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| Number | Title | Issue Date |
| 7396450 | Method of reducing amount of peroxides, reducing fuel sediments and enhancing fuel system elastomer durability, fuel stability and fuel color durability A reduction in the formation and presence of peroxides in low sulfur diesel fuels is obtained through the combination of those fuels with an organic nitrate combustion improver. The reduction in the amount of peroxides means that the fuel system elastomers will be m... | 07/08/2008 |
| 7077950 | Continuous process for the removal of water from a hydrocarbon stream Process for the continuous drying of a hydrocarbon stream at a temperature being effective in drying the stream with an ionic liquid drying agent comprising a salt of sulphuric acid being in liquid or melted form at the drying temperature. ... | 07/18/2006 |
| 6627069 | Method for reducing the naphthenic acid content of crude oil and its fractions The present invention relates to a process for reducing naphthenic acid content of crude oils and its fractions in the essential absence of oxygen and in the presence of an aqueous base selected from Group IA and IIA hydroxides and ammonium hydroxide and ... | 09/30/2003 |
| 6579442 | Methods and compositions for inhibiting polymerization of vinyl monomers Methods and compositions for inhibiting the polymerization of vinyl monomers are disclosed. Combinations of nitroxyl compounds and aliphatic amines are effective at inhibiting the polymerization of vinyl monomers under both processing and storage conditio... | 06/17/2003 |
| 6531103 | Process for removing sulfur compounds from gas and liquid hydrocarbon streams The present invention provides a process for removing sulfur compounds including sulfur in the (-2) oxidation state such as mercaptans, dialkyl sulfides, carbonyl sulfide, hydrogen sulfide, thiophenes and benzothiophenes, from liquid or gas feed streams, ... | 03/11/2003 |
| 6483003 | Removal of impurities from a hydrocarbon component or fraction A process for removing impurities from a hydrocarbon component or fraction comprises mixing, in a liquid-liquid extraction step, an impurity-containing liquid hydrocarbon component or fraction, as an impure liquid hydrocarbon feedstock, with an acetonitri... | 11/19/2002 |
| 6409910 | Process for treating gas or liquids that are obtained from catalytic reforming The invention relates to a process for eliminating halogenated compounds that are contained in a gas or a liquid that comprises hydrogen and unsaturated hydrocarbons, in which the gas or the liquid is successively brought into contact with: at least one c... | 06/25/2002 |
| 6372124 | Removal of impurities from hydrocarbon streams The invention provides a method of purifying hydrocarbon streams from metallic impurities which comprises passing the stream through media comprising alumina with relatively minor amounts of calcia and magnesia.... | 04/16/2002 |
| 6320090 | Method of removing contaminants from petroleum distillates Polynuclear aromatic hydrocarbons (PAHs) and other contaminants are removed from petroleum distillates by mixing a solvent with petroleum distillate to extract the contaminants therefrom. The solvent is recovered and distilled to separate the contaminants... | 11/20/2001 |
| 5921911 | Methods of inhibiting foam formation in alkanolamine systems A method for inhibiting foam formation in a stripper of an amine unit is disclosed. The addition of non-foaming demulsifiers to the liquid, compressed hydrocarbon stream entering or the aqueous organic amine stream entering or exiting an absorber of an am... | 07/13/1999 |
| 5847209 | Process for recovery of solid and reusable urea from the urea adduction process A process for recovery of solid and reusable urea from the urea adduction process. Refinery streams are subjected to a step of urea adduction for removal of unwanted branched products, aromatics and sulphur. The adduct is purified, dried and then subjecte... | 12/08/1998 |
| 5824214 | Method for hydrotreating and upgrading heavy crude oil during production Heavy crude oil containing at least 1% by weight water is hydrotreated and upgraded while being produced downhole in a production well. During production the heavy crude oil containing water is subjected to sonic energy at a low frequency of 400 Hz to 10 ... | 10/20/1998 |
| 5608112 | Process for reducing organic pollutants Nitrogen-containing substituents of aliphatic or aromatic compounds can be reduced by treatment with a reagent comprising (i) at least one complex of a transition metal of group 4 or 5 with a multidentate or unidentate organic or inorganic ligand and (ii)... | 03/04/1997 |
| 5476988 | Settling aids for solids in hydrocarbons A method for accelerating the settling of finely divided solids in hydrocarbon fluids comprising adding to the hydrocarbon a sufficient settling amount of quaternary fatty ammonium compound. Preferably, the hydrocarbon is a fluid catalytic cracker slurry ... | 12/19/1995 |
| 5458765 | Process of drying and removing solids from waste oil This invention is a process comprising several steps for removing solid contaminants and for assisting in the dewatering of liquid hydrocarbons. For the purposes of this invention, solid contaminants include dissolved salts, either in the oil or in the em... | 10/17/1995 |
| 5417845 | Use of decahydro pyrazino [2,3-b] pyrazine for the reduction of the proportion of free or combined hydrogen sulphide present in a fluid Process and use of decahydro pyrazino [2,3-b] pyrazine for the reduction of the proportion of free or combined hydrogen sulphide present in a fluid.... | 05/23/1995 |
| 5354453 | Removal of H2 S hydrocarbon liquid Reactive S (e.g. H2 S and mercaptans) in petroleum liquid are scavenged by the use of oil soluble trialkyl hexahydro triazines wherein at least one alkyl group, and preferably all three, contain from 7 to 20 carbon atoms.... | 10/11/1994 |
| 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 |
| 5264114 | Hydrocarbon treating process Cracked hydrocarbon gases are treated to remove contaminating compounds that react in caustic wash to form the reaction products which cause equipment fouling. The treating of the cracked hydrocarbon gases includes the contacting of a cracked hydrocarbon ... | 11/23/1993 |
| 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 |
| 5114566 | Crude oil desalting process A composition and method for improving the removal of corrosive contaminants from crude oil within the desalter in a petroleum refinery. An amine is added to the wash water or to the crude oil prior to processing in the desalter. The amine maximizes the y... | 05/19/1992 |
| 5015364 | Method and means for refinery gas plant operation A process is disclosed for operating a refinery gas plant such as the unsaturated gas plant of a catalytic hydrocarbon conversion process that results in a reduction of the corrosive effect of acid gases on the gas plant vessels and equipment. The process... | 05/14/1991 |
| 4992210 | Crude oil desalting process A composition and method for improving the removal of corrosive contaminants from crude oil within the desalter in a petroleum refinery. An amine is added to the wash water or to the crude oil prior to processing in the desalter. The amine maximizes the y... | 02/12/1991 |
| 4952301 | Method of inhibiting fouling in caustic scrubber systems A method for inhibiting the formation of polymeric based fouling deposits normally formed during the caustic washing of hydrocarbons is disclosed. The method comprises adding an effective amount for the purpose of an ethylenediamine compound (e.g., ethyle... | 08/28/1990 |
| 4895641 | Method of desalting crude oil The salt content of a heavy crude oil is reduced by a method which comprises the steps of (a) mixing 70 to 98% by volume of a heavy crude 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 aque... | 01/23/1990 |
| 4752381 | Upgrading petroleum and petroleum fractions A method of neutralizing the organic acidity in petroleum and petroleum fractions to produce a neutralization number less than 1.0 whereby they are rendered suitable as lube oil feed stocks which comprises treating said heavy gas oils with a neutralizing ... | 06/21/1988 |
| 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 |
| 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 |
| 4705622 | Process for dedusting shale-oil Disclosed is a process for removing entrained mineral matter particles from shale-oil by contacting the shale-oil with an aqueous ammonium or phosphonium salt solution having a pH of about 0.5 to 8 and at a temperature from about 0° C. to 100° C.... | 11/10/1987 |
| 4705619 | Hydroprocessing with self-promoted molybdenum and tungsten sulfide catalyst Hydrocarbon feeds are upgraded by contacting same, at elevated temperature and in the presence of hydrogen, with a self-promoted catalyst prepared by heating one or more water soluble catalyst precursors in a non-oxidizing atmosphere in the presence of su... | 11/10/1987 |
| 4673489 | Method for prevention of fouling in a basic solution by addition of specific nitrogen compounds The present invention is directed to the use of hydroxylamine, its acid salts or mixtures thereof to prevent fouling during the basic washing of hydrocarbons containing oxygenated compounds. More specifically, oxygenated compounds such as carbonyl contain... | 06/16/1987 |
| 4668376 | Supported, Mn sulfide promoted Mo and W sulfide hydroprocessing catalysts and uses thereof This invention relates to the preparation and use of supported, manganese sulfide promoted molybdenum and tungsten sulfide catalysts useful for hydroprocessing processes, particularly hydrotreating. These catalysts are prepared by heating a composite of s... | 05/26/1987 |
| 4663023 | Hydrotreating with self-promoted molybdenum and tungsten sulfide catalyst Hydrocarbon feeds are upgraded by contacting same, at elevated temperature and in the presence of hydrogen, with a self-promoted catalyst prepared by heating one or more water soluble catalyst precursors in a non-oxidizing atmosphere in the presence of su... | 05/05/1987 |
| 4650563 | Transition metal sulfide promoted molybdenum or tungsten sulfide catalysts and their uses for hydroprocessing Hydrocarbon feeds are upgraded by contacting a feed, at elevated temperature and in the presence of hydrogen, with a self-promoted catalyst prepared by heating one or more catalyst precursors under oxygen-free conditions in the presence of sulfur at a tem... | 03/17/1987 |
| 4643820 | Process for enhancing the cetane number 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... | 02/17/1987 |
| 4634519 | Process for removing naphthenic acids from petroleum distillates Process for extracting naphthenic acids from petroleum distillates having ASTM acid numbers of at least 0.2. The process uses a solvent system comprising liquid alkanols, water, and ammonia in certain critical ratios, which facilitates the selective extra... | 01/06/1987 |
| 4613726 | Process for removing nickel, aluminum and chlorine from olefin oligomers Nickel, aluminum and chlorine derivatives which remain dissolved in olefin oligomers, after oligomerization in the presence of a nickel, aluminum, and chlorine-containing catalysts, are removed by successive treatments with: (a) anhydrous ammonia, (b) an ... | 09/23/1986 |
| 4466946 | CO2 Removal from high CO2 content hydrocarbon containing streams Carbon dioxide is removed from CO2 and hydrocarbon containing gaseous streams. In the instance where the hydrocarbons and CO2 are such that hydrocarbons would condense out during CO2 removal, the gas stream is treated in o... | 08/21/1984 |
| 4457836 | Supported, non (metal-promoted) carbon-containing molybdenum sulfide catalysts for selective nitrogen removal A process for selectively removing nitrogen from petroleum distillate feedstocks, notably lube oil distillates or lube base stocks without significant desulfurization of said petroleum distillate feedstocks, especially lube oil distillates or lube base st... | 07/03/1984 |
| 4424118 | Method for removing contaminants from hydrocarbonaceous fluid The present invention relates to a method for removing contaminants such as arsenic from a hydrocarbonaceous fluid which consists essentially of the crude, or a fraction thereof, obtained from oil shale, solid coal, or tar sands by non-catalytically heat ... | 01/03/1984 |
