Process for producing methionine
    17.
    发明专利
    Process for producing methionine 审中-公开
    生产甲硫氨酸的方法

    公开(公告)号:JP2012201672A

    公开(公告)日:2012-10-22

    申请号:JP2011070777

    申请日:2011-03-28

    摘要: PROBLEM TO BE SOLVED: To provide a process for producing methionine capable of improving the recovery rate of methionine as a second crystal.SOLUTION: The process for producing methionine comprises: a hydrolysis step (1) of hydrolyzing 5-[2-(methylthio)ethyl]imidazolidine-2,4-dione in the presence of a basic potassium compound; a first crystallization step (2) of introducing carbon dioxide into a reaction liquid obtained in step (1), thereby precipitating methionine, and separating the resulting slurry into a precipitate and a mother liquid; a heating step (3) of heat-treating the mother liquid obtained in step (2); and a second crystallization step (4) of introducing carbon dioxide into the mother liquid heat-treated in step (3), thereby precipitating methionine and potassium bicarbonate, and separating the resulting slurry into a precipitate and a mother liquid, wherein the alanine content in the mother liquid to be subjected to step (4) is 0.75 wt.% or less.

    摘要翻译: 待解决的问题:提供能够提高作为第二晶体的甲硫氨酸的回收率的甲硫氨酸的方法。 解决方案:产生甲硫氨酸的方法包括:在碱性钾化合物存在下水解5- [2-(甲硫基)乙基]咪唑烷-2,4-二酮的水解步骤(1) 将二氧化碳引入到步骤(1)中获得的反应液中的第一结晶步骤(2),从而沉淀甲硫氨酸,并将所得浆料分离成沉淀物和母液; 对步骤(2)中得到的母液进行热处理的加热步骤(3); 以及将二氧化碳引入在步骤(3)中热处理的母液中的第二结晶步骤(4),从而沉淀甲硫氨酸和碳酸氢钾,并将所得浆料分离成沉淀物和母液,其中丙氨酸含量 要进行步骤(4)的母液为0.75重量%以下。 版权所有(C)2013,JPO&INPIT