Process for producing aromatic amines
    10.
    发明授权
    Process for producing aromatic amines 失效
    生产芳香胺的方法

    公开(公告)号:US5808157A

    公开(公告)日:1998-09-15

    申请号:US511165

    申请日:1995-08-04

    CPC分类号: C07C209/36

    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.degree.-500.degree. 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.

    摘要翻译: 通过在气相中通过固定催化剂氢化相关联的芳族硝基化合物来生产芳族胺。 催化剂在载体上含有活性氢化金属。 反应在绝热条件下,在2-50巴的压力和250-500℃的温度下进行。 循环气体通过催化剂,循环气体含有3-150摩尔氢,每摩尔硝基形成2-100摩尔氨基和每个氨基当量2-6摩尔水。 所形成的胺和水以及净化物流与循环气体分离。 此后,循环气体富含挥发的芳​​香硝基化合物和新鲜氢气并再循环。