Patent · US Active

Method for recovering di-trimethylolpropane and trimethylolpropane-enriched product streams from the side streams of trimethylolpropane production

US9115110B2 · kind B2 · utility

0Cited by

7References

9Claims

0Family size

Assignee

OXEA GMBH · DE

Inventors

Guido D. Frey · Riedstadt, DE
Kurt Schalapski · Oberhausen, DE
Dirk Bermann · Bad Hersfeld, DE
Norman Nowotney · Essen, DE
Heinz Strutz · Usingen, DE
Donald K. Raff · Waynesville, US

Key dates

Filing date	Oct 24, 2012
Grant date	Aug 25, 2015
Priority date	—
Expiry date	Oct 24, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C41/44
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Process for obtaining ditrimethylolpropane and trimethylolpropane-enriched product streams from the high-boiling fractions and residues which are obtained in the distillative purification of trimethylolpropane includes three stage distillation characterized in that second and third stages are configured as thin film evaporators with a column attachment with the second stage facilitating trimethylopropane recovery and the third stage facilitating ditrimethylolpropane recovery.

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