Process for extracting ethanol from fermentation broths for direct blending into gasoline while preserving the broth for recycling
Patent 5110319 Issued on May 5, 1992. Estimated Expiration Date: 
June 13, 2010. 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.
June 13, 2010. 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 2182550 Direct process for the production of gasohol from fermentation mixtures Low energy process of producing gasoline-ethanol mixtures Apparatus for producing alcohol fuel Alcohol and fuel production Gasoline-aided production of alcohol and fuel Process for producing fuel grade ethanol by continuous fermentation, solvent extraction and alcohol separation Patent #: 4517298 InventorsAssigneeApplicationNo. 537131 filed on 06/13/1990US Classes:44/451, Alkanol203/44, Of distillate435/7.1, Involving antigen-antibody binding, specific binding protein assay or specific ligand-receptor binding assay435/161, Ethanol435/942, Saccharomyces cerevisiae568/913Purification or recoveryExaminersPrimary: Medley, MargaretAttorney, Agent or FirmInternational ClassC10L 001/02AbstractA method of producing ethanol from a fermentation source for direct blending into gasoline to form gasohol is provided by extracting ethanol from the fermentation broth with a non-toxic solvent compatible with gasoline. The invention includes extraction outside of the fermentor and the recycling of the extracted broth back to the fermentor. An extracting column is used for the extraction and recycling and the extract can be dried before blending it with the gasoline. The preferred solvent is an alkylate.Other References
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