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| Number | Title | Issue Date |
| 7799213 | Additives to enhance phosphorus compound removal in refinery desalting processes Reactive phosphorus species can be removed or transferred from a hydrocarbon phase to a water phase in an emulsion breaking process by using a composition that contains water-soluble hydroxyacids. Suitable water-soluble hydroxyacids include, but are not necessarily ... | 09/21/2010 |
| 7419939 | Mineral acid enhanced thermal treatment for viscosity reduction of oils (ECB-0002) The invention describes a method for decreasing the viscosity of crude oils and residuum utilizing a combination of thermal and acidic treatment. Further, the invention describes a method for making a water-in-oil emulsion, or a solids-stabilized water-in-oil emulsi... | 09/02/2008 |
| 7117722 | Method for determining viscosity of water-in-oil emulsions Method to determine the viscosity of a water-in-oil emulsion that will be formed by an oil comprising organic acids when mixed with water comprising: determining the value of the expression: η ... | 10/10/2006 |
| 6875341 | Process for enhancing the value of hydrocabonaceous natural recources A process for upgrading hydrocarbonaceous oil containing heteroatom-containing compounds where the hydrocarbonaceous oil is contacted with a solvent system that is a mixture of a major portion of a polar solvent having a dipole moment greater than about 1 debye and ... | 04/05/2005 |
| 6800193 | Mineral acid enhanced thermal treatment for viscosity reduction of oils (ECB-0002) The invention describes a method for decreasing the viscosity of crude oils and residuum utilizing a combination of thermal and acidic treatment. Further, the invention describes a method for making a water-in-oil emulsion, or a solids-stabilized water-in-oil emulsi... | 10/05/2004 |
| 6673238 | Acidic petroleum oil treatment A process for hydrotreating acidic compounds of an acidic petroleum oil is disclosed. The process includes contacting the acidic petroleum oil with a hydrogen donor solvent to thereby produce a treated petroleum oil. The process can further include contac... | 01/06/2004 |
| 6544411 | Viscosity reduction of oils by sonic treatment The invention describes a method for decreasing the viscosity of crude oils and residuum utilizing a combination of acid and sonic treatment.... | 04/08/2003 |
| 6102379 | Torsion springs with visco-elastic damping A metal spring with embedded constrained layer damping provides effective damping of a supported load. A continuous load bearing tube is provided with an inner diameter and an outer diameter with a plurality of constraining layer tube sections concentric ... | 08/15/2000 |
| 6048904 | Branched alkyl-aromatic sulfonic acid dispersants for solublizing asphaltenes in petroleum oils The present invention is an asphaltene dispersant containing an aromatic, a sulfonic acid head, and an alkyl tail containing 16 carbons or more and at least one branch of a methyl or longer alkyl. Preferably, the aromatic is a fused two ring aromatic and ... | 04/11/2000 |
| 5925233 | Use of alkanesulfonic acids as asphaltene-dispersing agents The present invention relates to the use of secondary alkanesulphonic acids as asphaltene dispersing agent in crude oils and products derived therefrom, wherein a chain length of 8 to 22 C atoms is present. The secondary alkanesulfonic acids are employed ... | 07/20/1999 |
| 5282959 | Method for the extraction of iron from liquid hydrocarbons A method of extracting iron species from a liquid hydrocarbon medium comprising adding to the medium a composition comprised of an aminocarboxylic acid, methoxypropylamine and a solvent selected from the group consisting of 2-ethylhexanol, cresylic acid, ... | 02/01/1994 |
| 5152886 | Method for improving heavy crude oils by reducing the asphaltene content of crude oils and oil-containing tar sands A process for reducing asphaltene content of crude oil and oil-containing materials to improve rheological properties of crude oils enhancing the water-extractabilities of sulphur and metals contained in them. The process employs the cold cracking effect ... | 10/06/1992 |
| 5080779 | Methods for removing iron from crude oil in a two-stage desalting system Methods of diminishing the content of soluble and insoluble forms of iron from crude are disclosed. Crude and water soluble chelant are mixed prior to addition of wash water. After wash water addition, an emulsion is formed. After resolution of the emulsi... | 01/14/1992 |
| 4992164 | Method of charge neutralization using chelants A method of neutralizing chloride ions present in a hydrocarbon medium during processing in a petroleum refinery. Nitrilotriacetic acid or its salt form is injected into the crude charge upstream of the preheat unit. Chloride levels are reduced in this wa... | 02/12/1991 |
| 4988433 | Demetalation of hydrocarbonaceous feedstocks using monobasic carboxylic acids and salts thereof Monobasic carboxylic acids or salts thereof are used to remove metals, particularly calcium and iron, from hydrocarbonaceous feedstocks. An aqueous solution of the acid is used to extract the metals from the feedstock prior to processing. Acetic acid is t... | 01/29/1991 |
| 4960508 | Two-step heterocyclic nitrogen extraction from petroleum oils A process for the removal of basic heterocyclic nitrogen compounds from petroleum oils which comprises: (a) contacting said petroleum oils containing basic heterocyclic nitrogen compounds with an aqueous solution of a first solvent comprising concentrated... | 10/02/1990 |
| 4853110 | Method for separating arsenic and/or selenium from shale oil A process for removing arsenic and/or selenium from carbonaceous materials. The arsenic and/or selenium are separated by reaction with a metal oxide and/or metal sulfide which is itself derived from a metal complex, and organometallic compound and/or a me... | 08/01/1989 |
| 4749472 | Two step heterocyclic nitrogen extraction from petroleum oils The instant invention discloses a method of removing heterocyclic basic nitrogen compounds from petroleum oils which comprises first enhancing the concentration of the heterocyclic basic nitrogen compounds in a portion of the petroleum oil and then extrac... | 06/07/1988 |
| 4746420 | Process for upgrading diesel oils A process for upgrading diesel oil comprising the steps of: (1) reacting the diesel oil with a nitrogenous treating agent; (2) contacting the diesel oil from step (1) above with (a) a primary solvent selected from the group consisting of organic solvents having a d... | 05/24/1988 |
| 4743360 | Process for removing basic nitrogen compounds from gas oils A process for removing the basic nitrogen compounds from gas oils comprises treating the gas oils with a homogeneous solvent mixture comprising a diluted aqueous acid solution and an alcohol having from 1 to 6 carbon atoms, the volume ratio of alcohol to ... | 05/10/1988 |
| 4731174 | Process for cracking nitrogen-containing feedstocks Hydrocarbon feedstocks containing relatively high levels of nitrogen contaminants are converted to products of lower average molecular weight by first mixing the feedstock with a dicarboxylic acid such as oxalic acid and then contacting the resultant mixt... | 03/15/1988 |
| 4711713 | Process for enhancing the cetane number and color of diesel fuel A process for enhancement of the cetane number of a diesel fuel which in one embodiment comprises: (1) treating a diesel oil with a nitrogenous treating agent in a nitrogen amount, equivalent on a 100% nitric acid basis, to about 10 weight percent or less... | 12/08/1987 |
| 4623444 | Upgrading shale oil by a combination process A method for reducing the nitrogen content of shale oil is disclosed. The method comprises distilling shale oil to form a distillate containing lighter shale oil compounds and a residue containing heavier compounds. Nitrogen-containing compounds are extra... | 11/18/1986 |
| 4605489 | Upgrading shale oil by a combination process A method for reducing the nitrogen content of shale oil is disclosed. The method comprises selectively extracting nitrogen-containing compounds to form a nitrogen-lean raffinate and a nitrogen-rich extract. The nitrogen-lean raffinate is distilled to form... | 08/12/1986 |
| 4287051 | Disposition of a high nitrogen content oil stream A method of denitrogenating viscous oils containing a relatively high content of nitrogenous compounds and of disposing of a resulting high nitrogen content oil stream, characterized by forming a raw oil stream and a first viscous bottoms stream that woul... | 09/01/1981 |
| 4272361 | Method for reducing the nitrogen content of shale oil A method is disclosed for reducing the nitrogen content of shale oil by removing nitrogen-containing compounds from the shale oil. The shale oil containing nitrogen-containing compounds is extracted with a sufficient amount of selective solvent which is s... | 06/09/1981 |
| 4271009 | Method for reducing the nitrogen content of shale oil Methods are disclosed for reducing the nitrogen content of shale oil by selectively removing therefrom nitrogen-containing compounds. The nitrogen content of shale oil is reduced by a process comprising lowering the viscosity of the shale oil and then con... | 06/02/1981 |
