发明名称 |
PROCESS FOR THE PREPARATION OF CRYSTALLINE SODIUM PHENYLPYRUVATE MONOHYDRATE |
摘要 |
The invention concerns a process for preparation of crystallized monohydrated sodium phenylpyruvate comprising: hot reacting benzaldehyde in an aqueous medium in the presence of a catalytic quantity of ethanolamine with the stoichiometric quantity of hydantoin, then treating the reactional medium hot at pH=14 through an excess of sodium hydroxide, acidifying to pH=9 with concentrated hydrochloric acid the so obtained solution and separating the formed precipitate. |
申请公布号 |
DE3461029(D1) |
申请公布日期 |
1986.11.27 |
申请号 |
DE19843461029 |
申请日期 |
1984.07.12 |
申请人 |
SOCIETE FRANCAISE HOECHST SOCIETE ANONYME DITE: |
发明人 |
SCHOUTEETEN, ALAIN;CHRISTIDIS, YANI |
分类号 |
C07C59/84;B01J31/00;B01J31/02;C07B61/00;C07C51/00;C07C51/41;C07C67/00;(IPC1-7):C07C59/84 |
主分类号 |
C07C59/84 |
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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