Patent · US Active

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

US7524996B2 · kind B2 · utility

4Cited by

2References

7Claims

0Family size

Assignee

BASF SE

Inventors

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

Key dates

Filing date	Aug 23, 2006
Grant date	Apr 28, 2009
Priority date	—
Expiry date	Aug 23, 2026

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C29/76
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for purifying 1,4-butynediol, which comprises processing 1,4-butynediol in a dynamic mixing apparatus in an inert gas atmosphere at from 25 to 150° C. at a shear rate in the radial gap between rotor and stator of the mixing apparatus of more than 100 000 sec−1, awaiting phase separation at temperatures of from 25 to 150° C. 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.