Patent · US Expired

Process for preparing acyloxybenzenesulfonates

US6864381B2 · kind B2 · utility

0Cited by

11References

12Claims

0Family size

Assignee

Clariant Corporation · DE

Inventors

Alexander Lerch · Gelnhausen, DE
Michael Seebach · Hattersheim, DE
Wolf-Dieter Mueller · Laufenburg (Baden), DE

Key dates

Filing date	Jan 13, 2004
Grant date	Mar 8, 2005
Priority date	—
Expiry date	Jan 13, 2024

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C303/22
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing acyloxybenzenesulfonates by reacting a carboxylic acid derivative with a salt of a phenolsulfonic acid in the presence of an antioxidant, preferably 2,6-di-tert-butyl-4-methylphenol. The addition of such antioxidants gives a product having a high color quality.

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