Selective C-alkylation of aniline in the presence of zeolite catalysts to para-aniline

US5081302A · kind A · utility

Assignee

• First Chemical Corporation

Inventors

• Arthur C. Bayer · Ocean Springs, US
• Charles U. Pittman, Jr. · Tuscaloosa, US
• Lichang Wang · 流花街道, CN
• Earl G. Alley · Starkville, US
• Anthony C. Maliyackel · Cincinnati, US

Key dates

• Filing date: Apr 27, 1989
• Grant date: Jan 14, 1992
• Expiry date: Apr 27, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/68
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The selective ring-alkylation of anilines comprising providing a mixture of a lower alkanol and an aniline, exposing said mixture to a temperature of from 300.degree. C. to 500.degree. C., preferably from 350.degree. C. to 450.degree. C., in the presence of an acidic Y-type zeolite is described. The Y-type zeolites are predominantly selective to the formation of para-alkylanilines.