Patent · US Expired

Preparation of catechol monoethers and catechols

US6013844A · kind A · utility

11Cited by

11References

5Claims

0Family size

Assignee

BASF SE

Inventors

Daniel Heineke · Ludwigshafen, DE
Uwe Dingerdissen · Seeheim-Jugenheim, DE
Joachim Wulff-Doring · Bischofswerda, DE
Michael Hesse · Westlake Village, US

Key dates

Filing date	Jul 15, 1998
Grant date	Jan 11, 2000
Priority date	—
Expiry date	Jul 15, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C41/28
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for preparing catechol monoethers or catechols of the formula Ia or Ib ##STR1## where R.sup.1 and R.sup.2 are, independently of one another, hydrogen or C.sub.1 -C.sub.8 hydrocarbon radicals, and R.sup.3 is a C.sub.1 -C.sub.8 hydrocarbon radical, which comprises a 2-hydroxycyclohexanone dialkyl ketal of the formula II or a 2-alkoxycyclohexanone of the formula III ##STR2## a) being reacted in the gas phase in the presence of palladium on zirconium oxide as catalyst to obtain compounds Ia or PA1 b) carrying out stage a) in the presence of water to obtain compounds Ib.

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