Patent · US Expired

Method for preparation of acetals

US4579979A · kind A · utility

8Cited by

2References

17Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Juan Andrade · Ridgewood, US
Dietrich Arntz · Oberursel, DE
Michael Kraft · Blaustein, DE
Gunter Prescher · Hanau, DE

Key dates

Filing date	Jan 24, 1985
Grant date	Apr 1, 1986
Priority date	—
Expiry date	Jan 24, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C41/58
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A method of preparation for acetals utilizing saturated or unsaturated aldehydes, in particular, the preparation of dimethylacetals of acetaldehyde, acrolein and methacrolein. The production of the acetal takes place in a liquid phase in the presence of a solid acid catalyst, such as a strongly acidic ion exchange resin or zeolite. The conversion mixture is extracted by means of water and by means of water insoluble organic solvents. There is obtained not only the desired acetals, but in addition also the unconverted initial quantities of the starting materials by a simple method and with very good yields.

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