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US 2023/0257644 A1Published application
Polyanionic surfactants and methods of making and using thereof
AssigneeChevron U.S.A. Inc.
InventorsGayani W. PINNAWALA, Sujeewa S. PALAYANGODA, Gregory A. WINSLOW, Varadarajan DWARAKANATH, Kerry Kennedy SPILKER, Robert George SHONG
Life of this patent
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Abstract
The present disclosure is directed to polyanionic surfactants, surfactant mixtures, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making polyanionic surfactants are also described.
Claims33
A surfactant defined by Formula I below
- or a salt thereof, wherein
- HG represents a head group comprising a sulfonate moiety or a sulfate moiety;
- R1 represents a C7-C28 alkyl group substituted with from one to three sulfonate moieties, from one to three pendant polycarboxylate moieties, or any combination thereof and optionally with from one to three substituents selected from hydroxy and alkoxy, a C7-C28 alkylaryl group substituted with from one to three sulfonate moieties, from one to three pendant polycarboxylate moieties, or any combination thereof and optionally with from one to three substituents selected from hydroxy and alkoxy, a C7-C28 alkenyl group substituted with from one to three sulfonate moieties, from one to three pendant polycarboxylate moieties, or any combination thereof and optionally with from one to three substituents selected from hydroxy and alkoxy, or a C7-C28 alkenylaryl group substituted with from one to three sulfonate moieties, from one to three pendant polycarboxylate moieties, or any combination thereof and optionally with from one to three substituents selected from hydroxy and alkoxy;
- n is an integer from 1 to 8;
- AO represents, individually for each occurrence, an alkyleneoxy group selected from an ethoxy group, a propoxy group, or a butoxy group;
- and
- w is an integer from 1 to 110.
4 more elements
A surfactant mixture comprising:
- (a) a first surfactant defined by Formula II or a salt thereof,
- (b) a second surfactant defined by Formula III or a salt thereof;
- (c) a third surfactant defined by Formula IV or a salt thereof;
- and
- (d) a fourth surfactant defined by Formula V or a salt thereof,
- wherein
- A is sulfate or sulfonate;
- one of D1 and D2 is a sulfonate group and one of D1 and D2 is hydrogen;
- one of E1 and E2 is a sulfonate group and one of E1 and E2 is hydroxy;
- e is an integer from 0 to 32 and f is an integer from 0 to 32, with the proviso that the sum of e and f is from 4 to 32;
- AO represents, individually for each occurrence, an alkyleneoxy group selected from an ethoxy group, a propoxy group, or a butoxy group;
- w is an integer from 1 to 110;
- and
- p is an integer from 1 to 6.
11 more elements
A surfactant mixture comprising:
- (a) a first surfactant defined by Formula VI or a salt thereof;
- (b) a second surfactant defined by Formula VII or a salt thereof;
- wherein
- A is sulfate or sulfonate;
- one of D1 and D2 is a sulfonate group and one of D1 and D2 is hydrogen;
- one of E1 and E2 is a sulfonate group and one of E1 and E2 is hydroxy;
- and
- e is an integer from 0 to 32 and f is an integer from 0 to 32, with the proviso that the sum of e and f is from 4 to 32.
5 more elements
Dependencies are inferred from the claim text.