Patents by Inventor Christos Paparizos
Christos Paparizos 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: 6458742Abstract: A catalyst composition comprising a complex of catalytic oxides of iron, bismuth, molybdenum, cobalt, cerium, antimony, at least one of nickel or magnesium, and at least one of lithium, sodium, potassium, rubidium, or thallium, and characterized by the following empirical formula: AaBbCcFedBieCofCegSbhMomOx wherein A is at least one of Cr, P, Sn, Te, B, Ge, Zn, In, Mn, Ca, W, or mixtures thereof B is at least one of Li, Na, K, Rb, Cs, Tl, or mixtures thereof C is least one of Ni, Mg or mixtures thereof a is 0 to 4.0 b is 0.01 to 1.5 c is 1.0 to 10.0 d is 0.1 to 5.0 e is 0.1 to 2.0 f is 0.1 to 10.0 g is 0.1 to 2.0 h is 0.1 to 2.0 m is 12.0 to 18.0 and x is a number determined by the valence requirements of the other elements present. The catalyst is useful in processes for the ammoxidation of an olefin selected from the group consisting of propylene, isobutylene or mixtures thereof, to acrylonitrile, methacrylonitrile and mixtures thereof, respectively.Type: GrantFiled: August 17, 2000Date of Patent: October 1, 2002Assignee: The Standard Oil CompanyInventors: Christos Paparizos, Michael J. Seely, Maria S. Friedrich, Dev D. Suresh
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Patent number: 6399813Abstract: A process for the preparation of a fluid bed vinyl acetate (VAM) catalyst comprising impregnating a support comprising a mixture of substantially inert microspheroidal particles with a solution comprising a metal salt of Pd and M, wherein M comprises Ba, Cd, Au, La, Nb, Ce, Zn, Pb, Ca, Sr, Sb or mixtures thereof, reducing the metal salts to form a deposit of Pd and M on the support surface and impregnating the support with at least one alkali metal salt. At least 50% of the particles used for the microspheroidal support have a particle size below 105 microns.Type: GrantFiled: August 14, 2001Date of Patent: June 4, 2002Assignee: The Standard Oil CompanyInventors: Patricia Rae Blum, Larry Michael Cirjak, Marc Anthony Pepera, Christos Paparizos, George Frederick Salem, Michael James Baker
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Patent number: 6395676Abstract: A process for the preparation of a fluid bed vinyl acetate (VAM) catalyst comprising impregnating a support comprising a mixture of substantially inert microspheroidal particles with a solution comprising a metal salt of Pd and M, wherein M comprises Ba, Cd, Au, La, Nb, Ce, Zn, Pb, Ca, Sr, Sb or mixtures thereof, reducing the metal salts to form a deposit of Pd and M on the support surface and impregnating the support with at least one alkali metal salt. At least 50% of the particles used for the microspheroidal support have a particle size below 105 microns.Type: GrantFiled: June 30, 1999Date of Patent: May 28, 2002Assignee: The Standard Oil CompanyInventors: Patricia Rae Blum, Larry Michael Cirjak, Marc Anthony Pepera, Christos Paparizos, George Frederick Salem, Michael James Baker
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Publication number: 20020058833Abstract: A fluid bed process for the manufacture of vinyl acetate from ethylene, acetic acid and oxygen comprising feeding ethylene and acetic acid into a fluid bed reactor through a first inlet, introducing the oxygen into the reactor through a second inlet, co-joining the oxygen, ethylene and acetic acid in the reactor in contact with a fluid bed catalyst to produce vinyl acetate. The particle size diameter of the particulate catalyst material has a range of 60% of the particles being below 200 microns (0.1 mm) with no more than 40% of the particles being below 40 microns (0.04 mm).Type: ApplicationFiled: October 17, 2001Publication date: May 16, 2002Inventors: Larry M. Cirjak, Michael F. Lemanski, David R. Wagner, Nancy C. Benkalowycz, Patricia R. Blum, Marc A. Pepera, Christos Paparizos
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Publication number: 20020028966Abstract: A process for the preparation of a fluid bed vinyl acetate (VAM) catalyst comprising impregnating a support comprising a mixture of substantially inert microspheroidal particles with a solution comprising a metal salt of Pd and M, wherein M comprises Ba, Cd, Au, La, Nb, Ce, Zn, Pb, Ca, Sr, Sb or mixtures thereof, reducing the metal salts to form a deposit of Pd and M on the support surface and impregnating the support with at least one alkali metal salt. At least 50% of the particles used for the microspheroidal support have a particle size below 105 microns.Type: ApplicationFiled: August 14, 2001Publication date: March 7, 2002Inventors: Patricia Rae Blum, Larry Michael Cirjak, Marc Anthony Pepera, Christos Paparizos, George Frederick Salem, Michael James Baker
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Publication number: 20010018401Abstract: A process for the preparation of a fluid bed vinyl acetate (VAM) catalyst comprising impregnating a support comprising a mixture of substantially inert microspheroidal particles with a solution comprising a metal salt of Pd and M, wherein M comprises Ba, Cd, Au, La, Nb, Ce, Zn, Pb, Ca, Sr, Sb or mixtures thereof, reducing the metal salts to form a deposit of Pd and M on the support surface and impregnating the support with at least one alkali metal salt. At least 50% of the particles used for the microspheroidal support have a particle size below 105 microns.Type: ApplicationFiled: June 30, 1999Publication date: August 30, 2001Inventors: PATRICIA RAE BLUM, LARRY MICHAEL CIRJAK, MARC ANTHONY PEPERA, CHRISTOS PAPARIZOS, GEORGE FREDERICK SALEM, MICHAEL JAMES BAKER
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Patent number: 6268529Abstract: A process for the manufacture of acrylic acid comprising reacting propylene and oxygen (preferably in the form of air) in a reaction zone having a catalyst characterized by the following formula: AaBbCcCadFeeBifMo12Ox where A=one or more of Li, Na, K, Rb and Cs B=one or more of Mg, Sr, Mn, Ni, Co and Zn C=one or more of Ce, Cr, Al, Sb, P, Ge, Sn, Cu, V and W and a=0.01 to 1.0; b and e =1.0-10 c=0 to 5.0, preferably 0.05 to 5.0, especially preferred being 0.05 to 4.0 d and f=0.05 to 5.0, and x is a number determined by the valence requirements of the other elements present; at an elevated temperature to produce acrylic acid and acrolein.Type: GrantFiled: December 8, 1998Date of Patent: July 31, 2001Assignee: The Standard Oil CompanyInventors: Dev Dhanaraj Suresh, Christos Paparizos, Patrick Eugene Mosier, Ying Wu, Maria Strada Friedrich, Michael J. Seely
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Patent number: 5877108Abstract: A process for regenerating molybdenum containing ammoxidation catalyst comprising replacing the molybdenum loss from the catalyst during the ammoxidation reaction wherein ammonium dimolybdenum is utilized as the source for replacement of the molybdenum loss from the original catalyst.Type: GrantFiled: December 11, 1997Date of Patent: March 2, 1999Assignee: The Standard Oil CompanyInventors: Dev Dhanaraj Suresh, Christos Paparizos, Michael J. Seely, Tama Lee Drenski, Maria Strada Friedrich
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Patent number: 5840648Abstract: A catalyst composition comprising a complex of catalytic oxides of iron, bismuth, molybdenum and calcium and characterized by the following empirical formula:A.sub.a B.sub.b C.sub.c D.sub.d Fe.sub.e Bi.sub.f MO.sub.12 O.sub.xwhere A=one or more of Li, Na, K, Rb and Cs or mixtures thereofB=one or more of Mg, Mn, Ni, Co, Ag, Pb, Re, Cd and Zn or mixtures thereofC=one or more of Ce, Cr, Al, Sb, P, Ge, La, Sn, V and W or mixtures thereofD=one or more of Ca, Sr, Ba or mixtures thereofand a=0.01 to 1.0; b and e=1.0-10; c, d, and f=0.1 to 5.0 and x is a number determined by the valence requirements of the other elements present.Type: GrantFiled: September 2, 1997Date of Patent: November 24, 1998Assignee: The Standard Oil CompanyInventors: Dev Dhanaraj Suresh, Christos Paparizos, Michael J. Seely, Maria Strada Friedrich, Tama Lee Drenski
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Patent number: 5783726Abstract: A process of producing a fluid bed oxacylation catalyst for olefins and diolefins having the following formula Pd--M--A whereM=Au, Cd, Bi, Cu, Mn, Fe, Co, Ce, U and mixtures thereof,A=an alkali metal or mixture thereof, andM is present in the range of from 0 to 5 wt %, comprising milling a fixed bed oxacylation catalyst precursor comprising Pd--M on a fixed support with a fluid bed catalyst aqueous binder material to form a uniform aqueous slurry, drying the aqueous slurry to remove the water to form microspheroidal particles of solid fluid bed catalyst precursor, impregnating the microspheroidal particles with a solution of alkali metal salt to form the fluid bed catalyst. The catalyst is particularly useful in the manufacture of vinyl acetate from ethylene, acetic acid and oxygen.Type: GrantFiled: April 21, 1997Date of Patent: July 21, 1998Assignee: The Standard Oil CompanyInventors: Michael F. Lemanski, Christos Paparizos, Patricia R. Blum, Larry M. Cirjak, Marc A. Pepera
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Patent number: 5770757Abstract: A catalyst having the atomic ratios set forth in the empirical formula below:A.sub.a B.sub.b C.sub.c Ge.sub.d Bi.sub.e Mo.sub..sub.12 O.sub.xwhereA=two or more of alkali metals, In and TlB=one or more of Mg, Mn, Ni, Co, Ca, Fe, Ce, Sm, Cr, Sb, and W; preferably B equals the combination of Fe and at least one element selected from the group consisting of Ni and Co and at least one element selected from the group consisting of Mg, Mn, Ca, Ce, Sn, Cr, Sb, and WC=one or more of Pb, Eu, B, Sn, Te and Cua=0.05 to 5.0b=5 to 12c=0 to 5.0d=0.1 to 2.0e=0.1 to 2.0x=the number of oxygen atoms required to satisfy the valency requirements of the other elements andb>a+c.Type: GrantFiled: May 3, 1996Date of Patent: June 23, 1998Assignee: The Standard Oil CompanyInventors: Tama Lee Drenski, Maria Strada Friedrich, Christos Paparizos, Michael J. Seely, Dev Dhanaraj Suresh
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Patent number: 5710318Abstract: A fluid bed process for the manufacture of vinyl acetate from ethylene, acetic acid and oxygen comprising feeding a gaseous mixture comprising ethylene and acetic acid into a fluid bed reactor through a first inlet, introducing the oxygen into the reactor through a second inlet, co-joining the oxygen, ethylene and acetic acid in the reactor in contact with a fluid bed catalyst to produce vinyl acetate. The particle size diameter of the particulate catalyst material has a range of 60% of the particles being below 200 microns (0.1 mm) with no more than 40% of the particles being below 40 microns (0.04 mm).Type: GrantFiled: August 27, 1996Date of Patent: January 20, 1998Assignee: The Standard Oil CompanyInventors: Larry M. Cirjak, Michael F. Lemanski, David R. Wagner, Nancy C. Benkalowycz, Patricia R. Blum, Marc A. Pepera, Christos Paparizos
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Patent number: 5688739Abstract: A catalyst having the atomic ratios set forth in the empirical formula below:A.sub.a B.sub.b C.sub.c Ge.sub.d Bi.sub.e Mo.sub.12 O.sub.xwhereA=two or more of alkali metals, In and TlB=one or more of Mg, Mn, Ni, Co, Ca, Fe, Ce, Sm, Cr, Sb, and W; preferably B equals the combination of Fe and at least one element selected from the group consisting of Ni and Co and at least one element selected from the group consisting of Mg, Mn, Ca, Ce, Sn, Cr, Sb, and WC=one or more of Pb, Eu, B, Sn, Te and Cua=0.05 to 5.0b=5 to 12c=0 to 5.0d=0.1 to 2.0e=0.1 to 2.0x=the number of oxygen atoms required to satisfy the valency requirements of the other elements andb>a+c.Type: GrantFiled: May 3, 1996Date of Patent: November 18, 1997Assignee: The Standard Oil CompanyInventors: Tama Lee Drenski, Maria Strada Friedrich, Christos Paparizos, Michael J. Seely, Dev Dhanaraj Suresh
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Patent number: 5665667Abstract: A process of producing a fluid bed oxacylation catalyst for olefins and diolefins having the following formula Pd-M-A whereM=Au, Cd, Bi, Cu, Mn, Fe, Co, Ce, U and mixtures thereof,A=an alkali metal or mixture thereof, andM is present in the range of from 0 to 5 wt %,comprising milling a fixed bed oxacylation catalyst precursor comprising Pd-M on a fixed support with a fluid bed catalyst aqueous binder material to form a uniform aqueous slurry, drying the aqueous slurry to remove the water to form microspheroidal particles of solid fluid bed catalyst precursor, impregnating the microspheroidal particles with a solution of alkali metal salt to form the fluid bed catalyst. The catalyst is particularly useful in the manufacture of vinyl acetate from ethylene, acetic acid and oxygen.Type: GrantFiled: January 20, 1995Date of Patent: September 9, 1997Assignee: The Standard Oil CompanyInventors: Michael F. Lemanski, Christos Paparizos, Patricia R. Blum, Larry M. Cirjak, Marc A. Pepera
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Patent number: 5591688Abstract: A process for the preparation of a fluid bed vinyl acetate (VAM) catalyst comprising impregnating a support comprising a mixture of substantially inert microspheroidal particles with a solution comprising a halide-free metal salt of Pd and M, wherein M comprises Ba, Au, La, Nb, Ce, Zn, Pb, Ca, Sr, Sb or mixtures thereof, reducing the metal salts to form a deposit of Pd and M on the support surface and impregnating the support with at least one halide-free alkali metal salt. At least 50% of the particles used for the microspheroidal support have a particle size below 100 microns, preferably below 60 microns.Type: GrantFiled: January 20, 1995Date of Patent: January 7, 1997Assignee: The Standard Oil CompanyInventors: Patricia R. Blum, Larry M. Cirjak, Marc A. Pepera, Christos Paparizos
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Patent number: 5550281Abstract: A fluid bed process for the manufacture of vinyl acetate from ethylene, acetic acid and oxygen comprising feeding a gaseous mixture comprising ethylene and acetic acid into a fluid bed reactor through a first inlet, introducing the oxygen into the reactor through a second inlet, co-joining the oxygen, ethylene and acetic acid in the reactor in contact with a fluid bed catalyst to produce vinyl acetate. The particle size diameter of the particulate catalyst material has a range of 60% of the particles being below 200 microns (0.1 mm) with no more than 40% of the particles being below 40 microns (0.04 mm).Type: GrantFiled: June 2, 1994Date of Patent: August 27, 1996Inventors: Larry M. Cirjak, Michael F. Lemanski, David R. Wagner, Nancy C. Benkalowycz, Patricia R. Blum, Marc A. Pepera, Christos Paparizos
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Patent number: 5536693Abstract: A process of producing a fluid bed oxacylation catalyst for olefins and diolefins having the following formula Pd-M-A whereM=Au, Cd, Bi, Cu, Mn, Fe, Co, Ce, U and mixtures thereof,A=an alkali metal or mixture thereof, andM is present in the range of from 0 to 5 wt %, comprising milling a fixed bed oxacylation catalyst precursor comprising Pd-M on a fixed support with a fluid bed catalyst aqueous binder material to form a uniform aqueous slurry, drying the aqueous slurry to remove the water to form microspheroidal particles of solid fluid bed catalyst precursor, impregnating the microspheroidal particles with a solution of alkali metal salt to form the fluid bed catalyst. The catalyst is particularly useful in the manufacture of vinyl acetate from ethylene, acetic acid and oxygen.Type: GrantFiled: June 2, 1994Date of Patent: July 16, 1996Assignee: The Standard Oil CompanyInventors: Michael F. Lemanski, Christos Paparizos, Patricia R. Blum, Larry M. Cirjak, Marc A. Pepera
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Patent number: 5466652Abstract: A process for the manufacture of a Pd/Au/alkali metal catalyst, preferably a fluid bed catalyst used in the production of vinyl acetate comprising impregnating a microspheroidal support with a hydroxy-free metal salt solution of Pd and Au substantially free of barium and halide, reducing said salts to deposit Pd and Au on said support surface and impregnating said support with a halide-free metal salt of an alkali metal (preferably potassium).Type: GrantFiled: February 22, 1994Date of Patent: November 14, 1995Assignee: The Standard Oil Co.Inventors: Christos Paparizos, Dev D. Suresh, Michael F. Lemanski
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Patent number: 5258543Abstract: Disclosed is a method for ammoxidizing C.sub.3 to C.sub.5 mono-olefins to .alpha.,.beta.-mono-unsaturated acyclic nitriles having 3 to 5 carbon atoms and HCN by introducing such mono-olefins molecular oxygen and ammonia into a reaction zone into vapor phase contact with a solid ammoxidation catalyst, wherein the mol ratio of introduced molecular oxygen and ammonia to said introduced mono-olefin is at least 1.5 and 1.0, respectively, wherein said catalyst contains the elements and proportions indicated by the empirical formula:V1Sb.sub.a M.sub.m N.sub.n O.sub.xwherea=0.5 to 2M=one or more of: Sn, Ti, Fe, and Gam=0.05 to 3, usually at least 0.1 and at most 1N=one or more of: W, Bi, Mo, Li, Mg, P, Zn, Mn, Te, Ge, Nb, Zr, Cr, Al, Cu, Ce, Bn=0.0 to 0.5,and wherein the preparation of the catalyst includes contacting in an aqueous dispersion a vanadium compound and an antimony compound while said vanadium is in solution.Type: GrantFiled: June 26, 1992Date of Patent: November 2, 1993Assignee: The Standard Oil CompanyInventors: Dev D. Suresh, Michael J. Seely, Maria S. Friedrich, Christos Paparizos
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Patent number: 5235088Abstract: Olefins such as propylene and isobutylene are converted to the corresponding unsaturated nitriles, acrylonitrile, and methacrylonitrile, respectively, by reacting a mixture of the olefin, ammonia, and molecular oxygen-containing gas in the presence of a catalyst containing the oxides of molybdenum, bismuth, iron, cobalt, nickel, and chromium, and either phosphorus or antimony or mixtures thereof, and an alkali metal or mixture thereof, and optionally one element selected from the group of an alkaline earth metal, a rare earth metal, niobium, thallium, arsenic, magnesium, zinc, cadmium, vanadium, boron, calcium, tin, germanium, manganese, tungsten, tellurium, or mixtures thereof.Type: GrantFiled: May 12, 1992Date of Patent: August 10, 1993Assignee: The Standard Oil CompanyInventors: Christos Paparizos, Wilfrid G. Shaw