§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US4597879A Expired / Lapsed US ⏱️ 0.0 years remaining

Micellar slug for oil recovery

Assignee: Lion Corp
•
Filing: 1983-03-31
•
Granted: 1986-07-01
•
Expires: 2003-03-31
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A micellar slug for use in the recovery of oil, the slug containing a hydrocarbon, an aqueous medium, a surfactant, and a cosurfactant. The surfactant contains as an essential component an internal olefin sulfonate having 10 to 26 carbon atoms, a hydroxyalkane sulfonate content of not less than about 40% by weight and a disulfonate content of not more than 20% by weight and said internal olefin sulfonate being desired from the sulfonation of an internal olefin having the general formula: R--CH═CH--R' wherein R is a straight- or branched-chain alkyl group having 4 to 23 carbon atoms, R' is a straight- or branched-chain alkyl group having 1 to 12 carbon atoms provided that the total carbon atom numbers of R and R' is 8 to 24 and 50% by weight or more of the internal olefins is that having R' with 1 to 4 carbon atoms. This micellar slug has an excellent capability for decreasing an interfacial tension between oil and water and an excellent salinity tolerance and hard-water resistance. Furthermore, the micro-emulsion can be formed from this micellar slug in a wide composition range.

Inventors

  • 👤 Hiroshi Morita
  • 👤 Yasuyuki Kawada
  • 👤 Junichi Yamada
  • 👤 Toshiyuki Ukigai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 16:21
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936; Y10S507/937; Y10S507/938

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 188 words
A micellar slug for use in the recovery of oil, said slug consisting essentially of about 2% to 90% by weight of a hydrocarbon, about 4% to 90% by weight of an aqueous medium containing about 1% to about 15% by weight of an inorganic salt, about 1% to 30% by weight of a surfactant, and about 0.1% to 20% by weight of a cosurfactant, said surfactant containing, as an essential component, an internal olefin sulfonate having 10 to 26 carbon atoms, a hydroxyalkane sulfonate content of not less than about 40% by weight and a disulfonate content of not more than 20% by weight and said internal olefin sulfonate being derived from the sulfonation of an internal olefin having the general formula: R-CH═CH-R' wherein R is a straight- or branched-chain alkyl group having 4 to 23 carbon atoms, R' is a straight- or branched-chain alkyl group having 1 to 12 carbon atoms provided that the total carbon atom numbers of R and R' is 8 to 24 and 50% by weight or more of the internal olefins is that having R' with 1 to 4 carbon atoms.
Claim 2
Dependent Claim 188 words
A micellar slug for use in the recovery of oil, said slug consisting essentially of about 2% to 90% by weight of a hydrocarbon, about 4% to 90% by weight of an aqueous medium containing about 1% to about 15% by weight of an inorganic salt, about 1% to 30% by weight of a surfactant, and about 0.1% to 20% by weight of a cosurfactant, said surfactant containing, as an essential component, an internal olefin sulfonate having 10 to 26 carbon atoms, a hydroxyalkane sulfonate content of not less than about 40% by weight and a disulfonate content of not more than 20% by weight and said internal olefin sulfonate being derived from the sulfonation of an internal olefin having the general formula: R-CH═CH-R' wherein R is a straight- or branched-chain alkyl group having 4 to 23 carbon atoms, R' is a straight- or branched-chain alkyl group having 1 to 12 carbon atoms provided that the total carbon atom numbers of R and R' is 8 to 24 and 50% by weight or more of the internal olefins is that having R' with 1 to 4 carbon atoms.
Claim 3
Dependent Claim 21 words
A micellar slug as claimed in claim 1, wherein said surfactant is an internal olefin sulfonate having to 24 carbon atoms.
Claim 4
Dependent Claim 79 words
A micellar slug as claimed in claim 1, wherein said cosurfactant has the general formula: R"O(CH.sub.2 CH.sub.2 O).sub.n H wherern n is a number of from 0 to about 4 and R" is an alkyl or alkenyl group having 4 to 8 carbon atoms when n is zero and an alkyl or group having 6 to 15 carbon atoms, a phenyl group, or an alkenyl, or alkylphenyl group having 7 to 16 carbon atoms when n is not zero.

References Cited (Backward Citations)

US3376336A Cited
US3415753A Cited
US3428654A Cited
US3506070A Cited
US3508611A Cited
US3536136A Cited
US3867317A Cited
US3808156A Cited
US4064076A Cited
US3990515A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-06-30 1989-12-30 1990-07-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-06-30 1993-12-30 1994-07-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-06-30 1997-12-30 1998-07-01 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag