U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

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: Icon_subject 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
Patent #: 4251231
Issued on: 02/17/1981
Inventor: Baird

Low energy process of producing gasoline-ethanol mixtures
Patent #: 4297172
Issued on: 10/27/1981
Inventor: Kyle

Apparatus for producing alcohol fuel
Patent #: 4402792
Issued on: 09/06/1983
Inventor: Horst ,   et al.

Alcohol and fuel production
Patent #: 4425137
Issued on: 01/10/1984
Inventor: Roth

Gasoline-aided production of alcohol and fuel
Patent #: 4441891
Issued on: 04/10/1984
Inventor: Roth

Process for producing fuel grade ethanol by continuous fermentation, solvent extraction and alcohol separation Patent #: 4517298
Issued on: 05/14/1985
Inventor: Tedder

Inventors

Assignee

Application

No. 537131 filed on 06/13/1990

US 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 recovery

Examiners

Primary: Medley, Margaret

Attorney, Agent or Firm

International Class

C10L 001/02

Abstract

A 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

  • D. Tedder, "Continuous Fermentation and Product Recovery by Liquid-Liquid Extraction", Biotech 84 USA pp. A177-A188
  • Minier and Goma, "Ethanol Production by Extractive Fermentation" Biotechnology and Bioengineering, vol. XXIV, pp. 1565-1579 (1982)
  • Crabbe et al., "Effective Microorganisms on Rate of Liquid Extraction of Ethanol From Fermentation Broths", Biotechnology and Bioengineering, vol. XXVIII, pp. 939-943. (1986)
  • Kollerup and Daugulis, "Screening and Identification of Extractive Fermentative Solvents Using a Data Base", Can. J. Chem. Eng. (63) 919 (1985
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