Patent · US Expired

Method for the isolation of trimethylolpropane from a reaction mixture

US7112707B2 · kind B2 · utility

2Cited by

1References

9Claims

0Family size

Assignee

BASF SE

Inventors

Tilman Sirch · Schifferstadt, DE
Gerd Kaibel · Lampertheim, DE
Alexander Wartini · Heidelberg, DE
Matthias Dernbach · Eppelheim, DE

Key dates

Filing date	Dec 6, 2002
Grant date	Sep 26, 2006
Priority date	—
Expiry date	Sep 19, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C29/80
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Trimethylolpropane is isolated from a reaction mixture which has been obtained by reaction of n-butyraldehyde with formaldehyde in the presence of a base and, if appropriate, hydrogenation of the resulting mixture by distilling the mixture by means of a dividing wall column or a distillation column with a precolumn or a distillation column with an after-column. The process has low capital costs and a low energy consumption and gives reduced formation of high-boiling by-products.

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