发明名称 |
Process for producing methionine |
摘要 |
Methionine is produced in an improved yield while reducing the load of waste water disposal by a process including the steps of: (A) adding at least one compound selected from potassium carbonate, potassium bicarbonate and potassium hydroxide to a solution containing 5-( beta -methylmercaptoethyl)hydantoin, (B) saturating the resulting solution with carbon dioxide gas and separating deposited methionine while leaving a first filtrate behind, (C) transferring part or whole of the first filtrate to step (D), (D) heating the transferred filtrate, adding a water-miscible solvent to it and saturating it with carbon dioxide gas to deposit methionine and potassium bicarbonate, and separating these deposits while leaving a second filtrate behind, and (E) returning the second filtrate to step (A) if desired.
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申请公布号 |
US5945563(A) |
申请公布日期 |
1999.08.31 |
申请号 |
US19970958335 |
申请日期 |
1997.10.27 |
申请人 |
SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
IMI, KATSUHARU;SHIOZAKI, TETSUYA |
分类号 |
A23K1/16;C07C319/20;C07C319/28;C07C323/58;(IPC1-7):C07C321/00 |
主分类号 |
A23K1/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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