Patent · US Expired

Production of dimethylbenzophenone

US3933917A · kind A · utility

4Cited by

1References

6Claims

0Family size

Assignee

Badische Anilin- & Soda-Fabrik Aktiengesellschaft

Inventors

Ernst Schaffner
Heinz Eilingsfeld · Bischofswerda, DE
Manfred Patsch · Monsheim, DE

Key dates

Filing date	Aug 29, 1973
Grant date	Jan 20, 1976
Priority date	—
Expiry date	Aug 29, 1993

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C45/673
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The production of anthraquinone-1-carboxylic acid by reacting a benzoyl halide with a tert.-butylxylene in the presence of ferric chloride, adding aluminum chloride, oxidizing the dimethylbenzophenone formed and cyclizing the resulting benzophenonedicarboxylic acid. The product is a starting material for the production of dyes and pesticides.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.