发明名称 |
Production method of xylylenediamine |
摘要 |
A method of producing xylylenediamine by the hydrogenation of dicyanobenzene obtained by the ammoxidation of xylene in a high yield while prolonging the catalyst life. In the method, a molten dicyanobenzene from which compounds having a boiling point lower than that of dicyanobenzene have been removed but compounds having a boiling point higher than that of dicyanobenzene are not removed is dissolved in a solvent containing liquid ammonia. By this dissolution, at least part of dicyanobenzene polymers precipitates as insolubles. The precipitates are removed by a solid-liquid separation. By subjecting the resulting solution containing the dicyanobenzene polymers in a reduced amount to hydrogenation, xylylenediamine is produced in a high yield and the life time of hydrogenation catalyst is prolonged. |
申请公布号 |
US8212080(B2) |
申请公布日期 |
2012.07.03 |
申请号 |
US20090633223 |
申请日期 |
2009.12.08 |
申请人 |
KUMANO TATSUYUKI;NAKAYA KENJI;NAGAO SHINICHI;MITSUBISHI GAS CHEMICAL COMPANY, INC. |
发明人 |
KUMANO TATSUYUKI;NAKAYA KENJI;NAGAO SHINICHI |
分类号 |
C07C209/00;C07C211/00 |
主分类号 |
C07C209/00 |
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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