Patent · US Expired

Process for the hydroxylation of phenol

US4053523A · kind A · utility

9Cited by

3References

14Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hermann Seifert · Bensberg, DE
Helmut Waldmann · Leverkusen, DE
Wulf Schwerdtel
Wolfgang Swodenk

Key dates

Filing date	Feb 28, 1975
Grant date	Oct 11, 1977
Priority date	—
Expiry date	Feb 28, 1995

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/582
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the production of pyrocatechol and hydroquinone by the hydroxylation of phenol in the nucleus with hydrogen peroxide, wherein phenol is reacted at the start of the reaction with substantially anhydrous hydrogen peroxide and wherein the reaction is carried out in the presence of a strong acid.

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