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Patent US4438217A successfully refreshed from Google Patents.
US4438217A
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Catalyst for oxidation of propylene
Assignee: Nippon Shokubai Co Ltd
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Filing: 1982-12-30
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Granted: 1984-03-20
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Expires: 2002-12-30
Abstract
Abstract A catalyst for the oxidation of propylene, said catalyst having the composition represented by the following formula MoaWbBicFedAeBfCgDhOx wherein A represents at least one element selected from the group consisting of nickel and cobalt, B represents at least one element selected from the group consisting of alkali metals, alkaline earth metals and thallium, C represents at least one element selected from the group consisting of phosphorus, arsenic, boron and niobium, D represents at least one element selected from the group consisting of silicon, aluminum and titanium, a, b, c, d, e, f, g, h, and x respectively represent the atomic ratios of Mo, W, Bi, Fe, A, B, C, D, and O, a is from 2 to 12, b is from 0 to 10, the sum of a and b is 12, c is from 0.1 to 10.0, d is from 0.1 to 10.
Inventors
- 👤 Masahiro Takata
- 👤 Ryuji Aoki
- 👤 Takahisa Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:36
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8872; C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35; B01J23/8874; B01J23/8876; B01J23/8877; B01J35/00; B01J35/50; B01J35/55; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B01J2523/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
229 words
A catalyst for the oxidation of propylene, said catalyst having the composition represented by the following formula Mo.sub.a W.sub.b Bi.sub.c Fe.sub.d A.sub.e B.sub.f C.sub.g D.sub.h O.sub.x wherein A represents at least one element selected from the group consisting of nickel and cobalt, B represents at least one element selected from the group consisting of alkali metals, alkaline earth metals and thallium, C represents at least one element selected from the group consisting of phosphorus, arsenic, boron and niobium, D represents at least one element selected from the group consisting of silicon, aluminum and titanium, a, b, c, d, e, f, g, h, and x respectively represent the atomic ratios of Mo, W, Bi, Fe, A, B, C, D, and O, a is from 2 to 12 b is from 0 to 10, the sum of a and b is 12, c is from 0.1 to 10.0, d is from 0.1 to 10.0, e is from 2 to 20, f is from 0.005 to 3.0, g is from 0 to 4, h is from 0.5 to 15 and X is a number determined by the atomic valences of the individual elements, and being molded in the shape of a hollow cylinder having an outside diameter of 3.0 to 10.0 mm, an inside diameter 0.1 to 0.7 times the outside diameter and a length 0.5 to 2.0 times the outside diameter.
Claim 2
Dependent Claim
229 words
A catalyst for the oxidation of propylene, said catalyst having the composition represented by the following formula Mo.sub.a W.sub.b Bi.sub.c Fe.sub.d A.sub.e B.sub.f C.sub.g D.sub.h O.sub.x wherein A represents at least one element selected from the group consisting of nickel and cobalt, B represents at least one element selected from the group consisting of alkali metals, alkaline earth metals and thallium, C represents at least one element selected from the group consisting of phosphorus, arsenic, boron and niobium, D represents at least one element selected from the group consisting of silicon, aluminum and titanium, a, b, c, d, e, f, g, h, and x respectively represent the atomic ratios of Mo, W, Bi, Fe, A, B, C, D, and O, a is from 2 to 12 b is from 0 to 10, the sum of a and b is 12, c is from 0.1 to 10.0, d is from 0.1 to 10.0, e is from 2 to 20, f is from 0.005 to 3.0, g is from 0 to 4, h is from 0.5 to 15 and X is a number determined by the atomic valences of the individual elements, and being molded in the shape of a hollow cylinder having an outside diameter of 3.0 to 10.0 mm, an inside diameter 0.1 to 0.7 times the outside diameter and a length 0.5 to 2.0 times the outside diameter.
Claim 3
Dependent Claim
33 words
The catalyst of claim 1 wherein (D-d)/2 where D is the outside diameter of the hollow cylinder and d is the inside diameter of the hollow cylinder is from 1.0 to 4.0 mm.
Claim 4
Dependent Claim
43 words
The catalyst of claim 1 wherein c is from 0.5 to 5.0, d is from 0.5 to 5.0, e is from 3 to 15, f is from 0.01 to 2.5, g is from 0 to 2, and h is from 1 to 10.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |