发明名称 |
Process for producing naphtalenedicarboxylic acid. |
摘要 |
<p>A process for purifying a crude naphthalenedicarboxylic acid containing impurities and coloring substances obtained by the oxidation of a di-substituted naphthalene, dispense with the use of a large amount of alkali or acid, and producing a naphthalenedicarboxylic acid having a high purity and good color effectively and in a high recovery is disclosed, which comprises dissolving the crude naphthalenedicarboxylic acid in a mixed solvent comprising an amine compound and an alcohol and conducting crystallization.</p> |
申请公布号 |
EP0551596(A2) |
申请公布日期 |
1993.07.21 |
申请号 |
EP19920120191 |
申请日期 |
1992.11.26 |
申请人 |
MITSUBISHI PETROCHEMICAL CO., LTD. |
发明人 |
IWANE, HIROSHI;SUGAWARA, TAKAHIRO;SHIRASAKI, MIWA |
分类号 |
C07C51/43 |
主分类号 |
C07C51/43 |
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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