Title: Methods for recovering a polar solvent from a fluid stream contaminated with at least one polar impurity

Abstract

A method of removing a polar solvent from a fluid volume contaminated with at least one polar impurity, such as a free fatty acid, is provided. The method comprises providing a fluid volume that includes at least one polar impurity dissolved in at least one solvent. The fluid volume is contacted with an expanding gas to remove the at least one solvent. The expanding gas may be dissolved into the at least one solvent in the fluid volume to form a gas-expanded solvent. The immiscibility of the polar impurities in the gas-expanded solvent enables separation of the polar impurities from the gas-expanded solvent. After separation of the polar impurities, at least one of the temperature and pressure may be reduced to separate the solvent from the expanding gas such that the clean solvent may be reused.

Inventors:

Ginosar, Daniel M.; Wendt, Daniel S.

Issue Date:

2012-11-13

Research Org.:

Idaho National Lab. (INL), Idaho Falls, ID (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1080426

Patent Number(s):

8308954

Application Number:

12/238,225

Assignee:

Battelle Energy Alliance, LLC (Idaho Falls, ID)

Patent Classifications (CPCs):

C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10G - CRACKING HYDROCARBON OILS

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

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C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10G - CRACKING HYDROCARBON OILS

C10G2300/1018 - of animal origin

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

Y02P30/20 - Bio-feedstock

C - CHEMISTRY C11 - ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES C11B - PRODUCING

C11B7/0025 - {in solvents containing oxygen in their molecule}

C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10G - CRACKING HYDROCARBON OILS

C10G2300/44 - Solvents
C10G2300/1014 - of vegetal origin

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DOE Contract Number:  

AC07-05ID14517

Resource Type:

Patent

Resource Relation:

Patent File Date: 2008 Sep 25

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY