Patent · US Expired

Method for increasing yield in the production of polyvalent alcohols by splitting by-products containing acetal

US7301058B2 · kind B2 · utility

6Cited by

6References

20Claims

0Family size

Assignee

BASF SE

Inventors

Alexander Wartini · Heidelberg, DE
Tilman Sirch · Schifferstadt, DE
Johann-Peter Melder · Schifferstadt, DE
Matthias Dernbach · Eppelheim, DE

Key dates

Filing date	Jul 18, 2003
Grant date	Nov 27, 2007
Priority date	—
Expiry date	Nov 28, 2024

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C45/75
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a method for increasing yield in the production of polyvalent alcohols, especially trimethylolpropane, obtained by condensing formaldehyde with a higher aldehyde. According to the inventive method, acid treatment is carried out on a mixture (high-boiling fraction) that is obtained by reprocessing, contains derivatives of said alcohols and has a higher boiling point than the respective alcohol, and the polyvalent alcohol is recovered from the acid-treated high-boiling fraction. The inventive method is characterised in that the water content of the high-boiling fraction amounts to between 20 and 90 wt. % in relation to the entire mixture of the high-boiling fraction and water.

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