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发明公开
CN105037230A 水解5-（2-甲硫基乙基）-乙内酰脲的方法 无效 - 驳回 转让 复审申请

水解5-（2-甲硫基乙基）-乙内酰脲的方法
摘要：
本发明公开了水解5-(2-甲硫基乙基)-乙内酰脲的方法，将5-(2-甲硫基乙基)-乙内酰脲水溶液或者含有碳酸盐或者碳酸氢盐的5-(2-甲硫基乙基)-乙内酰脲水溶液在至少含有氨或氨水的无机碱溶液中，在温度为160℃～200℃，压力为0.5～4.5MPa条件下充分水解，水解溶液经过酸化可制得蛋氨酸，本发明的方法能够节省碱的用量，而且还能够大大降低副产物，并且整个过程不消耗氨，氨可以通过简单的方法回收再利用，可实现连续化生产，可用于工业化大规模生产蛋氨酸盐或蛋氨酸。
摘要（英）：

The invention discloses a method for hydrolyzing 5-(2- methylthioethyl)-hydantoin. The method comprises the following steps: sufficiently hydrolyzing a 5-(2- methylthioethyl)-hydantoin aqueous solution or a 5-(2- methylthioethyl)-hydantoin aqueous solution containing carbonate or hydrocarbonate in an inorganic alkaline solution which at least contains ammonia or ammonium hydroxide at a temperature of 160-200 DEG C and a pressure of 0.5-4.5MPa; and acidifying the hydrolyzed solution to prepare methionine. According to the method, the usage of alkali can be reduced, byproducts can be greatly reduced, and ammonia is not consumed in the whole process and can be recycled by a simple method. The method can be used for realizing continuous production, and can be used for industrial large-scale production of methionine salt or methionine.

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