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WO/2004/007644A1 |
The invention relates to a method of regenerating used oils of petroleum origin by means of extraction with aliphatic solvents. The inventive method is characterised in that, once the solvent has been eliminated from the extract, it comp...
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WO/2004/003110A1 |
A method for inhibiting and dissolving polymeric deposits on the internal surfaces of a caustic wash unit system in a hydrocarbon cracking process wherein said deposits result from polymerization of at least one component contained withi...
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WO/2003/093397A1 |
A method for inhibiting and dissolving the deposits formed on caustic or alkaline scrubbers used in scrubbing acidic gases such as carbon dioxide, hydrogen sulfide, which are formed during the pyrolytic cracking of naphtha, ethane, and p...
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WO/2003/093399A1 |
A method of reducing hydrolysis in a hydrocarbon stream comprising adding to a hydrocarbon stream containing a chloride compound which undergoes hydrolysis at elevated temperatures in the presence of water to form hydrochloric acid, an e...
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WO/2003/072224A1 |
A caustic recovery system comprising an oxygen source adapted to provide a gas stream comprising at least 30% oxygen. A method of regenerating caustic comprising intermingling spent caustic with a gas stream comprising at least 30% oxygen.
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WO/2003/050207A1 |
A process for fractionating and treating of a full range naphtha stream. The full boiling range naphtha stream is first split into a light boiling range naphta, an intermediate boiling range naphtha and a heavy boiling range naphtha. The...
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WO/2003/035807A1 |
A stable distillate fuel blend useful as a fuel or as a blending component of a fuel that is suitable for use in turbine engine, said fuel blend prepared from at least one highly paraffinic distillate fuel component having low to moderat...
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WO/2002/102935A1 |
The invention relates to a method for treating and upgrading a hydrocarbon containing acidic species such as mercaptans, comprising: (a) contacting the hydrocarbon, in the essential absence of oxygen, with a first phase of a treatment co...
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WO/2002/102940A1 |
The invention relates to a method for desulfurizing naphtha boiling-range hydrocarbons such as cracked naphtha. More particularly, the invention relates to hydrotreating the naphtha under selective hydrotreating conditions, and then remo...
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WO/2002/102934A1 |
The invention relates to a composition and method for treating liquid hydrocarbons in order to remove acidic impurities, such as mercaptans, particularly mercaptans having a molecular weight of about C¿4? (C¿4?H¿10?S=90 g/mole) and hi...
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WO/2002/102933A1 |
The invention relates to a method for treating naphtha, such as catalytically cracked naphtha, in order to remove acidic impurities, such a mercaptans. In particular, the invention relates to a method for mercaptans having a molecular we...
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WO/2002/102936A1 |
The invention relates to a method for treating and upgrading a hydrocarbon containing acidic species such as mercaptans, comprising: (a) contacting the hydrocarbon, in the essential absence of oxygen, with a first phase of a treatment co...
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WO/2002/062925A2 |
Economical processes are disclosed for production of components for refinery blending of transportation fuels which are liquid at ambient conditions by selective oxygenation of refinery feedstocks comprising a mixture of organic compound...
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WO/2002/036715A1 |
This invention is a method to inhibit the polymerization of carbonyl compounds in a basic wash unit operation in a hydrocarbon cracking process, wherein a compound selected from the group consisting of alpha-amino acids and esters thereo...
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WO/2002/034863A1 |
Methods for removing mercaptans from hydrocarbons streams, for example crude oil and natural gas, are provided. The methods use basic metal salts which react with mercaptans to form mercaptides. The metal salts are dissolved or suspended...
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WO/2002/018518A1 |
A process for desulfurizing fuels such as diesel oil and similar petroleum products to reduce the sulfur content to a range of from about 2 to 15 ppm sulfur is described. The sulfur containing fuel is contacted at slightly elevated tempe...
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WO/2002/018519A1 |
A process for deacidifying a crude oil and/or crude oil distallate containing organic acids, said process comprising: (a) contacting the crude oil and/or crude oil distillate with (i) a Group IA metal salt selected from the group contain...
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WO/2001/081501A2 |
The invention relates to methods for a demercaptanisation of dry and liquefied hydrocarbon gases, gasoline fractions, light oils and gas condensates and can be used for the gas, petroleum-refining, petroleum production and petrochemical ...
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WO/2001/079385A2 |
The present invention relates to a process for denitrogenating a distillate stream by contacting an organic nitrogen-containing petroleum distillate feed in the presence of an aqueous base selected from Group IA and IIA hydroxides and am...
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WO/2001/079396A1 |
The present invention is a process to reduce the fouling of equipment for processing petroleum feedstreams. The fouling is reduced by reducing the presence of peroxides and hydroperoxides in the feedstream. The steps of the process inclu...
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WO/2001/079384A1 |
The invention describes a method for preparing a low sulfur motor gasoline utilizing ethanol and caustic extraction.
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WO/2001/079380A2 |
This invention relates to reducing the amount of thiols (mercaptans) in petroleum streams, specifically, mercaptans above the five carbon molecular weight range.
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WO/2001/079386A2 |
The present invention relates to a process for reducing naphthenic acid content of crude oils and its fractions in the presence of an aqueous base selected from Group IA and IIA hydroxides and ammonium hydroxide and mixtures thereof, a p...
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WO/2001/079391A1 |
A gasoline blendstock is produced having a decreased amount of sulfur by first selectively hydrodesulfurizing a cracked naphtha that contains both non-mercaptan and mercaptan sulfur to produce a first product having a decreased amount of...
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WO/2001/060490A1 |
Vertical extending liquid/liquid contacting column, which column will, when in use, contain a dispersed and a continuous liquid phase, the column having a top liquid feed inlet, a top liquid outlet, a bottom liquid feed inlet, a bottom l...
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WO/2001/040113A1 |
Process for treating and regenerating spent aqueous solutions of caustic soda from purification and cleansing of petroliferous products, comprising the following steps in combination: optional deoiling said spent solution of caustic soda...
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WO/2001/036564A1 |
A process and apparatus to extract and recover heavy metals and sulfur from crude oil (3) or petroleum fuel products consisting of the steps of emulsifying (4) the crude oil with an emulsifying agent (5), adding a leach solution (14, 17)...
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WO/2000/068341A1 |
The invention is a process for decreasing the acidity of an organic acid containing petroleum oil, comprising contacting said petroleum oil containing organic acids with an effective amount of an alcohol and an effective trace amount of ...
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WO/2000/053706A1 |
A process for removing contaminants from used motor oil (10), used motor oil from a source (12) is passed through a used oil feed pump (14) to a heater (16). An amount of base is added to the used oil of between 0.5 and 5 weight percent....
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WO/2000/050539A1 |
The present invention describes a process for decreasing the acidity of a starting calcium containing, non-acid treated acidic crude oil by adding such an acidic crude oil to an effective amount of an aqueous base solution at conditions ...
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WO/2000/049114A1 |
A method for removing acidic compounds, color, and polynuclear aromatic hydrocarbons. The base catalyzed flow apparatus allows used oil to pass through the used oil feed pump (24) to heater (16). At the same time, a 50 % aqueous sodium o...
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WO/2000/037588A1 |
The present invention relates to a process for demetallating a petroleum stream by contacting a metals-containing petroleum feed in the presence of an aqueous base selected from Group IA and IIA hydroxides and carbonates and ammonium hyd...
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WO/2000/027957A1 |
The invention relates to a method for reprocessing waste oils and producing high-grade base oils, whereby waste oil is treated by means of distillation, thin-film evaporation in a high vacuum, optional fractionation for separation into l...
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WO/2000/020113A1 |
The present invention is a process for decreasing the acidity of a starting acidic crude oil by contacting an acidic crude with an effective excess of ammonia dissolved in said crude to form an ammonia-continuous oil discontinuous phase ...
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WO/2000/009631A1 |
The instant invention is directed to a process for reducing organic acids in petroleum feeds containing organic acids comprising: (a) thermally treating a petroleum feed containing organic acids in a thermal reaction zone comprising a pl...
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WO/1999/050375A1 |
The instant invention is directed to a process for extracting organic acids from a starting crude oil comprising the steps of: (a) treating the starting crude oil containing naphthenic acids with an amount of an alkoxylated amine and wat...
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WO/1999/050376A1 |
The instant invention is directed to a process for extracting organic acids including naphthenic acids, heavy metals, and sulfur from a starting crude oil comprising the steps of: (a) treating the starting crude oil containing organic ac...
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WO/1999/049000A1 |
A method is described for making a high purity coke fuel or anode grade coke from a heavy petroleum residuum by contacting a molten anhydrous alkali metal hydroxide with the heavy petroleum residuum at a temperature and for a time suffic...
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WO/1999/043766A1 |
A method for upgrading an oil stream containing naphthenic acid and sulfur contaminants which comprises, adding an alkaline earth oxide to the oil stream to form a mixture wherein said alkaline earth oxide is added at an effective amount...
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WO/1999/043406A1 |
A process for pre-treating a spent caustic stream prior to oxidation which includes countercurrent multi-stage elevated temperature solvent extraction of dissolved organic material from the spent caustic using a solvent to yield a spent ...
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WO/1999/034895A1 |
An electrochemical process for the production of a hydroxide solution and a sulfate by the electrolysis of a waste aqueous mixture of oxidizable sulfur impurities in the anode compartment of at least one electrolytic cell while producing...
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WO/1999/019539A2 |
Corrosion in aqueous alkanolamine, physical solvents, or combination of alkanolamine and physical solvent solutions used to remove acid gases from natural gas, synthetic gas, or light hydrocarbon streams can be reduced by addition of mix...
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WO/1999/013957A1 |
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...
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WO/1999/010444A1 |
The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a compound having formula (I) where R is S or O, an...
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WO/1998/041727A1 |
A method is provided for reducing an amount of a waste component present in a hydrocarbon fluid produced from an earth formation via a wellbore formed in the earth formation, the hydrocarbon fluid flowing in a stream of fluid through the...
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WO/1998/037937A1 |
A process for pretreating a spent caustic stream (18) prior to oxidation includes countercurrent multi-stage elevated temperature solvent extraction of dissolved organic material from the spent caustic in a multi-stage countercurrent liq...
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WO/1998/028381A1 |
The present invention is directed to an aqueous amine resin corrosion inhibitor composition and methods of using the same for inhibiting corrosion in equipment in contact with alkanolamine, hot carbonate solutions, diglyme and/or other s...
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WO/1998/000478A1 |
A hydrocarbon stream containing sulfur and sulfur compounds (18) is contacted with a water suspension of dolomitic lime and dibasic acid catalyst (13) in a reaction vessel (10) in order to transfer the sulfur and sulfur compounds from th...
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WO/1997/046638A1 |
An improved process for the desulfurization of petroleum feeds utilizing sodium metal comprising contacting said petroleum feeds with staged addition of sodium metal at a temperature of at least about 250 �C in the presence of excess o...
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WO/1997/023583A1 |
Acidic halides, especially chlorides, are removed from dry gas and liquid hydrocarbon streams by contact with an adsorbent of porous, inert particles impregnated with alkaline material. Preferably at least some of the internal pore struc...
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