发明名称 |
Production of xylylenediamines |
摘要 |
A method of producing xylylenediamine by a two-stage hydrogenation of a starting phthalonitrile in a solvent. The main steps of the method are a hydrogenation step 1 and a hydrogenation step 2. In the hydrogenation step 1, a solution of the starting phthalonitrile in the solvent containing liquid ammonia is fed to an inlet of a first reaction zone and the hydrogenation is carried out in the first reaction zone in the presence of a heterogeneous catalyst, to hydrogenate nitrile groups in the starting phthalonitrile to aminomethyl groups. A part of the hydrogenation product solution from the first reaction zone is circulated to the inlet of the first reaction zone and the rest is introduced into the hydrogenation step 2 where further undergoes the hydrogenation.
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申请公布号 |
US7626057(B2) |
申请公布日期 |
2009.12.01 |
申请号 |
US20070768949 |
申请日期 |
2007.06.27 |
申请人 |
MITSUBISHI GAS CHEMICAL COMPANY, INC. |
发明人 |
KUMANO TATSUYUKI;SHIGEMATSU RYUSUKE;KATO KINJI;NAKAYA KENJI |
分类号 |
C07C209/00 |
主分类号 |
C07C209/00 |
代理机构 |
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