Process for the production of mixtures of alkylated aromatic hydroxy compounds

US4348542A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Volker Serini · Krefeld, DE
• Rainer Neumann · Krefeld, DE
• Gerhard Friedhofen · Krefeld, DE
• Dieter Freitag · Krefeld, DE
• Jürgen Heuser · Krefeld, DE
• Hans-Helmut Schwarz · Krefeld, DE

Key dates

• Filing date: Jul 9, 1980
• Grant date: Sep 7, 1982
• Expiry date: Jul 9, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G64/24
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the production of mixtures of alkylated aromatic polyhydroxy compounds by reacting alkylated phenols with carbonyl compounds, wherein acidic organic ion exchangers are used as catalysts and commercial dialkyl phenols as the phenol and any unreacted starting phenols separated off are completely recycled into the process without intermediate purification, and the application of the thus produced polyhydroxyl compounds for making thermoplastic polycarbonates.