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    METHOD AND SYSTEM FOR EXTRACTING LONG CHAIN DICARBOXYLIC ACID
    2.
    发明公开
    METHOD AND SYSTEM FOR EXTRACTING LONG CHAIN DICARBOXYLIC ACID 审中-公开

    公开(公告)号：EP3838383A1

    公开(公告)日：2021-06-23

    申请号：EP20178388.3

    申请日：2020-06-04

    申请人： Cathay Biotech Inc. ,  CIBT America Inc. ,  Cathay (Jinxiang) Biomaterial Co., Ltd.

    发明人： YANG, Chen ,  ZHANG, Shuhua ,  YANG, Yufeng ,  LIU, Xiucai

    IPC分类号： B01D61/14 ,  B01D61/18 ,  B01D61/58 ,  B01D9/00 ,  C07C51/42 ,  C07C55/02 ,  C07C51/41 ,  C07C51/43 ,  C07C51/47

    摘要： The present disclosure provides a method and a system for extracting long chain dicarboxylic acid, the method comprising: (1) subjecting a long chain dicarboxylic acid fermentation broth to a primary membrane filtration treatment to give a first filtrate; subjecting the first filtrate to decolorization, acidification/crystallization, and solid-liquid separation treatments to give a first solid; (2) mixing the first solid, a base and water to form a solution; subjecting the solution to a secondary membrane filtration treatment to give a second filtrate; subjecting the second filtrate to decolorization, acidification/crystallization, and solid-liquid separation treatments to give a second solid; and (3) mixing the second solid and water to form a mixture; subjecting the mixture to a thermostatic treatment at 105-150°C, followed by cooling for crystallization and solid-liquid separation treatment. By the method, the resulted long chain dicarboxylic acid product has a high purity and no residual organic solvent.

    METHOD FOR THE PRODUCTION OF A DICARBOXYLIC ACID
    4.
    发明公开
    METHOD FOR THE PRODUCTION OF A DICARBOXYLIC ACID 审中-公开

    公开(公告)号：EP3822356A1

    公开(公告)日：2021-05-19

    申请号：EP19209853.1

    申请日：2019-11-18

    申请人： Corvay Bioproducts GmbH

    发明人： The designation of the inventor has not yet been filed

    IPC分类号： C12P7/44 ,  C07C51/42 ,  C07C51/43 ,  C07C51/44 ,  B01D61/14

    摘要： The present invention is related to a method for the production of a dicarboxylic acid, wherein the method comprises
    - a bioconversion step, wherein in the bioconversion step, the dicarboxylic acid is produced from a precursor compound contained in a medium; and a
    - purification step for purifying the dicarboxylic acid from the medium, wherein the purification step comprises a nano-diafiltration step and/or a distillation step, wherein preferably if the purification step comprises both the nano-diafiltration step and the distillation step, the nano-diafiltration step is carried out prior to the distillation step, and
    wherein the dicarboxylic acid is selected from the group comprising decanedioic acid, dodecanedioic acid, tetradecanedioic acid and hexadecanedioic acid, preferably the dicarboxylic acid is dodecanedioic acid (DDDA).