Process for the dehalogenation of halogen-containing...

Details Process for the dehalogenation of halogen-containing... Process for the dehalogenation of halogen-containing...

B - Operations, Transporting

01

J

252/1, 260/601,

B01J 23/89 (2006.01) B01J 23/50 (2006.01)

Patent

CA 1130775

- 23 - ABSTRACT Process for the dehalogenation of halogen- containing aromatic amines, which leads to the preferential production of derivatives carrying a smaller number of halogen atoms, at least one of which is located in the meta-position relative to the amino group, in the vapour phase by the action of hydrogen in the presence of a controlled-action hydrogenation catalyst compressing copper or silver at a temperature between 280° and 420°C, characterised in that the active phase of the catalyst contains, in addition to the main catalyst metal, a minor amount of an auxiliary hydrogenation catalyst consisting of another metal from group VMB of the elements

311824

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