发明名称 |
Process for producing citric acid and/or citrates |
摘要 |
Citric acid and/or the salts thereof are produced from a raw material containing carbohydrates. An aqueous solution of the raw material is converted into a first solution containing citric acid by means of fermentation, and from the first solution a second solution containing citric acid is obtained by means of a cell separation. The second solution is subjected to a protein precipitation at temperatures of 2 to 70 DEG C., and protein is separated by filtration. From the filtration, a third solution containing citric acid is obtained, and the same is passed through a first anion exchanger. The solution containing citric acid, which is discharged from the first anion exchanger, is passed through a second anion exchanger, which is selectively charged with citric acid. The second anion exchanger charged with citric acid is eluted with hydroxide solution or water, and there is thus obtained a fourth solution, in which citrate or citric acid is dissolved. Water is at least partly removed from the fourth solution.
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申请公布号 |
US6087139(A) |
申请公布日期 |
2000.07.11 |
申请号 |
US19980176647 |
申请日期 |
1998.10.22 |
申请人 |
METALLGESELLSCHAFT AKTIENGESELLSCHAFT |
发明人 |
BOENSCH, RUDOLF;HOHMANN, KLAUS;KUHN, JUERGEN;CERNY, VACLAV;HOTEK, FRANTISEK;PENDL, JIRI |
分类号 |
C07C51/42;C07C51/47;(IPC1-7):C12P7/48 |
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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