Patent · US Expired

Process for decreasing the halogen content of polyhalogenated aromatics

US5292975A · kind A · utility

1Cited by

1References

8Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Heinrich Schrage · Krefeld, DE
Helmut Fiege · Leverkusen, DE

Key dates

Filing date	Feb 23, 1993
Grant date	Mar 8, 1994
Priority date	—
Expiry date	Feb 23, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C17/00
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

When the halogen content of polyhalogenated aromatics is decreased by reaction with monohalogenated and/or non-halogenated aromatics in the gas phase, good yields and significantly improved catalyst service lives are achieved if the reaction is carried out in the presence of a catalyst and in the presence of a hydrogen halide.

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