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US 7,605,292 B2Granted
Method for the separation of polymeric by-products from 1,4-butynediol
AssigneeBASF SE
InventorsRudolf Erich Lorenz, Rolf Pinkos, Michael Steiniger, Gerd Schaefer, Thomas Danner
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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.
Claims21
A process for making 1,4-butanediol, 1,4-butenediol, or a mixture thereof, comprising:
- purifying a mixture comprising 1,4-butynediol by a process comprising:
- compressing said mixture to a pressure ranging from 50 to 1500 bar;
- depressurizing said mixture;
- phase-separating said mixture;
- and
- removing a bottom phase of said mixture to obtain purified 1,4-butynediol;
- and
- reacting said purified 1,4-butynediol with hydrogen in the presence of a catalyst.
5 more elements
Dependencies are inferred from the claim text.