Low energy process of producing gasoline-ethanol mixtures
Patent 4297172 Issued on October 27, 1981. Estimated Expiration Date: 
January 23, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 23, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2402077 2591672 InventorAssigneeApplicationNo. 06/114699 filed on 01/23/1980US Classes:203/19, Ethanol203/44, Of distillate44/451, Alkanol44/453Dehydration processes, and products thereofExaminersPrimary: Sever, FrankInternational ClassesC07C 29/80 (20060101)C07C 29/00 (20060101) B01D 3/00 (20060101) B01D 3/14 (20060101) AbstractGasoline-ethanol mixtures useable as motor fuel are produced by a relatively low energy process comprising interrelated distillation and extraction steps. In the first step, aqueous ethanol, such as an ethanol fermentation beer, is subjected to fractional distillation to produce a distillate of at least 75 weight percent ethanol, which is then subjected to extraction with gasoline under conditions producing an extract containing the desired amount of ethanol, such as 8 to 14% by weight. The aqueous phase raffinate from the extraction is returned to the fractionation column for redistillation. | |
