US3988359A
Expired / Lapsed
US
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Catalyst for use in and process for preparing acrylonitrile
Assignee: Mitsubishi Chemical Corp
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Filing: 1975-02-10
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Granted: 1976-10-26
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Expires: 1995-02-10
Abstract
Abstract A process for preparing acrylonitrile from propylene, which comprises contacting a mixture of propylene, molecular oxygen and ammonia in the vapor phase at a temperature of about 380 DEG to about 500 DEG C. and a pressure of about atmospheric pressure to about 3 Kg/cm2-G with a catalyst composition comprising active components of the following empirical formula FeaSbbMecTedQeRfOg WHEREIN Me is at least one element selected from the group consisting of V, Mo and W; Q is at least one element selected from the group consisting of Cu, Mg, Zn, La, Ce, Al, Cr, Mn, Co, Ni, Bi and Sn; and R is at least one element selected from the group consisting of P and B; a, b, c, d, e, f and g each represents atomic ratios, and when a is 10, 15</= b </=60, 1<c </=10, 0.5</= d </=10, 0.1</= e </=10, 0</= f </=5, and g represents the number of oxygen atoms corresponding to the oxides resulting from the combination of the above active components, WHEREIN THE Me and Te components are substantially dissolved in an iron-antimony oxide compound (FeSbO4) to form a solid solution when the composition is or has been, calcined finally at a temperature of about 500 DEG C. to about 900 DEG C.
Inventors
- 👤 Shigeru Saito
- 👤 Yutaka Sasaki
- 👤 Tomio Nakamura
- 👤 Kiyoshi Moriya
- 👤 Yoshimi Nakamura
- 👤 Hiroshi Utsumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:21
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/26; B; B01; B01J; B01J27/00; B01J27/02; B01J27/057; B01J27/0576; B01J27/14; B01J27/186; B01J2523/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
261 words
A process for preparing acrylonitrile from propylene, which comprises contacting a mixture of propylene, molecular oxygen and ammonia in the vapor phase at a temperature of about 380° to about 500° C and a pressure of about atmospheric pressure to about 3 Kg/cm 2 G with a catalyst composition comprising active components of the following empirical formula Fe.sub.a Sb.sub.b Me.sub.c Te.sub.d Q.sub.e R.sub.f O.sub.g wherein Me is at least one element selected from the group consisting of V, Mo and W; Q is at least one element selected from the group consisting of Cu, Mg, Zn, La, Ce, Al, Cr, Mn, Co, Ni, Bi and Sn; and R is at least one element selected from the group consisting of P and B; a, b, c, d, e, f and g each represents atomic ratios, and when a is 10, b is 15 to 60, c is 1 to 10, d is 0.5 to 10, e is 0.1 to 10, f is 0 to 5, and g represents the number of oxygen atoms corresponding to the oxides resulting from the combination of the above active components, wherein the Me and Te components are substantially dissolved in the iron-antimony oxide compound having the formula FeSbO 4 to form a solid solution when a slurry containing said components described above, the slurry being obtained by intimately mixing the Me and Te components with the Fe and Sb components along with the Q components and R components, if present, is dried and finally calcined at a temperature of about 500° C to about 900° C.
Claim 2
Dependent Claim
261 words
A process for preparing acrylonitrile from propylene, which comprises contacting a mixture of propylene, molecular oxygen and ammonia in the vapor phase at a temperature of about 380° to about 500° C and a pressure of about atmospheric pressure to about 3 Kg/cm 2 G with a catalyst composition comprising active components of the following empirical formula Fe.sub.a Sb.sub.b Me.sub.c Te.sub.d Q.sub.e R.sub.f O.sub.g wherein Me is at least one element selected from the group consisting of V, Mo and W; Q is at least one element selected from the group consisting of Cu, Mg, Zn, La, Ce, Al, Cr, Mn, Co, Ni, Bi and Sn; and R is at least one element selected from the group consisting of P and B; a, b, c, d, e, f and g each represents atomic ratios, and when a is 10, b is 15 to 60, c is 1 to 10, d is 0.5 to 10, e is 0.1 to 10, f is 0 to 5, and g represents the number of oxygen atoms corresponding to the oxides resulting from the combination of the above active components, wherein the Me and Te components are substantially dissolved in the iron-antimony oxide compound having the formula FeSbO 4 to form a solid solution when a slurry containing said components described above, the slurry being obtained by intimately mixing the Me and Te components with the Fe and Sb components along with the Q components and R components, if present, is dried and finally calcined at a temperature of about 500° C to about 900° C.
Claim 3
Dependent Claim
48 words
The process of claim 1, wherein said catalyst is calcined for about 1 to about 50 hours at a temperature of about 200° C. to about 600° C., and then for about 1 to about 50 hours at a temperature of about 500° C. to about 900° C.
Claim 4
Dependent Claim
14 words
The process of claim 1, wherein the source of said molecular oxygen is air.
Claim 5
Dependent Claim
26 words
The process of claim 1, wherein the molar ratio of propylene to oxygen to ammonia in the starting gaseous mixture is about 1:1:0.8 to about 1:4:3.
Claim 6
Dependent Claim
24 words
The process of claim 1, wherein the molar ratio of propylene to oxygen to ammonia in the starting gaseous mixture is 1:1.5:0.9 to 1:2.5:1.5.
Claim 7
Dependent Claim
14 words
The process of claim 1, wherein said catalyst is supported on a silica carrier.
Claim 8
Dependent Claim
20 words
The process of claim 5, wherein said contacting is at a temperature of about 400° C. to about 470° C.
Claim 9
Dependent Claim
22 words
The process of claim 5, wherein said contacting is at a pressure of about atmospheric pressure to about 2 Kg/cm 2 G.
Claim 10
Dependent Claim
31 words
The process of claim 1, wherein said Q components and R components are added to a slurry obtained on mixing the Me and Te components and the Fe and Sb components.
Claim 11
Dependent Claim
38 words
The process of claim 1, wherein the Q components and R components are added subsequent to the preparation of the slurry of the Me and Te components with the Fe and Sb components but prior to final calcining.
References Cited (Backward Citations)
US3668147A
Cited
US3716496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |