Patents by Inventor Sargis Khoobiar
Sargis Khoobiar 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: 4766266Abstract: Isobutane is dehydrogenated to isobutylene with minimal, preferably no more than 15%, loss of the fresh feed isobutane by structural isomerization or cracking, even when the dehydrogenation feed contains substantial amounts of isobutylene. The catalysts employed comprise platinum and promoting amounts of at least one of indium, neodymium, and tin on a nonacidic support, such as zinc aluminate. The reaction is carried out at a pressure of 0.14 to 2 bar, and an outlet temperature, .sup.o K, minimum residence time, sec., defined by the equationR=1.76.times.10.sup.-4 e.sup.7890/T.Type: GrantFiled: November 13, 1985Date of Patent: August 23, 1988Assignee: Arco Chemical CompanyInventor: Sargis Khoobiar
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Patent number: 4754049Abstract: Unsaturated nitriles, particularly acrylonitrile or methacrylonitrile, are produced in a process which integrates dehydrogenation of an alkane, particularly propane or isobutane, to the corresponding olefin, followed by ammoxidation of the olefin in the dehydrogenation reactor effluent to the corresponding nitrile. After recovery of the nitrile product, the residual gases are processed to remove hydrogen, oxygen, and carbon oxides, after which the gases are recycled to the dehydrogenation reactor. By operating with relatively low conversion of olefin to nitrile in each pass, the overall efficiency of the process is improved despite the need to recirculate substantial amounts of unreacted hydrocarbons.Type: GrantFiled: February 18, 1986Date of Patent: June 28, 1988Assignee: Atlantic Richfield CompanyInventors: Sargis Khoobiar, Arnold J. Shapiro
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Patent number: 4609502Abstract: Unsaturated nitriles, particularly acrylonitrile, are produced in a process which integrates dehydrogenation of an alkane, particularly propane, to the corresponding olefin, followed by ammoxidation of the olefin in the dehydrogenation reactor effluent to the corresponding nitrile. After recovery of the nitrile product, the residual gases are processed to remove hydrogen, oxygen, and carbon oxides, after which the gases are recycled to the dehydrogenation reactor. By operating with relatively low conversion of olefin to nitrile in each pass, the overall efficiency of the process is improved despite the need to recirculate substantial amounts of unreacted hydrocarbons.Type: GrantFiled: February 14, 1985Date of Patent: September 2, 1986Assignee: The Halcon SD Group, Inc.Inventors: Sargis Khoobiar, Arnold J. Shapiro
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Patent number: 4547588Abstract: A catalyst composition useful for the oxidation of unsaturated aldehydes, particularly the oxidation of methacrolein to produce methacrylic acid, comprises the combination of oxides of molybdenum, copper, phosphorus, antimony, and cesium and/or calcium and optionally may include one or more of the elements Ni, Zn, Ru, Rh, Pd, Pt, As, K, Rb, Sr, Ba, Cr, V, Nb, W, Mn, Re, and rare earth metals including La.Type: GrantFiled: March 30, 1981Date of Patent: October 15, 1985Assignee: The Halcon SD Group, Inc.Inventor: Sargis Khoobiar
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Patent number: 4535188Abstract: Isobutane in a C.sub.4 hydrocarbon feed stream is converted to methacrolein in an integrated two-step process. Isobutane is dehydrogenated in a first step to isobutylene, hydrogen, and by-products and the reaction effluent is passed directly into a second step where isobutylene is oxidized to methacrolein without significant oxidation of the hydrogen and by-products. Any normal butenes present are converted to butadiene. The methacrolein and by-products may be separated and the unreacted isobutylene and isobutane recycled to the first step. Alternatively, the effluent from the second step may be used as feed to a further oxidation step for conversion of methacrolein to methacrylic acid.Type: GrantFiled: September 20, 1982Date of Patent: August 13, 1985Assignee: The Halcon SD Group, Inc.Inventor: Sargis Khoobiar
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Patent number: 4532365Abstract: Alkanes, particularly propane and isobutane are converted to unsaturated aldehydes, particularly acrolein and methacrolein in an integrated two-step process wherein the alkane is dehydrogenated in a first step to the corresponding olefin, hydrogen, and by-products and the reaction effluent is passed directly into a second step where the olefin is oxidized to the corresponding unsaturated aldehyde without significant oxidation of the hydrogen and by-products. The aldehydes and by-products may be separated and the unreacted olefin and alkane recycled to the first step. Alternatively, the effluent from the second step may be used as feed to a further oxidation step for conversion of the unsaturated aldehyde to the corresponding unsaturated acid.Type: GrantFiled: February 22, 1983Date of Patent: July 30, 1985Assignee: The Halcon SD Group, Inc.Inventor: Sargis Khoobiar
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Patent number: 4503247Abstract: A catalyst composition useful for the oxidation of unsaturated aldehydes, particularly the oxidation of methacrolein to produce methacrylic acid, comprises the combination of oxides of molybdenum, copper, phosphorus, antimony, cesium and rhenium in predetermined relative atomic ratios.Type: GrantFiled: July 6, 1982Date of Patent: March 5, 1985Assignee: The Halcon SD Group, Inc.Inventor: Sargis Khoobiar
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Patent number: 4479013Abstract: A catalyst composition useful for the oxidation of olefins, particularly the vapor phase oxidation of isobutylene and/or tertiary butyl alcohol to produce methacrolein, consists essentially of the combination of oxides of molybdenum, cobalt, iron, bismuth, thallium, antimony, silicon, and nickel, along with one or more members of the groups consisting of the alkali metals, the alkaline earth metals, the rare earth metals including lanthanum, tungsten, and mixtures thereof. The catalyst has a BET surface area within the range of about 0.5-10 m.sup.2 /gm and preferably within the range of about 2-6 m.sup.2 /gm. Preferably, the catalyst has no more than about 3% of the surface area associated with pores smaller than about 100 .ANG.. The catalyst is heated during its preparation to a temperature above 525.degree. C., preferably above 550.degree. C., most preferably to about 600.degree. C.Type: GrantFiled: July 9, 1982Date of Patent: October 23, 1984Assignee: The Halcon SD Group, Inc.Inventor: Sargis Khoobiar
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Patent number: 4479014Abstract: Isobutane in a C.sub.4 hydrocarbon feed stream is converted to methacrolein in an integrated two-step process. Isobutane is dehydrogenated in a first step to isobutylene, hydrogen, and by-products and the reaction effluent is passed directly into a second step where isobutylene is oxidized to methacrolein without significant oxidation of the hydrogen and by-products. Any normal butenes present are converted to butadiene. The methacrolein and by-products may be separated and the unreacted isobutylene and isobutane recycled to the first step. Alternatively, the effluent from the second step may be used as feed to a further oxidation step for conversion of methacrolein to methacrylic acid.Type: GrantFiled: September 20, 1982Date of Patent: October 23, 1984Assignee: The Halcon SD Group, Inc.Inventor: Sargis Khoobiar
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Patent number: 4454346Abstract: A catalyst composition useful for the oxidation of unsaturated aldehydes, particularly the oxidation of methacrolein to produce methacrylic acid, comprises the combination of oxides of molybdenum, copper, phosphorus, antimony, and cesium in predetermined relative atomic ratios.Type: GrantFiled: March 27, 1981Date of Patent: June 12, 1984Assignee: The Halcon SD Group, Inc.Inventor: Sargis Khoobiar
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Patent number: 4413147Abstract: Isobutane is converted to methacrolein in an integrated two-step process wherein isobutane is dehydrogenated in a first step to isobutylene, hydrogen, and by-products and the reaction effluent is passed directly into a second step where isobutylene is oxidized to methacrolein without significant oxidation of the hydrogen and by-products. The methacrolein and by-products may be separated and the unreacted isobutylene and isobutane recycled to the first step. Alternatively, the effluent from the second step may be used as feed to a further oxidation step for conversion of methacrolein to methacrylic acid. In one embodiment, the hydrogen produced in the first step is oxidized using the excess oxygen from the second step under conditions selected to avoid loss of the C.sub.4 components. In an alternative embodiment, the unreacted isobutane and isobutylene are absorbed and separated from the remaining components before being recycled to the first step.Type: GrantFiled: April 14, 1982Date of Patent: November 1, 1983Assignee: The Halcon SD Group, Inc.Inventor: Sargis Khoobiar
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Patent number: 4377501Abstract: A catalyst composition useful for the oxidation of unsaturated aldehydes, particularly the oxidation of methacrolein to produce methacrylic acid, comprises the combination of oxides of molybdenum, copper, phosphorus, antimony, cesium and rhenium in predetermined relative atomic ratios.Type: GrantFiled: June 12, 1979Date of Patent: March 22, 1983Assignee: The Halcon SD Group, Inc.Inventor: Sargis Khoobiar
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Patent number: 4374757Abstract: A catalyst composition useful for the oxidation of unsaturated aldehydes, particularly the oxidation of methacrolein to produce methacrylic acid, comprises the combination of oxides of molybdenum, copper, phosphorus, antimony, and cesium in predetermined relative atomic ratios.Type: GrantFiled: December 26, 1978Date of Patent: February 22, 1983Assignee: The Halcon SD Group, Inc.Inventor: Sargis Khoobiar
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Patent number: 4374759Abstract: A catalyst composition useful for the oxidation of olefins, particularly the vapor phase oxidation of isobutylene and/or tertiary butyl alcohol to produce methacrolein, consists essentially of the combination of oxides of molybdenum, cobalt, iron, bismuth, thallium, antimony, silicon, and nickel, along with one or more members of the groups consisting of the alkali metals, the alkaline earth metals, the rare earth metals including lanthanum, tungsten, and mixtures thereof. The catalyst has a BET surface area within the range of about 0.5-10 m.sup.2 /gm and preferably within the range of about 2-6 m.sup.2 /gm. Preferably, the catalyst has no more than about 3% of the surface area associated with pores smaller than about 100 A.degree.. The catalyst is heated during its preparation to a temperature above 525.degree. C., preferably above 550.degree. C., most preferably to about 600.degree. C.Type: GrantFiled: December 7, 1981Date of Patent: February 22, 1983Assignee: The Halcon SD Group, Inc.Inventor: Sargis Khoobiar
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Patent number: 4319042Abstract: A catalyst composition useful for the oxidation of unsaturated aldehydes, particularly the oxidation of methacrolein to produce methacrylic acid, comprises the combination of oxides of molybdenum, copper, phosphorus, antimony, and calcium in predetermined relative atomic ratios.Type: GrantFiled: October 14, 1980Date of Patent: March 9, 1982Assignee: Atlantic Richfield CompanyInventor: Sargis Khoobiar
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Patent number: 4314074Abstract: A catalyst composition useful for the oxidation of unsaturated aldehydes, particularly the oxidation of methacrolein to produce methacrylic acid, comprises the combination of oxides of molybdenum, copper, phosphorus, antimony, calcium, tungsten and optionally arsenic in predetermined relative atomic ratios.Type: GrantFiled: October 14, 1980Date of Patent: February 2, 1982Assignee: Atlantic Richfield CompanyInventor: Sargis Khoobiar
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Patent number: 4271040Abstract: A catalyst composition useful for the oxidation of unsaturated aldehydes, particularly the oxidation of methacrolein to produce methacrylic acid, comprises the combination of oxides of molybdenum, copper, phosphorus, antimony, and cesium and/or calcium and optionally may include one or more of the elements Ni, Zn, Ru, Rh, Pd, Pt, As, K, Rb, Sr, Ba, Cr, V, Nb, W, Mn, Re, and rare earth metals including La.Type: GrantFiled: October 3, 1979Date of Patent: June 2, 1981Assignee: Halcon Research and Development Corp.Inventor: Sargis Khoobiar
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Patent number: 4261859Abstract: A catalyst composition useful for the oxidation of unsaturated aldehydes, particularly the oxidation of methacrolein to produce methacrylic acid, comprises the combination of oxides of molybdenum, copper, phosphorus, antimony, calcium, tungsten and optionally arsenic in predetermined relative atomic ratios.Type: GrantFiled: April 6, 1979Date of Patent: April 14, 1981Assignee: Halcon Research & Development Corp.Inventor: Sargis Khoobiar
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Patent number: 4261860Abstract: A catalyst composition useful for the oxidation of unsaturated aldehydes, particularly the oxidation of methacrolein to produce methacrylic acid, comprises the combination of oxides of molybdenum, copper, phosphorus, antimony, and calcium in predetermined relative atomic ratios.Type: GrantFiled: April 6, 1979Date of Patent: April 14, 1981Assignee: Halcon Research & Development Corp.Inventor: Sargis Khoobiar
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Patent number: RE32082Abstract: Isobutane is converted to methacrolein in an integrated two-step process wherein isobutane is dehydrogenated in a first step to isobutylene, hydrogen, and by-products and the reaction effluent is passed directly into a second step where isobutylene is oxidized to methacrolein without significant oxidation of the hydrogen and by-products. The methacrolein and by-products may be separated and the unreacted isobutylene and isobutane recycled to the first step. Alternatively, the effluent from the second step may be used as feed to a further oxidation step for conversion of methacrolein to methacrylic acid. In one embodiment, the hydrogen produced in the first step is oxidized using the excess oxygen from the second step under conditions selected to avoid loss of the C.sub.4 components. In an alternative embodiment, the unreacted isobutane and isobutylene are absorbed and separated from the remaining components before being recycled to the first step.Type: GrantFiled: May 16, 1985Date of Patent: February 11, 1986Assignee: The Halcon SD Group, Inc.Inventor: Sargis Khoobiar