发明名称 |
Process for producing aromatic amines |
摘要 |
Aromatic amines are produced by hydrogenation of the associated aromatic nitro compounds in the gas phase over fixed catalysts. The catalysts contain active hydrogenation metals on supports. The reaction is conducted at a pressure of 2-50 bar and at a temperature in the range 250 DEG -500 DEG C. under adiabatic conditions. A circulating gas is passed over the catalyst, which circulating gas contains 3-150 moles of hydrogen, 2-100 moles of the amino groups to be formed per mole of nitro groups, and 2 to 6 moles of water per amino group equivalent. The amine and water formed, as well as a purification stream, are separated from the circulating gas. Thereafter the circulating gas is enriched with volatilised aromatic nitro compound and fresh hydrogen and recycled.
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申请公布号 |
US5808157(A) |
申请公布日期 |
1998.09.15 |
申请号 |
US19950511165 |
申请日期 |
1995.08.04 |
申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
LANGER, REINHARD;BUYSCH, HANS-JOSEF;WAGNER, PAUL;PENTLING, URSULA |
分类号 |
B01J23/648;B01J23/44;B01J23/64;C07B61/00;C07C209/36;C07C211/44;C07C211/45;C07C211/46;C07C211/47;C07C211/49;(IPC1-7):C07C209/04 |
主分类号 |
B01J23/648 |
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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