US5503772A
Expired / Lapsed
US
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Bimodal emulsion and its method of preparation
Assignee: Petróleos de Venezuela SA
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Filing: 1995-03-01
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Granted: 1996-04-02
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Expires: 2015-03-01
Abstract
Abstract A stable, low viscosity bimodal oil in water emulsion having an emulsifier, a continuous water phase and a discontinuous oil phase having an oil:water ratio of from about 70:30 to about 85:15 by weight, the discontinuous oil phase being characterized by two distinct oil droplet sizes D L and D S wherein D L is about 10 to 40 microns and D S is less than or equal to 5 microns, the ratio of D L /D S is greater than or equal to 4 and about 45 to 85% by weight of the oil is in oil droplet size D L .
Inventors
- 👤 Hercilio Rivas
- 👤 Gustavo Nunez
- 👤 Gerardo Sanchez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:19
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/328; B; B01; B01F; B01F23/00; B01F23/40; B01F23/41; B01F23/4105; B01F23/414; B01F23/4141; Y; Y10; Y10S; Y10S516/00; Y10S516/922; Y10S516/923; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
228 words
The method of preparing a stable, low viscosity bimodal oil in water emulsion whose viscosity does not age with time wherein the emulsion has an oil:water ratio of from about 70:30 to about 85:15 by weight wherein the discontinuous phase is characterized by viscous hydrocarbon having a viscosity over 5000 cps at 30° C. and/sec -1 comprising: (a) providing a feedstock of water free viscous hydrocarbon with a salt content less than or equal to 40 ppm; (b) preparing separately two oil in water emulsions wherein a first oil in water emulsion has a dispersed phase oil droplet size of less than 5 microns (D S ) and a second oil in water emulsion has a dispersed phase oil droplet size of from about 10 to 40 microns (D L ) and wherein the proportion of oil:water in each of the emulsions is in the range from about 70:30 to about 85:15; and (c) mixing the second emulsion with the first emulsion in a ratio of at least 5:1 so as to obtain a final oil in water emulsion with a viscosity of less than 1500 cps at 30° C. and sec -1 and a dispersed viscous material phase which exists as two identifiable and distinct droplet size distributions D L and D S wherein the ratio D L /D S is greater than or equal to 5.
Claim 2
Independent Claim
228 words
The method of preparing a stable, low viscosity bimodal oil in water emulsion whose viscosity does not age with time wherein the emulsion has an oil:water ratio of from about 70:30 to about 85:15 by weight wherein the discontinuous phase is characterized by viscous hydrocarbon having a viscosity over 5000 cps at 30° C. and/sec -1 comprising: (a) providing a feedstock of water free viscous hydrocarbon with a salt content less than or equal to 40 ppm; (b) preparing separately two oil in water emulsions wherein a first oil in water emulsion has a dispersed phase oil droplet size of less than 5 microns (D S ) and a second oil in water emulsion has a dispersed phase oil droplet size of from about 10 to 40 microns (D L ) and wherein the proportion of oil:water in each of the emulsions is in the range from about 70:30 to about 85:15; and (c) mixing the second emulsion with the first emulsion in a ratio of at least 5:1 so as to obtain a final oil in water emulsion with a viscosity of less than 1500 cps at 30° C. and sec -1 and a dispersed viscous material phase which exists as two identifiable and distinct droplet size distributions D L and D S wherein the ratio D L /D S is greater than or equal to 5.
Claim 3
Dependent Claim
57 words
A method according to claim 1 wherein D L is about 15 to 30 microns, D S is less than or equal to 3 microns, the ratio of D L /D S is greater than or equal to 10 and about 70 to 80% by weight of the oil is in oil droplet size D L .
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-04-02 | 1999-10-02 | 2000-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-02 | 2003-10-02 | 2004-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-02 | 2007-10-02 | 2008-04-02 | $7700.00 | Window Closed / Lapsed |