Patent US4511548A successfully refreshed from Google Patents.
US4511548A
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Ammoxidation of methanol to produce hydrogen cyanide
Assignee: Standard Oil Co
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Filing: 1983-08-10
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Granted: 1985-04-16
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Expires: 2003-08-10
Abstract
Abstract Promoted antimony phosphate oxide complexes are excellent catalysts for the ammoxidation of methanol to HCN especially at high methanol throughputs.
Inventors
- 👤 T. G. Attig
- 👤 R. K. Grasselli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:40
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/002; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/1802; B01J27/186; B01J27/195; B01J27/198; C; C01; C01C; C01C3/00; C01C3/02; C01C3/0208; C01C3/0241; B01J2523/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
151 words
A process for ammoxidizing a reactant selected from the group consisting of methanol, formaldehyde and dimethyl ether to produce HCN, said process comprising contacting said reactant, ammonia and oxygen at a temperature of 200° to 600° C. in the vapor phase with an oxide complex catalyst of the formula R.sub.p X.sub.q T.sub.r Z.sub.s Fe.sub.t Sb.sub.u P.sub.v O.sub.x wherein R is one or more elements selected from Groups IA and IB of the Periodic Table and tl; X is Bi, Te or mixtures thereof; T is Cr, Co, Cu, Ce, Th, B, Sn or mixtures thereof; and Z is W, Mo, V or mixtures thereof, and further wherein p=0 to 3, q=0 to 1, r=0 to 4, s=0 to 3, t=0 to 5, u=5 to 10, v=4 to 10, and x is a number sufficient to satisfy the valence requirements of the other elements present, and wherein u/v is 1/2 to 3/2.
Claim 2
Dependent Claim
151 words
A process for ammoxidizing a reactant selected from the group consisting of methanol, formaldehyde and dimethyl ether to produce HCN, said process comprising contacting said reactant, ammonia and oxygen at a temperature of 200° to 600° C. in the vapor phase with an oxide complex catalyst of the formula R.sub.p X.sub.q T.sub.r Z.sub.s Fe.sub.t Sb.sub.u P.sub.v O.sub.x wherein R is one or more elements selected from Groups IA and IB of the Periodic Table and tl; X is Bi, Te or mixtures thereof; T is Cr, Co, Cu, Ce, Th, B, Sn or mixtures thereof; and Z is W, Mo, V or mixtures thereof, and further wherein p=0 to 3, q=0 to 1, r=0 to 4, s=0 to 3, t=0 to 5, u=5 to 10, v=4 to 10, and x is a number sufficient to satisfy the valence requirements of the other elements present, and wherein u/v is 1/2 to 3/2.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein p=0 to 1; q=0 to 0.5; r=0 to 3; s=0.05 to 1.5; and t=0.1 to 3.5
Claim 4
Dependent Claim
11 words
The process of claim 3 wherein Z is at least Mo.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein said catalyst contains an alkali metal.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein said catalyst contains bismuth.
Claim 7
Dependent Claim
10 words
The process of claim 1 wherein said reactant is methanol.
Claim 8
Dependent Claim
10 words
The process of claim 6 wherein said catalyst contains Mo.
Claim 9
Dependent Claim
10 words
The process of claim 7 wherein said catalyst contains iron.
Claim 10
Dependent Claim
33 words
The process of claim 1 wherein said reactant is methanol and further wherein propylene is also contacted with said catalyst so that methanol and propylene are simultaneously ammoxidized to HCN an acrylonitrile, respectively.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |