Patent · US Active

Method for the separation of polymeric by-products from 1,4-butynediol

US7538254B2 · kind B2 · utility

4Cited by

3References

8Claims

0Family size

Assignee

BASF SE

Inventors

Rudolf Erich Lorenz · Ludwigshafen, DE
Rolf Pinkos · Bad Dürkheim, DE
Michael Steiniger · Neustadt, DE
Gerd Schaefer · Monsheim, DE
Thomas Danner · Erpolzheim, DE

Key dates

Filing date	Aug 23, 2006
Grant date	May 26, 2009
Priority date	—
Expiry date	Aug 23, 2026

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C29/172
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for purifying 1,4-butynediol, which comprises compressing 1,4-butynediol to from 50 to 1500 bar, depressurizing it, waiting for phase separation to occur after depressurization and separating off the bottom phase, and a process for the hydrogenation of 1,4-butynediol to 1,4-butenediol and 1,4-butanediol using the purified 1,4-butynediol.

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