| US 7,605,292 B2 | ||
| Method for the separation of polymeric by-products from 1,4-butynediol | ||
| Rudolf Erich Lorenz, Ludwigshafen (Germany); Rolf Pinkos, Bad Duerkheim (Germany); Michael Steiniger, Neustadt (Germany); Gerd Schaefer, Monsheim (Germany); and Thomas Danner, Erpolzheim (Germany) | ||
| Assigned to BASF Aktiengesellschaft, Ludwigshafen (Germany) | ||
| Filed on Jan. 09, 2009, as Appl. No. 12/351,253. | ||
| Application 12/351253 is a continuation of application No. 12/065311, granted, now 7,538,254, previously published as PCT/EP2006/065591, filed on Aug. 23, 2006. | ||
| Claims priority of application No. 10 2005 042 184 (DE), filed on Sep. 06, 2005. | ||
| Prior Publication US 2009/0187050 A1, Jul. 23, 2009 | ||
| Int. Cl. C07C 29/17 (2006.01) | ||
| U.S. Cl. 568—861 [568/857; 568/856] | 21 Claims |
| 1. 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.
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