Patent · US Expired

Increasing the yield of 2.5.6-trimethylcyclohex-2-en-1-one

US4820874A · kind A · utility

1Cited by

4References

8Claims

0Family size

Assignee

BASF SE

Inventors

Peter Tavs · Schifferstadt, DE
Harald Laas · Frankenthal (Pfalz), DE
Horst Schauer · Mutterstadt, DE
Lothar Arnold · Heidelberg, DE

Key dates

Filing date	Oct 23, 1987
Grant date	Apr 11, 1989
Priority date	—
Expiry date	Oct 23, 2007

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C45/85
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The yield of 2,5,6-trimethyl-cyclohex-2-en-1-one is increased by reacting diethyl ketyone, in the presence of an alkali, with crotonaldehyde or a compound which is converted to crotonaldehyde under the reaction conditions chose, and working up the reaction mixture by distillation, by a method in which the distillation residue obtained is either PA0 (a) heated at from 120.degree. to 250.degree. C. in particular from 120.degree. to 200.degree. C., with the addition of a catalytic amount of an alkali, or PA0 (b) heated at from 150.degree. to 250.degree. C. without the addition of such a substance, and the mixture of 2,5,6-trimethylcyclohex-2-en-1-one and diethyl ketone which is formed from the distillation residue as a result of the heat treatment is separated by distillation.

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