Patent · US Expired

Method for the preparation of 1,4-butandial

US4608443A · kind A · utility

2Cited by

13References

6Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Juan Andrade · Ridgewood, US
Gunter Prescher · Hanau, DE
Marc Samson · Lokeren, BE

Key dates

Filing date	Jan 24, 1985
Grant date	Aug 26, 1986
Priority date	—
Expiry date	Jan 24, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C45/515
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The preparation of 1,4-butandial (succindialdehyde) is obtained using acrolein. The acrolein is first converted with an alkanol into 3,3-dialkoxy-1-propene and this is then hydroformylated in the presence of hydridotristriphenylphosphine-rhodiumcarbonyl mixed with triphenylphosphine or triphenylphosphite as the catalyst. The thereby obtained 4,4-dialkoxy-butanal is removed from the hydroformylation product by means of distillation and is then hydrolyzed to 1,4-butandial.

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