Patents by Inventor Hiromichi Ishii

Hiromichi Ishii 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).

  • Patent number: 4985592
    Abstract: The gas phase catalytic oxidation of an unsaturated aldehyde with molecular oxygen at 200.degree. to 500.degree. C. to give the corresponding unsaturated carboxylic acid is conducted in the presence of a catalyst represented by the following formula:Mo.sub.12 P.sub.a X.sub.b Y.sub.c Z.sub.d O.sub.ewherein the subscripts represent the atomic ratios of each component and a is 0.5 to 6, b is 0.001 to 6, c is 0.2 to 6, d is 0 to 6, and e is a value determined by the valencies of the elements present in the catalyst; and Mo is molybdenum, P is phosphorus, O is oxygen, X is at least one metal selected from the group consisting of rhodium, cerium and zirconium, Y is at least one alkali metal selected from the group consisting of potassium, rubidium and cesium, and Z is at least one metal selected from the group consisting of iron, cobalt, nickel, zinc, antimony, silicon, bismuth, cadmium, uranium, manganese, copper, vanadium, niobium and tantalum.
    Type: Grant
    Filed: October 17, 1978
    Date of Patent: January 15, 1991
    Assignee: Mitsubishi Rayon Company, Ltd.
    Inventors: Hiromichi Ishii, Hideo Matsuzawa, Masao Kobayashi, Kazuhiro Ishii
  • Patent number: 4380664
    Abstract: At least one olefinic hydrocarbon of 3 to 4 carbon atoms is oxidized catalytically in the gas phase in the presence of molecular oxygen at 200.degree.-450.degree. C. to produce the corresponding aldehyde and acid over a calcined catalyst of the formula Mo.sub.a Sb.sub.b Bi.sub.c Fe.sub.d Ni.sub.e Sn.sub.f X.sub.g Y.sub.h O.sub.i wherein X is at least one alkali metal selected from the group consisting of potassium, rubidium and cesium; Y is at least one metal selected from the group consisting of cobalt, uranium, germanium, tungsten and titanium; a to h are atomic ratios wherein a=12, b=0.2 to 20, c=0.2 to 12, d=0.2 to 12, e=0.2 to 12, f=0 to 20, g=0.01 to 4 and h=0 to 6; and i is determined according to the oxidation states of the metal atoms in the catalyst.
    Type: Grant
    Filed: March 29, 1978
    Date of Patent: April 19, 1983
    Assignee: Mitsubishi Rayon Company, Ltd.
    Inventors: Hiromichi Ishii, Hideo Matsuzawa, Masao Kobayashi, Kantaro Yamada
  • Patent number: 4341900
    Abstract: The gas phase catalytic oxidation of an unsaturated aldehyde with molecular oxygen at 240.degree. to 450.degree. C. to give the corresponding unsaturated carboxylic acid is conducted in the presence of a catalyst of the following formula:Mo.sub.12 P.sub.a Q.sub.b R.sub.c X.sub.d Y.sub.e Z.sub.f O.sub.gwherein Mo is molybdenum, P is phosphorus, O is oxygen, Q is calcium and/or magnesium, R is at least one metal element selected from the group consisting of potassium, rubidium, cesium and thallium, X is at least one element selected from the group consisting of boron, silicon, manganese, iron, cobalt, zinc, germanium, uranium, tin, lead, chromium, titanium, tantalum, antimony, niobium and bismuth, Y is at least one metal element selected from the group consisting of vanadium, copper and nickel, Z is strontium and/or barium, and wherein the subscripts represent the atomic ratio of each component and a is 0.5 to 6, b is 0.2 to 6, c is 0.2 to 6, d is 0.
    Type: Grant
    Filed: March 3, 1976
    Date of Patent: July 27, 1982
    Assignee: Mitsubishi Rayon Company, Limited
    Inventors: Hiromichi Ishii, Hideo Matsuzawa, Masao Kobayashi, Masato Otani
  • Patent number: 4219670
    Abstract: An olefin having 4 carbon atoms or t-butyl alcohol is catalytically oxidized in the gas phase with molecular oxygen at 200.degree. to 450.degree. C. to give the corresponding unsaturated aldehyde, unsaturated carboxylic acid and/or conjugated diene in the presence of a catalyst having the formula:Mo.sub.a Sb.sub.b Bi.sub.c Fe.sub.c Ni.sub.e Co.sub.f Sn.sub.g X.sub.h Y.sub.i O.sub.jwherein a to j represent the atomic ratio of each component and a is 12, b is 0.2 to 20, c is 0.2 to 12, d is 0.2 to 12, e is 0.2 to 12, f is 0 to 20, g is 0 to 20, h is 0.01 to 4, i is 0.01 to 4 and j is a value determined by the valencies of the elements in the catalyst, and wherein X is at least one metal selected from the group consisting of potassium, rubidium, cesium and thallium, and Y is at least one metal selected from the group consisting of selenium, tellurium, gallium, vanadium, ruthenium, zinc, niobium, magnesium, chromium, manganese, cadmium and tantalum.
    Type: Grant
    Filed: March 14, 1978
    Date of Patent: August 26, 1980
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Kazuya Okada, Hideo Matsuzawa, Hiromichi Ishii, Masao Kobayashi
  • Patent number: 4165296
    Abstract: A phosphorus-molybdenum-alkali metal-containing catalyst for the gas-phase oxidation of an unsaturated aldehyde to an unsaturated carboxylic acid is regenerated by treating it with an aqueous solution containing ammonia and hydrogen peroxide or ozone.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: August 21, 1979
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiromichi Ishii, Hideo Matsuzawa, Masao Kobayashi, Masaaki Kato
  • Patent number: 4118419
    Abstract: The gas phase catalytic oxidation of an unsaturated aldehyde with molecular oxygen at 240.degree. to 450.degree. C to the corresponding unsaturated carboxylic acid is conducted in the presence of a catalyst of the formula:P.sub.a Mo.sub.b Bi.sub.c Sb.sub.d X.sub.e Y.sub.f O.sub.gwherein Mo is molybdenum, P is phosphorus, Bi is bismuth, Sb is antimony, O is oxygen, X is at least one element selected from the group consisting of potassium rubidium, cesium and thallium; and Y is at least one element selected from the group consisting of cobalt, zinc, niobium, chromium, nickel, iron, silicon, tantalum, cadmium, uranium, manganese, copper, thorium, selenium, aluminum, titanium, tungsten and cerium, and wherein the subscripts a-g represent the atomic ratio of each component such that a is 0.5 to 6, b is 12, c is 0.01 to 6, d is 0.01 to 12, e is 0.2 to 6, f is 0.01 to 6, and g is a value which is determined by the valencies of the elements present in the catalyst.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: October 3, 1978
    Assignee: Mitsubishi Rayon Company, Ltd.
    Inventors: Kazuhiro Ishii, Hideo Matsuzawa, Masao Kobayashi, Hiromichi Ishii
  • Patent number: 4111984
    Abstract: At least one compound from the group of unsaturated hydrocarbons of three to four carbon atoms and t-butyl alcohol is oxidized catalytically in the gas phase in the presence of molecular oxygen at 200.degree.-450.degree. C to produce the corresponding aldehyde or acid over a calcined catalyst of the formula Mo.sub.a Sb.sub.b Bi.sub.c Fe.sub.d Ni.sub.e Sn.sub.f X.sub.g Y.sub.h O.sub.i wherein X is at least one of potassium, rubidium or cesium, Y is at least one of cobalt, uranium, germanium, tungsten or titanium, a to h are atomic ratios wherein a=12, b=0.2 to 20, c=0.2 to 12, d=0.2 to 12, e=0.2 to 12, f=0 to 20, g=0.01 to 4 and h=0 to 6 and i is a value determined by the oxidation state of the metal atoms in the catalyst.An embodiment of the calcined catalyst of the invention has the formula Mo.sub.a Sb.sub.b Bi.sub.c Fe.sub.d Ni.sub.e Sn.sub.f X.sub.g Y.sub.h Z.sub.j O.sub.i wherein X and y are as defined above and Z is palladium and a to j are atomic ratios wherein a=12, b=0.2 to 20, c=0.2 to 12, d=0.
    Type: Grant
    Filed: March 16, 1976
    Date of Patent: September 5, 1978
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiromichi Ishii, Hideo Matsuzawa, Masao Kobayashi, Kantaro Yamada
  • Patent number: 4111985
    Abstract: An olefin having 4 carbon atoms or t-butyl alcohol is catalytically oxidized in the gas phase with molecular oxygen at 200 to 450.degree. C to give the corresponding unsaturated aldehyde, unsaturated carboxylic acid and/or conjugated diene in the presence of a catalyst having the formula:Mo.sub.a Sb.sub.b Bi.sub.c Fe.sub.d Ni.sub.e Co.sub.f Sn.sub.g X.sub.h Y.sub.i O.sub.jwherein a to j represent the atomic ratio of each component and a is 12, b is 0.2 to 20, c is 0.2 to 12, d is 0.2 to 12, e is 0.2 to 12, f is 0 to 20, g is 0 to 20, h is 0.01 to 4, i is 0.01 to 4 and j is a value determined by the valencies of the elements in the catalyst, and wherein X is at least one metal selected from the group consisting of potassium, rubidium, cesium and thallium, and Y is at least one metal selected from the group consisting of selenium, tellurium, gallium, vanadium, ruthenium, zinc, niobium, magnesium, chromium, manganese, cadmium and tantalum.
    Type: Grant
    Filed: November 12, 1976
    Date of Patent: September 5, 1978
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Kazuya Okada, Hideo Matsuzawa, Hiromichi Ishii, Masao Kobayashi
  • Patent number: 4051179
    Abstract: The gas phase catalytic oxidation of an unsaturated aldehyde with molecular oxygen at 240.degree. to 390.degree. C to give the corresponding unsaturated carboxylic acid is conducted in the presence of a catalyst represented by the following formula:P.sub.a Mo.sub.b As.sub.c X.sub.d Y.sub.e Z.sub.f O.sub.gwherein a, b, c, d, e, f and g represent the atomic ratio of each component and a is 0.03 to 0.2, b is 1, c is 0.015 to 0.15, d is 0.003 to 1, e is 0.003 to 0.417, f is 0.003 to 1, and g is a value determined by the valencies of the elements present in the catalyst; and wherein X is copper, vanadium or mixtures thereof Y is at least one alkali metal selected from the group consisting of lithium, sodium, potassium, rubidium and cesium, and Z is at least one metal selected from the group consisting of magnesium, aluminum, calcium, titanium, zirconium, silver, antimony, tellurium, barium, tantalum and silicon.
    Type: Grant
    Filed: March 17, 1976
    Date of Patent: September 27, 1977
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiroshi Sonobe, Masaaki Kato, Hideo Matsuzawa, Hiromichi Ishii, Masao Kobayashi
  • Patent number: 4042625
    Abstract: Acrylic acid or methacrylic acid is prepared by vapor-phase catalytic oxidation of acrolein or methacrolein, with molecular oxygen at a temperature of from 240.degree. to 450.degree. C in the presence of a catalyst represented by the formula:Mo.sub.12 P.sub.a Mg.sub.b Q.sub.b.sub.' R.sub.c T.sub.d O.sub.ewherein Mo is molybdenum, P is phosphorus, Mg magnesium, O is oxygen, Q is at least one of calcium, strontium, and barium, R is at least one of potassium, rubidium, cesium and thallium, T is at least one of vanadium, tungsten and nickel, and a, b, c, d, and e are atomic ratios of the respective elements, where a=0.5-6, b=0.2-6, b+b'= 0.2-6, b' ranges from 0 to a value determined by the magnesium content of the catalyst and the limits of b+b', c=0.2-6, d=0-6, and e is a value dependent upon the oxidation state of the catalyst.
    Type: Grant
    Filed: June 25, 1975
    Date of Patent: August 16, 1977
    Assignee: Mitsubishi Rayon Company, Ltd.
    Inventors: Hideo Matsuzawa, Masato Otani, Hiromichi Ishii, Kantaro Yamada, Hasao Kobayashi
  • Patent number: 4035418
    Abstract: An olefin having 4 carbon atoms or t-butyl alcohol is catalytically oxidized in the gas phase with molecular oxygen at 200.degree. to 450.degree. C to give the corresponding unsaturated aldehyde, unsaturated carboxylic acid and/or conjugated diene in the presence of a catalyst having the formula:Mo.sub.a Sb.sub.b Bi.sub.c Fe.sub.d Ni.sub.e Co.sub.f Sn.sub.g X.sub.h Y.sub.i O.sub.jwherein a to j represent the atomic ratio of each component and a is 12, b is 0.2 to 20, c is 0.2 to 12, d is 0.2 to 12, e is 0.2 to 12, f is 0 to 20, g is 0 to 20, h is 0.01 to 4, i is 0.01 to 4 and j is a value determined by the valencies of the elements in the catalyst, and wherein X is at least one metal selected from the group consisting of potassium, rubidium, cesium and thallium, and Y is at least one metal selected from the group consisting of selenium, tellurium, gallium, vanadium, ruthenium, zinc, niobium, magnesium, chromium, manganese, cadmium and tantalum.
    Type: Grant
    Filed: March 3, 1976
    Date of Patent: July 12, 1977
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Kazuya Okada, Hideo Matsuzawa, Hiromichi Ishii, Masao Kobayashi
  • Patent number: 3998876
    Abstract: The gas phase catalytic oxidation of an unsaturated aldehyde with molecular oxygen at 240.degree. to 390.degree. C to give the corresponding unsaturated carboxylic acid is conducted in the presence of a catalyst represented by the following formula:P.sub.a Mo.sub.b As.sub.c (NH.sub.4).sub.d X.sub.e Y.sub.f O.sub.gwherein a, b, c, e, f and g represent the atomic ratio of each component and a is 0.03 to 0.2, b is 1, c is 0.015 to 0.15, e is 0.003 to 1, f is 0 to 0.17, g is a value determined by the valencies of the elements present in the catalyst, and d designates the number of ammonium groups which are within the range of 0.01 to 0.3, and wherein X is at least one metal selected from the group consisting of vanadium, tungsten, copper, iron, manganese and tin, and Y is at least one alkali metal element selected from the group consisting of lithium, sodium, potassium, rubidium and cesium.
    Type: Grant
    Filed: January 31, 1975
    Date of Patent: December 21, 1976
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Masaaki Kato, Hiroshi Sonobe, Hiromichi Ishii, Masao Kobayashi, Kantaro Yamada
  • Patent number: 3972920
    Abstract: Methacrolein is produced by catalytically oxidizing t-butyl alcohol with oxygen by using a catalyst system of MoSbBiFeNi-alkali. Propylene or isobutylene can also be catalytically oxidized with the same catalyst system to produce acrolein or methacrolein. Methacrolein and 1,3-butadiene can simultaneously be produced by catalytically oxidizing a mixture of isobutylene and n-butene with the same catalyst.
    Type: Grant
    Filed: May 29, 1974
    Date of Patent: August 3, 1976
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiromichi Ishii, Hideo Matsuzawa, Masao Kobayashi, Kantaro Yamada
  • Patent number: 3954856
    Abstract: Oxidation of tert.-butyl alcohol is accomplished by contacting said alcohol with a tungsten-molybdenum-tellurium-nickel catalyst in the vapor phase at an elevated temperature in the presence of oxygen, in order to produce methacrolein and methacrylic acid. The catalyst desirably contains phosphorus and/or antimony in addition to the elements mentioned above.
    Type: Grant
    Filed: August 29, 1974
    Date of Patent: May 4, 1976
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Masao Kobayashi, Hideo Matsuzawa, Kantaro Yamada, Hiromichi Ishii