Process for the production of p-tert-octyl phenol by catalytic alkylation of phenol

US4461916A · kind A · utility

Assignee

• Chemische Werke Huels, A.G. · DE

Inventors

• Helmut Alfs · Marl, DE
• Werner Boexkes · Marl, DE
• Erwin Vangermain · Marl, DE

Key dates

• Filing date: Dec 29, 1982
• Grant date: Jul 24, 1984
• Expiry date: Dec 29, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

p-tert-octyl phenol is produced by reaction of phenol with diisobutene in the presence of an acidic ion exchanger and water, in a first stage, in a solid-bed reactor at temperatures of 110.degree.-140.degree. C. and under an excess pressure of up to 5 bar. The resultant dioctyl phenol formed as a by-product is alkylated in a second stage in a further solid-bed reactor with phenol in the presence of an acidic ion exchanger, and water at temperatures of 110.degree.-140.degree. C. and under an excess pressure of up to 5 bar to obtain additional p-tert-octyl phenol.