发明名称 |
Process for the preparation of citric acid and/or citrates |
摘要 |
Producing citric acid or citrate salts from a carbohydrate-containing raw material. The process comprises purifying the raw material, fermenting an aqueous solution of the raw material, removing cells to obtain a citric acid solution, precipitating proteins at 2-70 degrees C and removing the proteins by filtration, passing the solution through a first anion exchanger Äto remove inorganic anionsÜ, passing the solution through a second anion exchanger so that the second anion exchanger is selectively loaded with citric acid, eluting the second anion exchanger with a hydroxide solution or water to obtain a citrate or citric acid solution, and removing at least some of the water from the solution.
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申请公布号 |
EP0913385(A1) |
申请公布日期 |
1999.05.06 |
申请号 |
EP19980119467 |
申请日期 |
1998.10.15 |
申请人 |
METALLGESELLSCHAFT AKTIENGESELLSCHAFT |
发明人 |
BOENSCH, RUDOLF DR.;HOHMANN, KLAUS;KUHN, JUERGEN;CERNY, VACLAV;HOTEK, FRANTISEK;PENDL, JIRI |
分类号 |
C07C51/42;C07C51/47;(IPC1-7):C07C59/265;C07C51/48 |
主分类号 |
C07C51/42 |
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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