US4469608A
Expired / Lapsed
US
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Surfactant composition containing alkylated biphenylyl phenyl ether sulfonates
Assignee: Dow Chemical Co
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Filing: 1982-07-30
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Granted: 1984-09-04
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Expires: 2002-07-30
Abstract
Abstract The title compounds are of the formula ##STR1## wherein R is an alkyl radical of at least 6 carbon atoms and each R can be the same or different; M.sup.⊕ is hydrogen, alkali metal ion, alkaline earth metal ion or ammonium ion radical and each M.sup.⊕ can be the same or different; a, b and c are individually integers of 0 or 1 with the proviso that the Σ(a+b+c) is equal to 2 or 3; and x, y and z are individually integers of 0-2 with the proviso that Σ(x+y+z)≧1. These compounds demonstrate good tolerance to multivalent cations, such as the cations of calcium and magnesium, good resistance to hydrolysis and are useful surfactants in enhanced oil recovery processes.
Inventors
- 👤 Paul E. Hinkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:43
CPC Classifications
C; C07; C07C; C07C309/00; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
193 words
An aqueous anionic surfactant system having a relatively high tolerance to multivalent cations, the system comprising: (a) a substantially homogeneous aqueous liquid system containing at least one dissolved or dispersed petroleum sulfonate surfactant in amount which is sufficient to enable the system to displace oil when it is injected into a porous, oil-bearing subterranean rock reservoir; and (b) at least one alkylated biphenylyl phenyl ether sulfonate of the formula ##STR6## wherein R is an alkyl radical of at least 6 carbon atoms and each R can be the same or different; M.sup.⊕ is hydrogen, alkali metal ion, alkaline earth metal ion or ammonium ion radical and each M.sup.⊕ can be the same or different; a, b and c are individually integers of 0 or 1 with the proviso that the Σ(a+b+c) is equal to 2 or 3; and x, y and z are individually integers of 0-2 with the proviso that Σ(x+y+z)≧1, said alkylated biphenylyl phenyl ether sulfonate being present in an amount sufficient to improve the multivalent cation tolerance of an aqueous system consisting essentially of water and the petroleum sulfonate surfactant without significantly reducing the interfacial tension-lowering activity of the system.
Claim 2
Dependent Claim
193 words
An aqueous anionic surfactant system having a relatively high tolerance to multivalent cations, the system comprising: (a) a substantially homogeneous aqueous liquid system containing at least one dissolved or dispersed petroleum sulfonate surfactant in amount which is sufficient to enable the system to displace oil when it is injected into a porous, oil-bearing subterranean rock reservoir; and (b) at least one alkylated biphenylyl phenyl ether sulfonate of the formula ##STR6## wherein R is an alkyl radical of at least 6 carbon atoms and each R can be the same or different; M.sup.⊕ is hydrogen, alkali metal ion, alkaline earth metal ion or ammonium ion radical and each M.sup.⊕ can be the same or different; a, b and c are individually integers of 0 or 1 with the proviso that the Σ(a+b+c) is equal to 2 or 3; and x, y and z are individually integers of 0-2 with the proviso that Σ(x+y+z)≧1, said alkylated biphenylyl phenyl ether sulfonate being present in an amount sufficient to improve the multivalent cation tolerance of an aqueous system consisting essentially of water and the petroleum sulfonate surfactant without significantly reducing the interfacial tension-lowering activity of the system.
Claim 3
Dependent Claim
21 words
The composition of claim 1 where R is a linear or branched alkyl radical of 8 to about 18 carbon atoms.
Claim 4
Dependent Claim
12 words
The composition of claim 2 where M.sup.⊕ is an alkali metal ion.
Claim 5
Dependent Claim
11 words
The composition of claim 3 where Σ(x+y+z) is 1 or 2.
Claim 6
Dependent Claim
36 words
The composition of claim 1 where R is a linear or branched alkyl radical of about 10 to about 18 carbon atoms, M.sup.⊕ is an ion of sodium or potassium and Σ(x+y+z) is 1 or 2.
Claim 7
Dependent Claim
40 words
In a process for displacing oil from a porous, subterranean rock reservoir, the process comprising injecting into the reservoir an active aqueous anionic surfactant system, the improvement comprising injecting as said aqueous anionic surfactant system the system of claim 1.
Claim 8
Dependent Claim
175 words
An anionic surfactant composition comprising (a) a petroleum sulfonate surfactant in an amount which is sufficient to enable an aqueous system containing the composition to displace oil when it is injected into a porous oil-bearing subterranean rock reservoir; and (b) at least one alkylated biphenylyl phenyl ether sulfonate of the formula ##STR7## wherein R is an alkyl radical of at least 6 carbon atoms and each R can be the same or different; M.sup.⊕ is hydrogen, alkali metal ion, alkaline earth metal ion or ammonium ion radical and each M.sup.⊕ can be the same or different; a, b and c are individually integers of 0 or 1 with the proviso that the Σ(a+b+c) is equal to 2 or 3; and x, y and z are individually integers of 0-2 with the proviso that Σ(x+y+z)≧1, said alkylated biphenylyl phenyl ether sulfonate being present in an amount sufficient to improve the multivalent cation tolerance of an aqueous system consisting essentially of water and the petroleum sulfonate surfactant without significantly reducing the interfacial tension-lowering activity of the system.
Claim 9
Dependent Claim
175 words
An anionic surfactant composition comprising (a) a petroleum sulfonate surfactant in an amount which is sufficient to enable an aqueous system containing the composition to displace oil when it is injected into a porous oil-bearing subterranean rock reservoir; and (b) at least one alkylated biphenylyl phenyl ether sulfonate of the formula ##STR7## wherein R is an alkyl radical of at least 6 carbon atoms and each R can be the same or different; M.sup.⊕ is hydrogen, alkali metal ion, alkaline earth metal ion or ammonium ion radical and each M.sup.⊕ can be the same or different; a, b and c are individually integers of 0 or 1 with the proviso that the Σ(a+b+c) is equal to 2 or 3; and x, y and z are individually integers of 0-2 with the proviso that Σ(x+y+z)≧1, said alkylated biphenylyl phenyl ether sulfonate being present in an amount sufficient to improve the multivalent cation tolerance of an aqueous system consisting essentially of water and the petroleum sulfonate surfactant without significantly reducing the interfacial tension-lowering activity of the system.
Claim 10
Dependent Claim
177 words
An aqueous anionic surfactant system having a relatively high tolerance to multivalent cations, the system comprising: (a) a substantially homogeneous aqueous liquid system containing at least one dissolved or dispersed petroleum sulfonate surfactant in amount which is sufficient to spontaneously emulsify the oil present in a porous subterranean rock reservoir when the system is injected into the reservoir; and (b) at least one alkylated biphenylyl phenyl ether sulfonate of the formula ##STR8## wherein R is an alkyl radical of at least 6 carbon atoms and each R can be the same or different; M.sup.⊕ is hydrogen, alkali metal ion, alkaline earth metal ion or ammonium ion radical and each M.sup.⊕ can be the same or different; a, b and c are individually integers of 0 or 1 with the proviso that the Σ(a+b+c) is equal to 2 or 3; and x, y and z are individually integers of 0-2 with the proviso that Σ(x+y+z)≧1, said alkylated biphenylyl phenyl ether sulfonate being present in an amount sufficient to disperse or dissolve the petroleum surfactant in the aqueous system.
Claim 11
Dependent Claim
177 words
An aqueous anionic surfactant system having a relatively high tolerance to multivalent cations, the system comprising: (a) a substantially homogeneous aqueous liquid system containing at least one dissolved or dispersed petroleum sulfonate surfactant in amount which is sufficient to spontaneously emulsify the oil present in a porous subterranean rock reservoir when the system is injected into the reservoir; and (b) at least one alkylated biphenylyl phenyl ether sulfonate of the formula ##STR8## wherein R is an alkyl radical of at least 6 carbon atoms and each R can be the same or different; M.sup.⊕ is hydrogen, alkali metal ion, alkaline earth metal ion or ammonium ion radical and each M.sup.⊕ can be the same or different; a, b and c are individually integers of 0 or 1 with the proviso that the Σ(a+b+c) is equal to 2 or 3; and x, y and z are individually integers of 0-2 with the proviso that Σ(x+y+z)≧1, said alkylated biphenylyl phenyl ether sulfonate being present in an amount sufficient to disperse or dissolve the petroleum surfactant in the aqueous system.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |