Patent US4070393A successfully refreshed from Google Patents.
US4070393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammoxidation process
Assignee: Sun Ventures Inc
•
Filing: 1976-06-01
•
Granted: 1978-01-24
•
Expires: 1996-06-01
Abstract
Abstract In an ammoxidation process where reactant gases comprised of a lower alkyl-substituted aromatic hydrocarbon, oxygen, and ammonia are passed over an ammoxidation catalyst in a fixed or fluidized bed system, the improvement of reducing combustion of hydrocarbon and ammonia and achieving a more favorable product distribution by distributing a stream containing reactant oxygen throughout the catalyst bed.
Inventors
- 👤 Howard P. Angstadt
- 👤 Jack D. Tinkler
- 👤 Richard V. Norton
- 👤 Ronald D. Bushick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:22
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/28; B; B01; B01J; B01J8/00; B01J8/02; B01J8/0278; B01J2219/00; B01J2219/19; B01J2219/194; B01J2219/1941; B01J2219/1946
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
56 words
In an ammoxidation process where reactant gases comprised of a lower alkyl-substituted hydrocarbon, oxygen, and ammonia are passed over an ammoxidation catalyst in a fixed or fluidized bed system, the improvement of reducing combustion of hydrocarbon and ammonia burn by distributing said reactant oxygen at a multiplicity of positions along the length of said catalyst bed.
Claim 2
Dependent Claim
56 words
In an ammoxidation process where reactant gases comprised of a lower alkyl-substituted hydrocarbon, oxygen, and ammonia are passed over an ammoxidation catalyst in a fixed or fluidized bed system, the improvement of reducing combustion of hydrocarbon and ammonia burn by distributing said reactant oxygen at a multiplicity of positions along the length of said catalyst bed.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the ammoxidation is carried out under pressure of from 2 to about 10 atmospheres.
Claim 4
Dependent Claim
18 words
The process of claim 2 wherein the hydrocarbon is an aromatic hydrocarbon of the benzene of naphthalene series.
Claim 5
Dependent Claim
12 words
The process of claim 3 where the aromatic hydrocarbon is a xylene.
Claim 6
Dependent Claim
11 words
The process of claim 3 where the aromatic hydrocarbon is p-xylene.
Claim 7
Dependent Claim
97 words
A process for the preparation of an aromatic dinitrile of the benzene and naphthalene series which comprises reacting a lower alkyl-substituted hydrocarbon of the benzene or naphthalene series with ammonia and oxygen at a temperature of between about 350° and about 525° C in the presence of a supported vanadium catalyst in a fixed bed, the mole ratio of ammonia to hydrocarbon being from about 2:1 to about 3:1, the mole ratio of oxygen to hydrocarbon being from about 2:1 to about 3:1, and distributing the oxygen through spaced apart inlets along the length of the bed.
Claim 8
Dependent Claim
97 words
A process for the preparation of an aromatic dinitrile of the benzene and naphthalene series which comprises reacting a lower alkyl-substituted hydrocarbon of the benzene or naphthalene series with ammonia and oxygen at a temperature of between about 350° and about 525° C in the presence of a supported vanadium catalyst in a fixed bed, the mole ratio of ammonia to hydrocarbon being from about 2:1 to about 3:1, the mole ratio of oxygen to hydrocarbon being from about 2:1 to about 3:1, and distributing the oxygen through spaced apart inlets along the length of the bed.
Claim 9
Dependent Claim
10 words
The process of claim 6 where the hydrocarbon is p-xylene.
Claim 10
Dependent Claim
98 words
A process for the preparation of terephthalonitrile which comprises reacting p-xylene in a fixed bed mode with ammonia and oxygen at a temperature between about 390° and about 500° C and at a pressure of from about 2 to about 10 atmospheres in the presence of a vanadium bronze catalyst said mole ratio of ammonia to p-xylene being from about 2:1 to about 3:1, the mole ratio of oxygen to hydrocarbon being from about 2:1 to about 3:1, and distributing the oxygen throughout the bed by passing said oxygen through spaced-apart inlets along the length of the bed.
Claim 11
Dependent Claim
98 words
A process for the preparation of terephthalonitrile which comprises reacting p-xylene in a fixed bed mode with ammonia and oxygen at a temperature between about 390° and about 500° C and at a pressure of from about 2 to about 10 atmospheres in the presence of a vanadium bronze catalyst said mole ratio of ammonia to p-xylene being from about 2:1 to about 3:1, the mole ratio of oxygen to hydrocarbon being from about 2:1 to about 3:1, and distributing the oxygen throughout the bed by passing said oxygen through spaced-apart inlets along the length of the bed.
Claim 12
Dependent Claim
17 words
The process of claim 8 operated at a pressure of from about 2 to about 5 atmospheres.
Claim 13
Dependent Claim
15 words
The process of claim 9 wherein said catalyst is a sodium-vanadium bronze supported on α-alumina.
Claim 14
Dependent Claim
97 words
A process for the preparation of an aromatic dinitrile of the benzene and naphthalene series which comprises reacting a lower alkyl-substituted hydrocarbon of the benzene or naphthalene series with ammonia and oxygen at a temperature of between about 350° and about 525° C in the presence of a supported vanadium catalyst in a fluidized bed, the mole ratio of ammonia to hydrocarbon being from about 2:1 to about 3:1, the mole ratio of oxygen to hydrocarbon being from about 2:1 to about 3:1, and distributing the oxygen through spaced apart inlets along the length of the bed.
Claim 15
Dependent Claim
97 words
A process for the preparation of an aromatic dinitrile of the benzene and naphthalene series which comprises reacting a lower alkyl-substituted hydrocarbon of the benzene or naphthalene series with ammonia and oxygen at a temperature of between about 350° and about 525° C in the presence of a supported vanadium catalyst in a fluidized bed, the mole ratio of ammonia to hydrocarbon being from about 2:1 to about 3:1, the mole ratio of oxygen to hydrocarbon being from about 2:1 to about 3:1, and distributing the oxygen through spaced apart inlets along the length of the bed.
Claim 16
Dependent Claim
98 words
A process for the preparation of terephthalonitrile which comprises reacting p-xylene in a fluidized bed mode with ammonia and oxygen at a temperature between about 390° and about 500° C and at a pressure of from about 2 to about 10 atmospheres in the presence of a vanadium bronze catalyst said mole ratio of ammonia to p-xylene being from about 2:1 to about 3:1, the mole ratio of oxygen to hydrocarbon being from about 2:1 to about 3:1, and distributing the oxygen throughout the bed by passing said oxygen through spaced-apart inlets along the length of the bed.
Claim 17
Dependent Claim
98 words
A process for the preparation of terephthalonitrile which comprises reacting p-xylene in a fluidized bed mode with ammonia and oxygen at a temperature between about 390° and about 500° C and at a pressure of from about 2 to about 10 atmospheres in the presence of a vanadium bronze catalyst said mole ratio of ammonia to p-xylene being from about 2:1 to about 3:1, the mole ratio of oxygen to hydrocarbon being from about 2:1 to about 3:1, and distributing the oxygen throughout the bed by passing said oxygen through spaced-apart inlets along the length of the bed.
Claim 18
Dependent Claim
29 words
The process of claim 12 where the catalyst is a sodium-vanadium bronze supported on α-alumina and the pressure of the reaction is from about 2 to about 5 atmospheres.
Claim 19
Dependent Claim
15 words
The process of claim 13 where the fluidized bed is in a baffled conical reactor.
References Cited (Backward Citations)
US3501517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |