申请人:Kobayashi Yoichi
公开号:US20050176115A1
公开(公告)日:2005-08-11
A practical method for producing methionine is presented. When a substance capable of producing methionine through hydrolysis is used as raw material and converted into methionine by using a biocatalyst, the biocatalyst is repeatedly usable and the accumulation amount of methionine dissolved in the reaction solution is increased, and methionine is obtained in a solid form from the reaction solution. Specifically, the present invention relates to a method for producing methionine comprising the following steps: a first step of converting raw material capable of producing methionine through hydrolysis of 2-amino-4-methylthiobutyronitrile, and 2-amino-4-methylthiobutanamide or the like in an aqueous ammonia solution, into methionine-containing aqueous ammonia solution, with a biocatalyst through hydrolysis, a second step of separating the biocatalyst from the methionine-containing aqueous ammonia solution obtained in the first step, and a third step of distilling ammonia out of the methionine-containing aqueous ammonia solution separated in the second step to deposit and separate crystals of methionine.
本发明提供了一种生产蛋氨酸的实用方法。当使用一种能够通过水解产生蛋氨酸的物质作为原料,并利用生物催化剂将其转化为蛋氨酸时,生物催化剂可以反复使用,并且反应溶液中溶解的蛋氨酸积累量增加,从反应溶液中得到固体蛋氨酸。具体地,本发明涉及一种生产蛋氨酸的方法,包括以下步骤:第一步,在氨水溶液中,通过水解将能够产生蛋氨酸的原料,如2-氨基-4-甲基硫丁腈和2-氨基-4-甲基硫丁酰胺等,与生物催化剂一起转化为含蛋氨酸的氨水溶液;第二步,将在第一步中获得的含蛋氨酸的氨水溶液与生物催化剂分离;第三步,蒸馏氨水溶液,使蛋氨酸结晶并分离出来。