROCESS FOR PREPARING AMIDO-CARBOXYLIC ACIDS BY REACTING AN AMINO ACID WITH A CARBOXYLIC ACID ANHYDRIDE
    3.
    发明授权
    AQUEOUS PROCESS FOR PREPARING AMIDO-CARBOXYLIC ACIDS BY REACTING AN AMINO ACID WITH A CARBOXYLIC ACID ANHYDRIDE 失效
    含水工艺用于生产酰胺基羧酸BY氨基酸和羧酸的实现

    公开(公告)号:EP0755375B1

    公开(公告)日:1999-10-13

    申请号:EP95915609.2

    申请日:1995-04-07

    IPC分类号: C07C231/02 C07C227/22

    CPC分类号: C07C231/02 Y02P20/582

    摘要: This invention relates to a process for preparing amido-carboxylic acids in water. The process involves four steps. Step (A) involves hydrolyzing a lactam at a temperature of 150 DEG C - 300 DEG C to form a mixture containing an amino acid. Step (B) involves cooling the reaction mixture formed in step (A) to a temperature of 25 DEG C - 100 DEG C. Step (C) involves reacting a carboxylic acid anhydride with the amino acid formed in step (A) to form a reaction mixture containing an organic layer which contains an amido-carboxylic acid and an aqueous layer. Step (D) involves separating the amido-carboxylic acid containing organic layer from the aqueous layer. The presence of water aids in product isolation by phase separation and recycle of the reactants. Amido-carboxylic acids are used to make bleach activators for detergents.

    PURIFICATION OF AMIDO-CARBOXYLIC ACID BY LIQUID/LIQUID EXTRACTION
    8.
    发明公开
    PURIFICATION OF AMIDO-CARBOXYLIC ACID BY LIQUID/LIQUID EXTRACTION 失效
    清洁AMIDOCURBONSÄUREN通过液/液萃取

    公开(公告)号:EP0755377A1

    公开(公告)日:1997-01-29

    申请号:EP95916250.0

    申请日:1995-04-07

    IPC分类号: C07C231 C07C233

    CPC分类号: C07C231/24

    摘要: This invention relates to a four step process for purifying amido-carboxylic acids by liquid/liquid extraction from a reaction mixture containing an amido-carboxylic acid. The first step involves distilling impurities from a reaction mixture containing an amido-carboxylic acid to form a distillate residue. The second step involves mixing the distillate residue with a nonpolar hydrocarbon solvent wherein the mixture is maintained above the freezing point of the distillate residue. The third step involves allowing the hydrocarbon solvent and distillate residue to achieve phase separation of an organic phase containing the amido-carboxylic acid and an organic phase containing the nonpolar hydrocarbon solvent. The fourth step involves separating the organic phase containing the nonpolar hydrocarbon solvent from the organic phase containing the amido-carboxylic acid.

    PROCESS FOR PREPARING AMIDO-CARBOXYLIC ACID ESTERS HAVING INTERNAL AMIDE LINKAGES
    10.
    发明公开
    PROCESS FOR PREPARING AMIDO-CARBOXYLIC ACID ESTERS HAVING INTERNAL AMIDE LINKAGES 失效
    制备具有内酰胺键的酰氨基羧酸酯的方法

    公开(公告)号:EP0874803A1

    公开(公告)日:1998-11-04

    申请号:EP96929114.0

    申请日:1996-09-04

    IPC分类号: C07C231 C07C233

    CPC分类号: C07C231/08 C07C231/02

    摘要: The present invention relates to a one-step process for preparing amido-carboxylic acid esters having the amide nitrogen positioned between two carbonyl carbons by reacting a carboxylic acid or carboxylic acid ester with a monohydric alcohol and either a lactam, amino-carboxylic acid or a polymeric amino-carboxylic acid. In this process, amidation, esterification, alcoholysis, and hydrolysis reactions occur simultaneously.

    摘要翻译: 本发明涉及一种通过使羧酸或羧酸酯与一元醇和内酰胺,氨基羧酸或羧酸反​​应而制备具有位于两个羰基碳之间的酰胺氮的酰胺 - 羧酸酯的一步法 聚合氨基羧酸。 在这个过程中,酰胺化,酯化,醇解和水解反应同时发生。