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| Number | Title | Issue Date |
| 7014773 | Demulsification of emulsions by socillatory mixing The invention includes a method for demulsification of water-in-oil emulsions, oil-in-water emulsions, and mixtures of water-in-oil and oil-in-water emulsions by oscillatory mixing of the emulsions. ... | 03/21/2006 |
| 6228239 | Crude oil desalting method In one embodiment, the invention is related to a process for desalting crude oil that requires less wash water than conventional desalting methods. In the preferred embodiment of the invention, a chemical demulsifier formulation comprising an emulsion-bre... | 05/08/2001 |
| 6225357 | Polymer compositions for demulsifying crude oil Polymer compositions made by reacting a polyol with an aromatic hydrocarbon containing only a single reactive functionality have been discovered to be useful demulsifiers for crude oil compositions. The aromatic hydrocarbon should have at least one aryl g... | 05/01/2001 |
| 6153656 | Demulsification of oil and water emulsions A composition comprising an oxyalkylated phenol-aldehyde resin and an acrylic acid component wherein the ratio by weight of oxyalkylated phenol-aldehyde resin to an acrylic acid component is in the range of from about 0.2:1 to about 4:1 is disclosed. The ... | 11/28/2000 |
| 5759409 | Separation of water from crude oil and oil demulsifiers used for this purpose Water is separated from crude oil by a process in which the oil demulsifier used is a mixture of A) compounds which have demulsifying activity and are of the structure type of the (a) polyethyleneimine alkoxylate, (b) mono- or oligoamine alkoxylate, (c) alkoxy... | 06/02/1998 |
| 5693257 | Compositions and method for breaking water-in-oil emulsions Compositions of an alkylphenol-formaldehyde resin and poly(alkylene glycol) are effective at breaking water-in-oil emulsions in a liquid hydrocarbon. Preferably, the composition is employed in a crude oil desalting system.... | 12/02/1997 |
| 5525201 | Oxyalkylated phenol/formaldehyde resin for desalter applications in the refinery Industry Certain base catalyzed oxyalkylated-cardanol-alkylphenol-aldehyde resins may be utilized in refinery demulsification operations. These materials find particular utility in breaking water-in-oil emulsions resulting from the water wash of crude oils. The ma... | 06/11/1996 |
| 5505878 | Method of demulsifying water-in-oil emulsions Water-in-oil emulsions are broken by the use of adducts prepared by reacting high molecular weight polyalkylene glycol with ethylene oxide, or diglycidyl ether, or both ethylene oxide and diglycidyl ether. The adduct demulsifiers may be used alone or as a... | 04/09/1996 |
| 5472617 | Method of demulsifying crude oil and water mixtures with copolymers of acrylates or methacrylates and hydrophilic commonomers A method of demulsifying a crude oil and water composition involves adding demulsifiers made from acrylic acid/methacrylic acid copolymerized with hydrophilic monomers.... | 12/05/1995 |
| 5460750 | Phenolic resins and method for breaking crude oil emulsions A composition and method for breaking crude oil emulsions is disclosed. This composition is a branched, high-molecular weight condensation product of cardanol, an alkylphenol, and an aldehyde, which may be ethoxylated or otherwise derivatized using method... | 10/24/1995 |
| 5401439 | Oil-demulsifiers based on an alkoxylate and preparation of this alkoxylate Oil demulsifiers are based on an alkoxylate having a polydispersity of at least 1.7, and the alkoxylates are prepared using a metal alcoholate as a catalyst.... | 03/28/1995 |
| 5256305 | Method for breaking emulsions in a crude oil desalting system Method of breaking the desalter emulsion in a crude oil desalting system in which oil based demulsifiers are added to the wash water stream and mixed prior to contacting the crude oil. The method is effective for crude oils which form reverse (oil-in-wate... | 10/26/1993 |
| 5205964 | Method of breaking crude oil emulsions using ethylene carbonate adducts of alkylphenol-formaldehyde resins A method of breaking crude oil emulsions using a water-in-oil emulsion breaker obtained by the reaction, in anhydrous conditions, for at least one hour, of an alkyl substituted phenol-formaldehyde polymer having the structure: ##STR1## wherein R... | 04/27/1993 |
| 5164116 | Demulsifiers for breaking petroleum emulsions Demulsifiers which contain compounds of formula I R--O--Zn --O--(AO)x H (I) wherein R is a linear or branched, saturated or unsaturated C1-18 alkyl radical, Zn is an oligoglycosyl radical with n... | 11/17/1992 |
| 5039450 | Process for the separation of crude oil emulsions of the water-in-oil type A process for the separation of crude oil emulsions of the water-in-oil type In the novel process addition products made from certain ethylene oxide/propylene oxide block polymers and certain polyglycidyl ethers of phenol/formaldehyde condensation product... | 08/13/1991 |
| 4814394 | Polyethers obtainable by reacting alkylolated bis-(4-hydroxyphenyl)-methanes with polyalkylene oxides, and their use as oil demulsifiers Polyethers with are suitable as oil demulsifiers are obtainable by reacting (A) a polyalkylene oxide obtained from ethylene oxide and propylene oxide and containing in total from 5 to 200 alkylene oxide units with (B) an alkylolation product of a low molecular weig... | 03/21/1989 |
| 4551239 | Water based demulsifier formulation and process for its use in dewatering and desalting crude hydrocarbon oils Oil is dehydrated and/or desalted by the influence of a dewatering and desalting formulation which can be characterized as an admixture of (i) a demulsifier preferably an alkylene oxide alkyl phenol-formaldehyde condensate such as a poly ethoxylated nonyl... | 11/05/1985 |
| 4537701 | Demulsifiers for breaking crude-oil emulsions and their use Petroleum demulsifiers which contain, as the active ingredients, oxyalkylated isoalkylphenol-formaldehyde resins and oxyalkylated polyalkylenepolyamines.... | 08/27/1985 |
| 4465817 | Modified etherified phenol/aldehyde condensation products and their use for breaking petroleum emulsions The new petroleum breakers are obtained by subjecting (a) an addition reaction product which has been obtained by reacting aliphatic aldehydes with phenol in a molar ratio of 1:1 to 3:1 at temperatures of 50° to 80° C. in the presence of an alkaline cat... | 08/14/1984 |
| 4431565 | Surface-active compounds, a process for their preparation and their use The new compounds consist essentially of ethylene oxide/propylene oxide block polymer units and oxyalkyleneated alkylphenol/aldehyde resin units, which are linked by methylene groups. They are prepared by reacting a block polymer of ethylene oxide and pro... | 02/14/1984 |
| 4416754 | Compositions and process for dedusting solids-containing hydrocarbon oils Very finely divided particulate solids are removed from unconventional whole heavy petroleum crudes, heavy petroleum crude fractions, and residua, syncrudes and syncrude fractions, particularly shale oil and shale oil fractions, by the use of novel surfac... | 11/22/1983 |
| 4175054 | Use of hydrocarbon polymers in demulsification This invention relates to the use of hydrocarbon polymers or copolymers in conjunction with demulsifiers in demulsification. The use of said hydrocarbon polymers-demulsifier combination is more effective in demulsification than is achieved by the use of t... | 11/20/1979 |
| 4117031 | Crude oil demulsifiers A condensation product obtained by first preparing A. an addition product of aliphatic aldehydes and phenol in a molar ratio of about 1 : 1 to 3 : 1, at temperatures in the range of from about 50° to 80° C, in the presence of an alkaline catalyst, And separa... | 09/26/1978 |
| 4098717 | Process of demulsification employing oxyalkylated cyclic phenol-aldehyde resins Oxyalkylated cyclic phenol-aldehyde resins for example oxyalkylated cyclic tetramers; processes by which they are prepared; and method of using said oxyalkylated resins for a wide variety of uses, particularly as demulsifiers for water-in-oil type emulsio... | 07/04/1978 |
| 4089803 | Demulsification of surfactant-petroleum-water flood emulsions This invention relates to the demulsification of surfactant petroleum water flood emulsions which comprises treating such emulsions with a demulsifier in conjunction with an amine, preferably a polyalkylenepolyamine.... | 05/16/1978 |
| 4032514 | Oxyalkylated cyclic phenol-aldehyde resins and uses therefor Oxyalkylated cyclic phenol-aldehyde resins for example oxyalkylated cyclic tetramers; processes by which they are prepared; and method of using said oxyalkylated resins for a wide variety of uses, particularly as demulsifiers for water-in-oil type emulsio... | 06/28/1977 |
