Patents by Inventor Shahid N. Shaikh
Shahid N. Shaikh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10005673Abstract: In one embodiment, a process for the purification of CO2 from chlorinated and non-chlorinated hydrocarbons, comprising: contacting a CO2 stream with a metal oxide catalyst, wherein the stream comprises the CO2 and impurities comprising the non-chlorinated hydrocarbons and the chlorinated hydrocarbons; interacting the impurities with the catalyst to form additional CO2 and metal chloride; and regenerating the catalyst by contacting the metal chloride with an oxygen containing gas stream.Type: GrantFiled: October 15, 2014Date of Patent: June 26, 2018Assignee: SAUDI BASIC INDUSTRIES CORPORATIONInventors: Aghaddin Kh. Mammadov, Shahid N. Shaikh, Clark David Rea, Xiankuan Zhang
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Publication number: 20160251226Abstract: In one embodiment, a process for the purification of CO2 from chlorinated and non-chlorinated hydrocarbons, comprising: contacting a CO2 stream with a metal oxide catalyst, wherein the stream comprises the CO2 and impurities comprising the non-chlorinated hydrocarbons and the chlorinated hydrocarbons; interacting the impurities with the catalyst to form additional CO2 and metal chloride; and regenerating the catalyst by contacting the metal chloride with an oxygen containing gas stream.Type: ApplicationFiled: October 15, 2014Publication date: September 1, 2016Applicant: Saudi Basic Industries CorporationInventors: Aghaddin Kh. Mammadov, Shahid N. Shaikh, Clark David Rea, Xiankuan Zhang
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Patent number: 8962702Abstract: The invention relates to a catalyst and process for making syngas mixtures including hydrogen, carbon monoxide and carbon dioxide. The process comprises contacting a gaseous feed mixture containing carbon dioxide and hydrogen with the catalyst, where the catalyst comprises Mn oxide and an auxiliary metal oxide selected from the group consisting of La, Ca, K, W, Cu, Al and mixtures or combinations thereof. The process enables hydrogenation of carbon dioxide into carbon monoxide with high selectivity, and good catalyst stability over time and under variations in processing conditions. The process can be applied separately, but can also be integrated with other processes, both up-stream and/or down-stream including methane reforming or other synthesis processes for making products like alkanes, aldehydes, or alcohols.Type: GrantFiled: December 8, 2011Date of Patent: February 24, 2015Assignee: Saudi Basic Industries CorporationInventors: Aghaddin Mamedov, Shahid N. Shaikh, Clark Rea, Xiankuan Zhang
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Patent number: 8551434Abstract: A method for making a syngas mixture is accomplished by introducing a gaseous feed mixture containing carbon dioxide and hydrogen into a reactor containing a non-zinc catalyst. The catalyst contacts the gaseous feed mixture to form syngas mixture reaction products. The reaction takes place in the presence of nickel-containing and/or iron-containing materials. The gaseous feed mixture is introduced into the reactor at a reactor inlet temperature of from 700° C. to 800° C., with the reaction being carried out at substantially adiabatic conditions or wherein the syngas mixture reaction products are removed from the reactor at a reactor outlet temperature of from 500° C. to 600° C.Type: GrantFiled: June 29, 2012Date of Patent: October 8, 2013Assignee: Saudi Basic Industries CorporationInventors: Aghaddin Mammadov, Mike Huckman, Clark Rea, Xiankuan Zhang, Shahid N. Shaikh
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Publication number: 20130150466Abstract: The invention relates to a catalyst and process for making syngas mixtures including hydrogen, carbon monoxide and carbon dioxide. The process comprises contacting a gaseous feed mixture containing carbon dioxide and hydrogen with the catalyst, where the catalyst comprises Mn oxide and an auxiliary metal oxide selected from the group consisting of La, Ca, K, W, Cu, Al and mixtures or combinations thereof. The process enables hydrogenation of carbon dioxide into carbon monoxide with high selectivity, and good catalyst stability over time and under variations in processing conditions. The process can be applied separately, but can also be integrated with other processes, both up-stream and/or down-stream including methane reforming or other synthesis processes for making products like alkanes, aldehydes, or alcohols.Type: ApplicationFiled: December 8, 2011Publication date: June 13, 2013Inventors: Aghaddin Mamedov, Shahid N. Shaikh, Clark Rea, Xiankuan Zhang
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Patent number: 7449426Abstract: Disclosed is a catalyst composition which does not contain antimony or molybdenum for the vapor phase ammoxidation of alkanes of the general empirical formula: VWaBibMcOx wherein M is one or more elements selected from sodium, cesium, magnesium, calcium, barium, boron, yttrium, indium, aluminum, gallium, tin, titanium, silicon, zirconium, germanium, niobium and tantalum, a is 0.2 to 10, b is 0.5 to 5, c is 0 to 10 and x is determined by the valence requirements of the elements present. The catalyst precursor is precipitated from a solution or slurry of compounds of vanadium, tungsten, bismuth and, optionally, M, then separated, dried and calcined to give a phase or combination of phases active in the ammoxidation of low-weight paraffins to the corresponding unsaturated mononitriles. Nitriles may be produced in a gas phase catalytic reaction of alkanes with ammonia and oxygen in the presence of the catalyst.Type: GrantFiled: November 29, 2005Date of Patent: November 11, 2008Assignee: Saudi Basic Industries CorporationInventors: Edouard A. Mamedov, Shahid N. Shaikh, Armando Araujo
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Patent number: 7186670Abstract: A process for the vapor phase ammoxidation of alkanes and olefins with a catalyst of the general empirical formula: VSbaMbQcOx wherein M is at least one element selected from magnesium, aluminum, zirconium, silicon, hafnium, titanium and niobium, Q is at least one element selected from rhenium, tungsten, molybdenum, tantalum, manganese, phosphorus, cerium, tin, boron, scandium, bismuth, gallium, indium, iron, chromium, lanthanum, yttrium, zinc, cobalt, nickel, cadmium, copper, strontium, barium, calcium, silver, potassium, sodium and cesium, a is 0.5 to 20, b is 2 to 50, c is 0 to 10 and x is determined by the valence requirements of the elements present. The process has a co-feed of gaseous carbon dioxide with an alkane (paraffin) and/or alkene, ammonia and an oxygen-containing gas which react in the presence of the catalyst to form a nitrile and by-products.Type: GrantFiled: September 30, 2004Date of Patent: March 6, 2007Assignee: Saudi Basic Industries CorporationInventors: Edouard A. Mamedov, Kathleen A. Bethke, Shahid N. Shaikh, Armando Araujo, Neeta K. Kulkarni
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Patent number: 6710011Abstract: A catalyst composition for the vapor phase ammoxidation of alkanes and olefins of the general empirical formulae: VSbaMbOx VSbaMbM′b′Ox VSbaMbQcOx VSbaMbQcQ′c′Ox wherein M and M′ are at least one element selected from magnesium, aluminum, zirconium, silicon, hafnium, titanium and niobium, M and M′ being different, Q and Q′ are at least one element selected from rhenium, tungsten, molybdenum, tantalum, manganese, phosphorus, cerium, tin, boron, scandium, bismuth, gallium, indium, iron, chromium, lanthanum, yttrium, zinc, cobalt, nickel, cadmium, copper, strontium, barium, calcium, silver, potassium, sodium and cesium, Q and Q′ being different, a is 0.5 to 20, b is 2 to 50, b′ is 0 to 50, c is 0 to 10, c′ is 0 to 10 and x is determined by the valence requirements of the elements present.Type: GrantFiled: December 21, 2001Date of Patent: March 23, 2004Assignee: Saudi Basic Industries CorporatioinInventors: Edouard A. Mamedov, Kathleen A. Bethke, Shahid N. Shaikh, Armando Araujo, Neeta K. Kulkarni, Andrei Khodakov
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Publication number: 20030144539Abstract: A catalyst composition for the vapor phase ammoxidation of alkanes and olefins of the general empirical formulae:Type: ApplicationFiled: December 21, 2001Publication date: July 31, 2003Applicant: Saudi Basic Industries Corporation (SABIC)Inventors: Edouard A. Mamedov, Kathleen A. Bethke, Shahid N. Shaikh, Armando Araujo, Neeta K. Kulkarni, Andrei Khodakov
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Patent number: 6235678Abstract: A catalyst composition for oxidative dehydrogenation of paraffinic hydrocarbons and other compounds having at least two adjacent carbon atoms each having at least one hydrogen atom. The catalyst composition is represented by the formula AaBbSbcVdAleOx wherein A is an alkali or alkaline earth metal; B is one or more optional elements selected from zinc, cadmium, lead, nickel, cobalt, iron, chromium, bismuth, gallium, niobium, tin and neodymium; a is 0 to 0.3, b is 0 to 5, c is 0.5 to 10, d is 1, e is 3 to 10, 7≦a+b+c+d+e≦25, and x is determined by the valence requirements of the elements present. A process for the oxidative dehydrogenation of paraffins using the catalyst composition.Type: GrantFiled: June 11, 1999Date of Patent: May 22, 2001Assignee: Saudi Basic Industries CorporationInventors: Edouard A. Mamedov, Shahid N. Shaikh
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Patent number: 5817881Abstract: Alkanes are catalytically oxidized in air or oxygen using iron-substituted polyoxoanions (POAs) of the formula:H.sub.e-z ?(n-C.sub.4 H.sub.9).sub.4 N!.sub.z (XM.sub.11 M'O.sub.39).sup.-eThe M' (e.g., iron(III)/iron(II)) reduction potential of the POAs is affected by selection of the central atom X and the framework metal M, and by the number of tetrabutyl-ammonium groups. Decreased Fe(III)/Fe(II) reduction potential has been found to correlate to increased oxidation activity.Type: GrantFiled: July 30, 1997Date of Patent: October 6, 1998Assignee: Sun Company, Inc. (R&M)Inventors: Paul E. Ellis, James E. Lyons, Harry K. Myers, Jr., Shahid N. Shaikh
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Patent number: 5705685Abstract: Alkanes are converted to unsaturated carboxylic acids by contacting an alkane with an oxidizing agent and a heteropolyacid or polyoxoanion comprising (1) at least 9 atoms of a first framework metal or metals comprising molybdenum, tungsten or vanadium or combinations thereof and (2) 1 to 3 atoms of a second framework metal or metals comprising zinc or a transition metal different from the first framework metal.Type: GrantFiled: October 31, 1995Date of Patent: January 6, 1998Assignee: Sun Company, Inc. (R&M)Inventors: James E. Lyons, Paul E. Ellis, Jr., Swati Karmakar, Shahid N. Shaikh
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Patent number: 5334780Abstract: Alkanes are catalytically oxidized using heteropolyacids (HPAs) or polyoxoanions (POAs) deposited on a graphite surface. The HPAs and POAs are framework-substituted with a different metal in place of a metal-oxygen unit.Type: GrantFiled: July 30, 1993Date of Patent: August 2, 1994Assignee: Sun Company, Inc.Inventors: Shahid N. Shaikh, Paul E. Ellis, Jr., James E. Lyons