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1.发明公开
公开(公告)号：EP3656761A1
公开(公告)日：2020-05-27
申请号：EP18834474.1
申请日：2018-07-19
IPC分类号： C07C319/28 , C07C323/58
摘要： The present invention addresses the problem of providing a method for producing purified methionine, the method being capable of preventing the caking of methionine. The present invention pertains to a method for producing purified methionine from crude methionine, the method comprising (1) a step for obtaining a wet cake of washed crude methionine, (2) a step for adjusting the pH of the wet cake, and (3) a step for drying the wet cake after the pH adjustment, wherein the pH of the wet cake after the pH adjustment is 5.2-6.1.
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公开(公告)号：EP3733646A1
公开(公告)日：2020-11-04
申请号：EP18897708.6
申请日：2018-12-25
IPC分类号： C07C319/28 , C07C323/58
摘要： An object of the present invention is to provide a refined methionine production method capable of achieving an improvement in washing efficiency. This production method is a method for producing refined methionine from a slurry of crude methionine and comprises (1) a step of separating the slurry of crude methionine into solid and liquid by using a continuous filter, (2) a step of spraying preliminary washing water on a crude cake obtained by separating the slurry of crude methionine into solid and liquid to wash the crude cake, and (3) a step of mixing a semi-refined cake obtained by spraying preliminary washing water on the crude cake to wash the crude cake with finishing washing water to wash the semi-refined cake.
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