Process for preparing hydrocarbyl aromatic amines
AssigneeEthyl Corporation
InventorsJohn F. Balhoff, Donald E. Balhoff
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Abstract
A continuous process for the hydrocarbylthiation of aromatic amines is disclosed. The process involves forming an admixture of aromatic amine, hydrocarbyl disulfide and an effective amount of a Lewis acid catalyst and subsequently allowing such admixture to flow as a thin film along a column. An inert gas is passed in a counter-current manner through the admixture. The liquid thiohydrocarbyl aromatic amine product is then separated from the gaseous effluent
Claims9
A continuous process for hydrocarbylthiation of aromatic amines which comprises:
- (i) passing a thin film feed stream comprising a hydrocarbyl disulfide, hydrocarbyl aromatic amine substituted by halogen and a catalytically effective amount of a metal halide selected from the group consisting of aluminum chloride, boron trifluoride, boron trichloride, ferric chloride, zinc chloride and copper(I) iodide along a column and countercurrently introducing into said thin film feed stream an inert gas;
- and (ii) separating a hydrocarbylthiol as a gaseous effluent and a liquid hydrocarbylthiolated aromatic amine.
A continuous process for the reaction of methyldisulfide with a mixture of 2,4-diaminotoluene and 2,6-diaminotoluene which comprises:
- (i) passing a thin film feed stream comprising dimethyl disulfide, an aromatic amine that is a mixture of 2,4-diaminotoluene and 2,6-diaminotoluene and a catalytically effective amount of copper(I) iodide along a column and countercurrently introducing into said thin film feed stream gaseous dimethyl disulfide;
- and (ii) separating gaseous methyl mercaptan as effluent and a liquid mixture of mono(methylthio)analines and di(methylthio)aniline.
Dependencies are inferred from the claim text.