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.
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申请公布号 |
EP2202218(A1) |
申请公布日期 |
2010.06.30 |
申请号 |
EP20090178607 |
申请日期 |
2009.12.10 |
申请人 |
MITSUBISHI GAS CHEMICAL COMPANY, INC. |
发明人 |
KUMANO, TATSUYUKI;NAKAYA, KENJI;NAGAO, SHINICHI |
分类号 |
C07C209/48;C07C211/27 |
主分类号 |
C07C209/48 |
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