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Title: Switchable solvents and methods of use thereof

Patent ·
OSTI ID:1130056
; ; ;

A solvent that reversibly converts from a nonionic liquid mixture to an ionic liquid upon contact with a selected trigger, e.g., contact with CO.sub.2, is described. In preferred embodiments, the ionic solvent is readily converted back to the nonionic liquid mixture. The nonionic liquid mixture includes an amidine or guanidine or both, and water, alcohol, or a combination thereof. Single component amine solvents that reversibly convert between ionic and non-ionic states are also described. Some embodiments require increased pressure to convert; others convert at 1 atmosphere.

Research Organization:
Queen's Univ., Kingston, ON (Canada); Georgia Institute of Technology, Atlanta, GA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FG02-99ER14986
Assignee:
Queen's University at Kingston (CA); Georgia Tech Research Corporation (Atlanta, GA)
Patent Number(s):
8,710,265
Application Number:
13/969,984
OSTI ID:
1130056
Resource Relation:
Patent File Date: 2013 Aug 19
Country of Publication:
United States
Language:
English

References (7)

Synergistic antimicrobial combination of polyether phosphonates and non-oxidizing biocides patent October 1995
Reversibly switchable surfactants and methods of use thereof patent October 2012
Switchable solvents and methods of use thereof patent August 2013
Invert emulsion fluids suitable for drilling patent May 1999
Oil-based drilling fluid patent April 2001
Buffered well fluids patent December 2002
Switchable solvents and methods of use thereof patent July 2011

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