发明名称 |
PROCESS FOR PRODUCING 5-AMINOLEVULINIC ACID HYDROCHLORIDE |
摘要 |
A method for producing crystals of 5-aminolevulinic acid hydrochloride wherein, in carrying out adsorption of 5-aminolevulinic acid contained in a crude 5-aminolevulinic acid solution by a cation exchange resin and its subsequent desorption with an aqueous solution containing ammonium ion, a high purity 5-aminolevulinic acid aqueous solution is obtained using a change in electric conductivity or pH of the desorption liquid as the index, and chloride ion is added to the aqueous solution which is then mixed with an organic solvent. |
申请公布号 |
EP1927586(B1) |
申请公布日期 |
2016.04.27 |
申请号 |
EP20060797470 |
申请日期 |
2006.09.05 |
申请人 |
COSMO ALA CO., LTD. |
发明人 |
OKADA, HIDEKI;TANAKA, TOHRU;NOMURA, TAKESHI |
分类号 |
C07C227/40;C07C227/42;C07C229/22 |
主分类号 |
C07C227/40 |
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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