Patent · US Active

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

US7572941B2 · kind B2 · utility

4Cited by

5References

20Claims

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	Jan 27, 2009
Grant date	Aug 11, 2009
Priority date	—
Expiry date	Jan 27, 2029

Classification

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

Abstract

The present invention relates to processes for making 1,4-butanediol, 1,4-butenediol, or a mixture thereof by 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; phase separating the processed 1,4-butynediol at a temperature of from 25 to 150° C.; removing a bottom phase to obtain purified 1,4-butynediol; and reacting the purified 1,4-butynediol with hydrogen in the presence of a catalyst.

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