Process for the preparation of methionine
    62.
    发明授权
    Process for the preparation of methionine 有权
    制备甲硫氨酸的方法

    公开(公告)号:US09156782B2

    公开(公告)日:2015-10-13

    申请号:US14386165

    申请日:2013-02-26

    摘要: The invention relates to a process for the preparation of D,L-methionine, in which carbon dioxide is fed to an aqueous potassium methioninate solution obtained by hydrolysis of 5-(2-methylmercaptoethyl)hydantoin, in order to precipitate out crude methionine, which is separated off and purified, where, for the purposes of purification, an aqueous solution of the separated-off crude methionine is prepared and subjected to a recrystallization, characterized in that the solution from which the recrystallization takes place contains potassium ions and also a crystallization additive, where the crystallization additive is a nonionic or anionic surfactant, or a mixture of different nonionic or anionic surfactants, and that the recrystallization takes place by introducing a 60 to 110° C.-hot methionine solution into a 35 to 80° C.-warm methionine suspension, the temperature of which is lower than that of the introduced solution, the temperature of the methionine suspension being maintained between 35 and 80° C. during the addition.

    摘要翻译: 本发明涉及一种制备D,L-甲硫氨酸的方法,其中将二氧化碳加入到通过5-(2-甲基巯基乙基)乙内酰脲的水解获得的甲硫氨酸钾水溶液中,以沉淀出粗蛋氨酸, 分离纯化,其中,为了纯化的目的,制备分离的粗制甲硫氨酸的水溶液并进行重结晶,其特征在于进行重结晶的溶液含有钾离子并且还具有结晶 添加剂,其中结晶添加剂是非离子或阴离子表面活性剂,或不同的非离子或阴离子表面活性剂的混合物,并且通过将60至110℃的热甲硫氨酸溶液引入35至80℃进行重结晶。 - 温血蛋氨酸悬浮液,其温度低于引入溶液的温度,甲硫氨酸悬浮液的温度维持在 在加入过程中在35和80℃之间。