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| Number | Title | Issue Date |
| 7566744 | Environmentally friendly demulsifiers for crude oil emulsions The present invention provides environmentally friendly demulsifiers for the break down of petroleum oil applications. The demulsification formulations of the present invention are biodegradable and are low in toxicity. The demulsifiers include a poly(tetramethylene... | 07/28/2009 |
| 7431845 | Method of clarifying oily waste water A method of clarifying oily waste water comprising adding to the waste water an effective clarifying amount of one or more demulsifiers selected from the group consisting of dendritic polyamines, dendritic polyamidoamines and hyperbranched polyethyleneimines and the... | 10/07/2008 |
| 7247606 | Branched reaction products A compound of formula: wherein each R group independently is C6-C10 arylene group, a straight or branched chain C2-C°alkylene group optionally containing an arylene gr... | 07/24/2007 |
| 6977048 | Method of recycling water contaminated oil based drilling fluid A method for recycling an invert emulsion based drilling fluid, in which the invert emulsion based drilling fluid includes an oil component and an aqueous component. The method includes: mixing the invert emulsion drilling fluid with a emulsion clearing agent, where... | 12/20/2005 |
| 6881349 | Method for recycling of oil based drilling fluid contaminated with water and water contaminated with oil based drilling fluid A mobile apparatus and method for recycling an invert emulsion based drilling fluid, in which the invert emulsion based drilling fluid includes an oleaginous component and an aqueous component. The apparatus includes an emulsion breaking tank, a water treatment tank... | 04/19/2005 |
| 6703428 | Aromatic aldehyde resins and their use as emulsion breakers Resins obtainable from compounds of formula 1 ##STR1## in which the substituents R2 and HNR1 can be in the ortho, meta or para position relative to one another, and R1 has the same meaning as R2, or has the meani... | 03/09/2004 |
| 6646016 | Aromatic aldehyde resins and their use as emulsion breakers Resins useful in methods of breaking oil-water emulsions. The resins obtained by reacting a compound of formula 1 with an aldehyde and alkoxylating, in any order: ##STR1## wherein X is --NHR1 ; --COOH; or --CONHR2 ; and is ortho-... | 11/11/2003 |
| 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 |
| 6172123 | Demulsifiers for separating oil and water mixtures A method for preventing or breaking oil and water mixtures comprising adding thereto a branched reaction product of A) at least one linking compound of formula I R1 (X)3 (I) wherein each X group is a halogen atom or one X group is a halogen a... | 01/09/2001 |
| 6130258 | Polyvalent metal cations in combination with dithiocarbamic acid compositions as board spectrum demulsifiers A method for resolving an oil-and-water emulsion is disclosed. The method comprises adding to the emulsion (1) if the emulsion does not contain a desirably high concentration of polyvalent metal cations of at least one part per million by weight, an amoun... | 10/10/2000 |
| 5981687 | 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... | 11/09/1999 |
| 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 |
| 5753598 | Lubricating oil compositions or concentrates therefor providing enhanced water-shedding properties The combination (mixture and/or reaction product) of an epoxy based demulsifier and a heterocyclic compound, e.g. dimercaptoth-iadiazole, has been found to exhibit synergistic activity in marine oil formulations especially Trunk Piston Oils. The combinati... | 05/19/1998 |
| 5614101 | Methods for treating mud wash emulsions The present invention provides for methods for treating bottoms sludge and water-oil interphase emulsions present in a containment vessel by injecting into the sludge an effective resolving amount of an oil-based demuislfier. In a preferred embodiment, th... | 03/25/1997 |
| 5523000 | Improved pH driven method for wastewater separation using an amphoteric dicarboxylate and a cationic destabilizer composition Improved separation of emulsified hydrophobic organic soils can be obtained from aqueous effluents using an amphoteric dicarboxylate surfactant material in combination with cationic destabilizer or flocculent materials. Such a treatment in combination wit... | 06/04/1996 |
| 5445765 | Petroleum emulsion breakers Petroleum emulsion breakers based on alkoxylated polyethyleneimines are obtained by reacting polyethyleneimine with a molecular weight of 2,500-35,000 with 5-40 moles each of propylene oxide and ethylene oxide per ethyleneimine unit in the polyethyleneimi... | 08/29/1995 |
| 5421993 | Process of inhibiting corrosion, demulsifying and/or depressing the pour point of crude oil The invention relates to the use of oxyalkylated fatty amines and fatty amines of the formula (I) ##STR1## in which A is a radical of the formula (II)-(V) ##STR2## in which R is C6 -C22 -alkyl, x is a number from 5 to 40, y... | 06/06/1995 |
| 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 |
| 5300227 | Bioremediation of hydrocarbon contaminated soils and water Simply stated, the present invention employs a surfactant system for treatment of hydrocarbon contaminated soils and water that increases the interface between the hydrocarbon contaminant, microbial nutrients and microflora, and also stimulates the propag... | 04/05/1994 |
| 5176847 | Demulsifying composition Water-in-oil emulsions of the type found in petroleum oil refineries and other industrial operations are demulsified by adding thereto an effective amount of a mixture of these components comprising 1. Tannin or amino methylated tannin 2. A cationic polymer or... | 01/05/1993 |
| 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 |
| 5154857 | Demulsifying and antifouling agent suitable for separating possibly emulsified water/hydrocarbon mixtures The invention relates to a water-soluble demulsifying and antifouling agent capable of separating possibly emulsified water/hydrocarbon mixtures, and particularly water/crude petroleum mixtures containing suspended matter. Said agent comprises from 10 to 60 pe... | 10/13/1992 |
| 5102580 | Demulsifier compositions and demulsifying use thereof A blend of a first block oxyalkylated copolymer of a bishydroxyalkyl ether and a second block oxyalkylated copolymer of 2-amino-2-hydroxymethyl 1,3-propanediol partially cross-linked with a vinyl polymer in the pH reducing presence of an alkylsulfonic aci... | 04/07/1992 |
| 5026483 | Methods for treating hydrocarbon recovery operations and industrial waters Certain dithiocarbamates are used as reverse demulsifiers, corrosion and scale inhibitors, flocculants, biocides, flotation aids, water clarifiers, interface control agents and antifoaming agents.... | 06/25/1991 |
| 5013452 | Resolution of emulsions formed in the production of pharmaceuticals A method for resolving emulsions produced in preparation of pharmaceuticals by fermentation and in other such bioprocesses is disclosed. The method comprises adding an effective amount of a demulsifier to an emulsion containing fermentation product that i... | 05/07/1991 |
| 5013451 | Methods for treating hydrocarbon recovery operations and industrial waters Certain dithiocarbamates are used as reverse demulsifiers, corrosion and scale inhibitors, flocculants, biocides, flotation aids, water clarifiers, interface control agents and antifoaming agents.... | 05/07/1991 |
| 4885111 | Branched, quaternary polyoxyalkylene copolyesters, a process for their preparation, and their use Branched, quaternary polyoxyalkylene copolyesters are described which are prepared by esterifying an oxyalkylated primary fatty amine and an at least trihydric oxyalkylated alkanol or an oxyalkylated polyamine using a dicarboxylic acid or a dicarboxylic a... | 12/05/1989 |
| 4885110 | Branched polyoxyalkylene copolyesters, a process for their preparation, and their use Branched polyoxyalkylene copolyesters are described which are prepared by esterifying an oxyalkylated primary fatty amine and an at least trihydric oxyalkylated alkanol or an oxyalkylated polyamine using a dicarboxylic acid or a dicarboxylic anhydride wit... | 12/05/1989 |
| 4877842 | Demulsifier compositions and methods of preparation and use thereof A composition comprising the reaction product resulting from subjecting to grafting and esterification reaction conditions a mixture comprising a polyoxyalkylene amine and a vinyl monomer. The mixture is substantially free of copolymers derived from a pol... | 10/31/1989 |
| 4826625 | Methods for treating hydrocarbon recovery operations and industrial waters Use of nitrogen-containing tridithiocarbamic acid compositions as reverse demulsifiers.... | 05/02/1989 |
| 4689177 | Use of tridithiocarbamic acid compositions as demulsifiers Use of nitrogen-containing tridithiocarbamic acid compositions as reverse demulsifiers.... | 08/25/1987 |
| 4626379 | Demulsifier composition and method of use thereof Novel demulsifier compositions, their method of preparation and use as demulsifiers are described. The novel demulsifiers comprise the partially condensed reaction product of a blend of at least two oxyalkylated materials with a vinyl monomer. The demulsi... | 12/02/1986 |
| 4569785 | Thioureylenes and uses thereof This invention relates to Thioureylene prepared by reacting an oxyalkylated polyamine with thiourea and to uses of such Thioureylene for example in removing oils, solids, and combinations thereof from aqueous systems, etc.... | 02/11/1986 |
| 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 |
| 4548707 | Use of high ethoxylate low carbon atom amines for simultaneous removal of sulfonate surfactants and water from recovered crude oil This invention relates to secondary or tertiary recovery processes for the recovery of oil from subterranean oil-bearing reservoirs. More particularly, this invention relates to an improved method for the recovery of petroleum from underground reservoirs,... | 10/22/1985 |
| 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 |
| 4502977 | Demulsifier composition and method of use thereof Novel demulsifier compositions, their method of preparation and use as demulsifiers are described. The novel demulsifiers comprise the partially condensed reaction product of a blend of at least two oxyalkylated materials with a vinyl monomer. The demulsi... | 03/05/1985 |
| 4396530 | Mineral acid demulsification of surfactant-containing emulsion Oil is recovered simultaneously from all phases of a surfactant-produced crude oil or simultaneously from the middle and upper phases of such an emulsion by acidizing the emulsion with a mineral acid, preferably nitric acid. Following the acidation step, ... | 08/02/1983 |
| 4396499 | Demulsification of bitumen emulsions using water soluble salts of polymers A process for recovering bitumen from oil-in-water (O/W) emulsions is disclosed wherein water soluble demulsifiers are used. These demulsifiers are water soluble salts of polymers prepared by the reaction between certain polyoxyalkylene diamines with diep... | 08/02/1983 |
| 4382852 | Demulsification of bitumen emulsions using cationic polymers A process for recovering bitumen from oil-in-water (O/W) emulsions is disclosed wherein water soluble demulsifiers are used. These demulsifiers are cationic polymers of equal to or greater than about 2,000 molecular weight obtained by the reaction of poly... | 05/10/1983 |
