The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 1976
Filed:
Jun. 21, 1974
Wilhelm Ester, deceased, LATE OF Herne, DT;
by Brigitte Lovis, nee Ester, heir, Munster, DT;
by Wolfgang Ester, heir, Herne, DT;
Wilhelm Heitmann, Herne, DT;
Veba-Chemie AG, Gelsenkirchen-Buer, DT;
Abstract
Pure C.sub.1 -C.sub.3 alkanols are prepared from crude water containing alcohols in a continuous distillation process which includes an extractive distillation zone into which water and crude alcohols are introduced and from which is removed an impurities stream and a dilute aqueous alcohol stream; an alcohol concentration zone into which is introduced a dilute alcohol stream from the extractive distillation zone from which is withdrawn pure concentrated alcohols, a low boiling impurities stream and a high boiling impurities stream; and an impurities concentration zone into which is introduced the impurities stream from the extractive distillation zone and the high and low boiling impurities streams from the alcohol concentration zone from which is withdrawn high and low boiling impurities and an alcohol containing stream which is recycled to the extractive distillation zone with the crude alcohols. Aqueous alkali solution is injected into the alcohol concentration zone above the point at which the high boiling impurities stream is withdrawn and below the point from which pure concentrated alcohols are withdrawn. In addition, the sump product from the alcohol concentration zone is discarded or neutralized and recycled to the upper portion of the extractive distillation zone.