Patent · US Expired

Method for the separation of formaldehyde from a reaction mixture containing polyols by the addition of solvents before and/or during the distillation

US6809224B2 · kind B2 · utility

1Cited by

5References

22Claims

0Family size

Assignee

BASF SE

Inventors

Matthias Dernbach · Eppelheim, DE
Detlef Kratz · Heidelberg, DE
Achim Stammer · Freinsheim, DE
Gerhard Schulz · Ludwigshafen, DE

Key dates

Filing date	Jun 26, 2002
Grant date	Oct 26, 2004
Priority date	—
Expiry date	Jun 26, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C45/83
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Formaldehyde is removed by distillation from reaction solutions containing a methlolated alkanal which was obtained from the reaction of formaldehyde with an alkanal which has at least one acidic hydrogen atom &agr; to the carbonyl function or from the reaction of a 2-alkylacrolein or acrolein with water and formaldehyde, by a process in which this reaction was carried out in the presence of catalytic amounts of organic amine. The process permits the improved removal of formaldehyde from the reaction mixture and furthermore facilitates the hydrogenation of the alkanals thus obtained to give polyols.

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