发明名称 |
PROCESS FOR PRODUCING DIAMINE AND POLYAMIDE |
摘要 |
By a method for producing a diamine comprising the step of purifying a diamine from an aqueous solution containing a diamine salt, the method comprising a step of adding an alkaline substance to the aqueous solution and then filtering the resulting solution by allowing the solution to pass through a nanofiltration membrane to remove the salt, thereby obtaining an aqueous diamine solution, a diamine suitable as a raw material for a polyamide can be obtained by a simpler operation than by a conventional extraction operation with an organic solvent. |
申请公布号 |
EP2263996(A4) |
申请公布日期 |
2012.11.14 |
申请号 |
EP20090720391 |
申请日期 |
2009.03.11 |
申请人 |
TORAY INDUSTRIES, INC. |
发明人 |
ITO, MASATERU;NAKAGAWA, IZUMI;KATO, KOYA;MIMITSUKA, TAKASHI;SAWAI, KENJI;MINEGISHI, SHIN-ICHI;SAWAI, HIDEKI;YAMADA, KATSUSHIGE |
分类号 |
C07C209/84;C07C211/09;C08G69/26;C08G69/28 |
主分类号 |
C07C209/84 |
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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