Patent · US Expired

Oxidation process of reactive aromatics with reactivation of the catalyst using potassium permanganate

US4477380A · kind A · utility

14Cited by

2References

6Claims

0Family size

Assignee

Rutgerswerke Aktiengesellschaft · DE

Inventors

Ulrich Knips · Bönen, DE
Bertram Bohmer · Grafenau, DE
Roland Herzberg · Castrop-Rauxel, DE

Key dates

Filing date	Jul 23, 1982
Grant date	Oct 16, 1984
Priority date	—
Expiry date	Jul 23, 2002

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/584
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

In the oxidation of reactive aromatics with molecular oxygen in carboxylic acid solution in the presence of a catalyst consisting of a cobalt compound and possibly with addition of a manganese and a bromine compound suitable as Co-catalyst, an inactivation of the catalyst system readily occurs. This is prevented in that after each reaction cycle the catalyst is reactivated by treatment with a strong oxidant and the water formed in the reaction is removed by distillation.

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