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US4419270A Expired / Lapsed US ⏱️ 0.0 years remaining

Oxidation catalyst

Assignee: Nippon Shokubai Co Ltd
•
Filing: 1981-06-19
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Granted: 1983-12-06
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Expires: 2001-06-19
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Abstract

Abstract A catalyst for the vapor-phase oxidation of an unsaturated hydrocarbon, alcohol, saturated aliphatic aldehyde or unsaturated aliphatic aldehyde having 4 carbon atoms, said catalyst comprising a molybdovanadophosphoric acid having X-ray diffraction lines (Cu-K.sub.α radiation) at 2θ=about 26.2°, about 10.5°, about 21.3° and about 30.3° and a crystal structure approximating that of its salt, and said catalyst having the composition represented by the general formula P.sub.a Mo.sub.b V.sub.c X.sub.d Y.sub.e O.sub.f wherein the dissociable protons of the molybdovanadophosphoric acid are omitted, X represents at least one element selected from the group consisting of sodium, potassium, rubidium, cesium, thallium, beryllium, magnesium, calcium, strontium, and barium, Y represents at least one element selected from the group consisting of copper, silver, arsenic, antimony, tellurium, cobalt, bismuth and zirconium, and the subscripts a to f represent the atomic proportions of the respective elements, provided that when b is 12, a is 0.1-3.0, c is 0-6.0 (exclusive of 0), d is 0-10.0, e is 0-5.0, and f is a value determined by the atomic valences and atomic proportions of the respective elements.

Inventors

  • 👤 Michio Ueshima
  • 👤 Yoshiyuki Takahashi
  • 👤 Ritsuo Kitada
  • 👤 Isao Nagai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 16:39
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/002; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; B01J27/199; C; C07; C07C; C07C45/00; C07C45/61; C07C45/65; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B01J2523/00

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 208 words
A catalyst for the vapor-phase oxidation of an unsaturated hydrocarbon, alcohol, saturated aliphatic aldehyde or unsaturated aliphatic aldehyde having 4 carbon atoms, said catalyst comprising molybdovanadophosphoric acid and being formed by adding a nitrogen-containing heterocyclic compound selected from the group consisting of pyridine, piperidine and piperazine to an aqueous solution of molybdovanado-phosphoric acid to form a precipitate, pelletizing, drying and calcining and has X-ray diffraction lines (Cu-K.sub.α radiation) at 2θ= about 26.2°, about 10.5°, about 21.3° and about 30.3° and a crystal structure approximating that of its salt, and said catalyst having the composition represented by the general formula P.sub.a Mo.sub.b V.sub.c X.sub.d Y.sub.e O.sub.f wherein the dissociable protons of the molybdovanadophosphoric acid are omitted, X represents at least one element selected from the group consisting of sodium, potassium, rubidium, cesium, thallium, beryllium, magnesium, calcium, strontium, and barium, Y represents at least one element selected from the group consisting of copper, silver, arsenic, antimony, tellurium, cobalt, bismuth and zirconium, and the subscripts a to f represent the atomic proportions of the respective elements, provided that when b is 12, a is 0.1-3.0, c is 0.1-6.0 d is 0-10.0 e is 0-5.0, and f is a value determined by the atomic valences and atomic proportions of the respective elements.
Claim 2
Dependent Claim 208 words
A catalyst for the vapor-phase oxidation of an unsaturated hydrocarbon, alcohol, saturated aliphatic aldehyde or unsaturated aliphatic aldehyde having 4 carbon atoms, said catalyst comprising molybdovanadophosphoric acid and being formed by adding a nitrogen-containing heterocyclic compound selected from the group consisting of pyridine, piperidine and piperazine to an aqueous solution of molybdovanado-phosphoric acid to form a precipitate, pelletizing, drying and calcining and has X-ray diffraction lines (Cu-K.sub.α radiation) at 2θ= about 26.2°, about 10.5°, about 21.3° and about 30.3° and a crystal structure approximating that of its salt, and said catalyst having the composition represented by the general formula P.sub.a Mo.sub.b V.sub.c X.sub.d Y.sub.e O.sub.f wherein the dissociable protons of the molybdovanadophosphoric acid are omitted, X represents at least one element selected from the group consisting of sodium, potassium, rubidium, cesium, thallium, beryllium, magnesium, calcium, strontium, and barium, Y represents at least one element selected from the group consisting of copper, silver, arsenic, antimony, tellurium, cobalt, bismuth and zirconium, and the subscripts a to f represent the atomic proportions of the respective elements, provided that when b is 12, a is 0.1-3.0, c is 0.1-6.0 d is 0-10.0 e is 0-5.0, and f is a value determined by the atomic valences and atomic proportions of the respective elements.
Claim 3
Dependent Claim 31 words
The catalyst of claim 1 wherein the subscripts a to f represent the following numbers: b is 12, a is 0.1-2.0, c is 0.1-4.0, d is 0-5.0, and e is 0-5.0.

References Cited (Backward Citations)

US4225466A Cited
US4273676A Cited
US4256914A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-12-05 1987-06-06 1987-12-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-12-05 1991-06-06 1991-12-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-12-05 1995-06-06 1995-12-06 $7700.00 Window Closed / Lapsed

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