Basf Aktiengesellschaft

Gerd Schaefer

Rolf Pinkos

Michael Steiniger

Rudolf Erich Lorenz

Thomas Danner

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.

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

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&#xb0; C. at a shear rate in the radial gap between rotor and stator of the mixing apparatus of more than 100 000 sec; phase separating the processed 1,4-butynediol at a temperature of from 25 to 150&#xb0; 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.

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&#xb0; C. at a shear rate in the radial gap between rotor and stator of the mixing apparatus of more than 100 000 sec, awaiting phase separation at temperatures of from 25 to 150&#xb0; 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.

Growing community of inventors

Monsheim, Germany

Gerd Schaefer