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US 2013/0277276 A1Published application
Quaternary ammonium surfactants
AssigneeBoard of Regents, The University of Texas System
InventorsUpali P. Weerasooriya, Gary A. Pope, Kishore Mohanty
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Abstract
Provided herein, inter alia, are novel compositions and methods having application in the field of enhanced oil recovery. In particular, the quaternary ammonium compounds and mixtures thereof presented herein can be used, inter alia, for the recovery of a large range of crude oil compositions from challenging reservoirs.
Claims22
A compound having the formula:
- wherein
- R1 is R12-substituted or unsubstituted C8-C150 alkyl, R6-substituted or unsubstituted heteroalkyl, R6-substituted or unsubstituted aryl or R6-substituted or unsubstituted cycloalkyl;
- R6 is R7-substituted or unsubstituted C1-C50 alkyl, R7-substituted or unsubstituted heteroalkyl, R7-substituted or unsubstituted aryl or R7-substituted or unsubstituted cycloalkyl;
- R7 is R8-substituted or unsubstituted C1-C50 alkyl, R8-substituted or unsubstituted heteroalkyl, R8-substituted or unsubstituted aryl or R8-substituted or unsubstituted cycloalkyl;
- R8 is R9-substituted or unsubstituted C1-C50 alkyl, R9-substituted or unsubstituted heteroalkyl, R9-substituted or unsubstituted aryl or R9-substituted or unsubstituted cycloalkyl;
- R9 is R10-substituted or unsubstituted C1-C50 alkyl, R10-substituted or unsubstituted heteroalkyl, R10-substituted or unsubstituted heteroalkyl, R10-substituted or unsubstituted aryl or R10-substituted or unsubstituted cycloalkyl;
- R10 is R11-substituted or unsubstituted C1-C50 alkyl, R11-substituted or unsubstituted heteroalkyl, R11-substituted or unsubstituted aryl or R11-substituted or unsubstituted cycloalkyl;
- R11 is unsubstituted C1-C50 alkyl, unsubstituted heteroalkyl, unsubstituted aryl or unsubstituted cycloalkyl;
- R12 is unsubstituted heteroalkyl, unsubstituted aryl or unsubstituted cycloalkyl;
- R2, R3, and R4 are independently unsubstituted alkyl, unsubstituted cycloalkyl, unsubstituted aryl, —OR13, —C(O)OR13, or —S(O)mR13;
- R13 is hydrogen, unsubstituted alkyl or unsubstituted cycloalkyl;
- m is 3 or 4;
- R5 is independently hydrogen or unsubstituted C1-C6 alkyl;
- L1, L2, L3, and L4 are independently a bond, substituted or unsubstituted alkylene, substituted or unsubstituted heteroalkylene, substituted or unsubstituted cycloalkylene, or substituted or unsubstituted arylene;
- and
- n is an integer from 10 to 210.
13 more elements
Dependencies are inferred from the claim text.