Process of preparing para substituted phenylamines

US5689007A · kind A · utility

Assignee

• Uniroyal Chemical Company, Inc. · US

Inventors

• Russell E. Malz, Jr. · Glastonbury, US
• Gerard V. Smith · Carbondale, US
• Mark P. Ferrandino · Danbury, US
• Ruozhi Song · Wilmington, US
• Chung-Yuan Lin · Orange, US
• Franklin H. Barrows · Beacon Falls, US

Key dates

• Filing date: Oct 7, 1996
• Grant date: Nov 18, 1997
• Expiry date: Oct 7, 2016

Classification

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

Abstract

Processes of preparing para substituted phenylamines, such as, p-phenylenediamines, and particularly, p-aminodiphenylamine. One process involves contacting phenylhydroxylamine with a nucleophilic reagent, such as aniline, in specified proportions and within a specified temperature range, in the absence of oxygen, and in the presence of a homogeneous acid catalyst, such as hydrochloric acid. A second process involves contacting phenylhydroxylamine with a nucleophilic reagent, such as aniline, in the presence of a solid acid catalyst, such as acidic zeolite Y, under reaction conditions.