Patent JPS592344U successfully refreshed from Google Patents.
EP0156486A2
Expired / Lapsed
EP
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Preparation of emulsions
Assignee: BP PLC
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Filing: 1985-02-14
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Granted: —
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Expires: 2005-02-14
Abstract
Abstract An HIPR (high internal phase ratio) emulsion of oil in water is prepared by directly mixing 70 to 98% by volume of a viscous oil having a viscosity in the range 200 to 250,000 mPa.s at the mixing temperature with 30 to 2% by volume of an aqueous solution of an emulsifying surfactant or an alkali, percentages being expressed as percentages by volume of the total mixture. Mixing is effected under low shear conditions in the range 10 to 1,000 reciprocal seconds in such manner that an emulsion is formed comprising highly distorted oil droplets having mean droplet diameters in the range 2 to 50 micron separated by thin interfacial films. The emulsions are much less viscous than the oils from which they are prepared and may, optionally after dilution, be pumped through a pipeline. Viscous crude oils may be transported by this method.
Inventors
- 👤 Maria Luisa Chirinos
- 👤 Alistair Stewart Taylor
- 👤 Spencer Edwin Taylor
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 11:34
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/328; B; B01; B01F; B01F23/00; B01F23/40; B01F23/41; B01F23/4105; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
A method for the preparation of an HIPR emulsion of oil in water which method comprises directly mixing 70 to 98X by volume of a viscous oil with 30 to 2% by volume of an aqueous solution of an emulsifying surfactant or an alkali, percentages being expressed as percentages by volume of the total mixture; characterised by the fact that the oil has a viscosity in the range 200 to 250,000 mPa.s at the mixing temperature and mixing is effected under low shear conditions in the range 10 to 1,000 reciprocal seconds in such manner that an emulsion is formed comprising highly distorted oil droplets having mean droplet diameters in the range 2 to 50 micron separated by thin interfacial films.
Claim 2
Independent Claim
121 words
A method for the preparation of an HIPR emulsion of oil in water which method comprises directly mixing 70 to 98X by volume of a viscous oil with 30 to 2% by volume of an aqueous solution of an emulsifying surfactant or an alkali, percentages being expressed as percentages by volume of the total mixture; characterised by the fact that the oil has a viscosity in the range 200 to 250,000 mPa.s at the mixing temperature and mixing is effected under low shear conditions in the range 10 to 1,000 reciprocal seconds in such manner that an emulsion is formed comprising highly distorted oil droplets having mean droplet diameters in the range 2 to 50 micron separated by thin interfacial films.
Claim 3
Dependent Claim
27 words
A method according to claim 1 wherein the feedstock comprises 80X to 90% by volume of oil, expressed as a percentage by volume of the total mixture.
Claim 4
Independent Claim
25 words
A method according to any of the preceding claims wherein mixing is effected under low shear conditions in the range 50 to 250 reciprocal seconds.
Claim 5
Independent Claim
23 words
A method according to any of the preceding claims wherein the viscous oil has a viscosity in the range 2,000 to 250,000 mPa.s.
Claim 6
Independent Claim
82 words
A method according to any of the preceding claims wherein the surfactant is a non-ionic surfactant the molecules of which have a hydrocarbyl, hydrophobic group (which may be substituted) having a chain length in the range 8 to 18 carbon atoms, and one or more polyoxyethylene groups containing 9 to 100 ethylene oxide units in total, the hydrophilic group or groups containing 30 or more ethylene oxide units when the hydrophobic group has a chain length of 15 carbon atoms or greater.
Claim 7
Dependent Claim
14 words
A method according to claim 5 wherein the surfactant is an ethoxylated alkyl phenol.
Claim 8
Independent Claim
17 words
A method according to any of claims 1 to 4 wherein the surfactant is an ionic surfactant.
Claim 9
Dependent Claim
22 words
A method according to claim 7 characterised by the fact that a hydrophilic polymer is employed in addition to the ionic surfactant.
Claim 10
Dependent Claim
21 words
A method according to claim 8 wherein the hydrophilic polymer is polyvinyl alcohol, polyethylene oxide, polyvinyl pyrrolidone or a polysaccharide biopolymer.
Claim 11
Independent Claim
38 words
A method for the transportation of a viscous oil characterised by the fact that an HIPR emulsion of the oil-in-water type is prepared by a method according to any of the preceding claims, and pumped through a pipeline.
Claim 12
Dependent Claim
32 words
A method according to claim 10 characterised by the fact that the HIPR emulsion is diluted with an aqueous phase to a desired viscosity and/or concentration before being pumped through the pipeline.
References Cited (Backward Citations)
No citation records indexed.
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