Class 208/223 - Inorganic acid

Subclass of Class 208 - Mineral oils: processes and products
Definition: Processes wherein an inorganic acid is employed.
No. of patents: 24
Last issue date: 05/06/2008

Number	Title	Issue Date
7368617	Selective hydrogenation of acetylenes and dienes in a hydrocarbon stream Acetylenes and dienes in a stream containing hydrogen, methane, C2-C6 olefins and paraffins, C2-C6 acetylenes and dienes, benzene, toluene, xylenes, and other C6+ components are hydrogenated in a downflow boilin...	05/06/2008
7252756	Preparation of components for refinery blending of transportation fuels A process is disclosed for the production of refinery transportation fuel or components for refinery blending of transportation fuels having a reduced amount of sulfur and/or nitrogen-containing impurities. The process involves contacting a hydrocarbon feedstock con...	08/07/2007
7192565	Method of collecting mercaptans contained in a gaseous feed The gaseous feed flowing in through line 1 is contacted in contacting zone ZA with a liquid solvent flowing in through line 2. The solvent comprises between 0.001% and 100% by weight of a liquid olefin. Contacting in zone ZA is carried out in the prese...	03/20/2007
7019188	Use of ionic liquids to separate olefins, diolefins and aromatics The present invention relates to the separation of olefins, diolefins and lower aromatics from mixed streams of hydrocarbons using ionic liquids in the absence of metal compounds. The present invention eliminates the metal complexes conventionally used in such separ...	03/28/2006
6849774	Separation of dienes from olefins using ionic liquids Methods for separating di-olefins from mono-olefins, and olefins from non-olefins such as paraffins, oxygenates and aromatics; are provided. The methods use metal salts which complex both mono-olefins and di-olefins, but which selectively complex di-olefins in the p...	02/01/2005
6638419	Method for obtaining oil products with low sulphur content by desulfurization of extracts A method for obtaining oil products such as diesel fuel with improved quality, from a gas oil fraction containing organosulphur compounds such as dibenzenethiophenes and/or their derivatives, with initial and final boiling points generally ranging between...	10/28/2003
6596914	Method of desulfurization and dearomatization of petroleum liquids by oxidation and solvent extraction A multi-step process for desulfurizing liquid petroleum fuels that also removes nitrogen-containing compounds and aromatics. The process steps are: thiophene extraction; thiophene oxidation; thiophene-oxide and -dioxide extraction; raffinate solvent recov...	07/22/2003
6406616	Process for removing low amounts of organic sulfur from hydrocarbon fuels A process for desulfurizing hydrocarbons such as gasoline and similar petroleum products to reduce the sulfur content to a range of from about 2 to 15 ppm sulfur without affecting the octane rating is described. The sulfur containing hydrocarbon is contac...	06/18/2002
6402940	Process for removing low amounts of organic sulfur from hydrocarbon fuels 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 temperatures with an ox...	06/11/2002
6339182	Separation of olefins from paraffins using ionic liquid solutions Methods for separating olefins from non-olefins, such as parafins, including cycloparaffins, oxygenates and aromatics, are provided. The methods use metal salts to complex olefins, allowing the non-olefins to be separated by a variety of methods, includin...	01/15/2002
6303843	Method for removing sulfolane present in hydrocarbon A process for removing sulfone from a liquid hydrocarbon containing a concentration of sulfone by mixing a liquid acid therewith and thereafter separating the resulting admixture into an acid phase and a hydrocarbon phase. The hydrocarbon phase has a conc...	10/16/2001
5346614	Removal of hydrogen sulfide from an oil-containing mixture having a continuous aqueous phase A method and system for removing hydrogen sulfide from a continuous aqueous phase-containing fluid without forming a sulfur sludge. Oil is either initially present in the fluid or added thereto....	09/13/1994
5288681	Catalyst for the hydroconversion of asphaltene-containing hydrocarbonaceous charge stocks A catalyst prepared by the steps which comprise: (a) adding to an asphaltene-containing hydrocarbonaceous oil charge stock a metal compound, a heteropoly acid and water; (b) converting the metal compound and heteropoly acid within the charge stock by heat...	02/22/1994
5225159	Deodorization of sewage sludge-derived oils A method is provided for treating a sewage sludge-derived oil having a particular chemical composition, to reduce its odor. The method includes the first step of distilling the sewage sludge-derived oil to 150° C. to remove water and volatile organic com...	07/06/1993
5087350	Process for recovering metals and for removing sulfur from materials containing them by means of an oxidative extraction A process for removing S and Fe and to reclaim V, Ni and Co from coal or oil and their derivatives or from minerals. The process is based upon an oxidative extraction performed with hypochlorous acid (HClO) whose oxidizing power is generated and regulated...	02/11/1992
5034118	Non-oxidative removal of hydrogen sulfide from gaseous, petrochemical, and other streams Hydrogen sulfide can be conveniently removed from streams containing up to about 1,000 ppm of H2 S by reacting the latter with an olefin using a bed of an acidic solid catalyst in a non-oxidative process for the removal of hydrogen sulfide. The...	07/23/1991
5017280	Process for recovering metals and for removing sulfur from materials containing them by means of an oxidative extraction A process for removing S and Fe and to reclaim V, Ni and Co from coal or oil and their derivatives or from minerals. The process is based upon an oxidative extraction performed with hypochlorous acid (HC10) whose oxidizing power is generated and regulated...	05/21/1991
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
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
4606812	Hydrotreating of carbonaceous materials A process for hydrotreating carbonaceous materials is disclosed. The carbonaceous material is contacted with steam and with empirical hydrates of alkali metal hydrosulfides, monosulfides, or polysulfides. The process hydrocracks, hydrogenates, denitrogena...	08/19/1986
4518489	Oil Treatment Basic nitrogen-containing compounds are removed from mineral oil, such as shale oil, by extraction with an immiscible aqueous phase containing an acid gas such as carbon dioxide. Effectiveness of the separation is proportional to the partial pressure of t...	05/21/1985
3957628	Removal of organic sulfur compounds from hydrocarbon feedstocks A process in which organic sulfur, nitrogen and oxygen compounds are essentially quantitatively removed from hydrocarbon feedstocks by contacting said feedstocks with liquid hydrogen fluoride in the presence of hydrogen. Preferred feedstocks are those boi...	05/18/1976
3931352	HF acid treating the paraffin feed stream to an integrated paraffin isomerization-alkylation process The normal paraffin feed stream to an integrated paraffin isomerization-HF acid-catalyzed alkylation process is treated for the removal of catalyst deactivating sulfur and nitrogen compounds and water by contacting the feed stream with liquid hydrofluoric...	01/06/1976

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Class 208/223 - Inorganic acid