Patent US4062885A successfully refreshed from Google Patents.
US4062885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing phthalonitrile
Assignee: Individual
•
Filing: 1976-06-17
•
Granted: 1977-12-13
•
Expires: 1996-06-17
Abstract
Abstract A process for producing phthalonitrile, which comprises reacting o-xylene with ammonia in the presence of oxygen or a mixture thereof with inert gases and a catalyst; as the latter use is made of a mixture of oxides of bismuth, antimony, molybdenum and chromium taken in a molar ratio of 1-15:1-10:0.5-5:0.5-20 respectively or a mixture of oxides of bismuth, antimony, molybdenum and vanadium taken in a molar ratio of 1-20:1-10:0.1-15:1-20 respectively deposited onto a support.
Inventors
- 👤 Soltan Dzhafarovich Mekhtiev
- 👤 Ramiz Gasan Kuli Ogly Rizaev
- 👤 Adilya Shir Mamed Kyzy Novruzova
- 👤 Roida Jusuf Kyzy Magerramova
- 👤 Geibat Nagmetovich Suleimanov
- 👤 Murshud Sary Ogly Rafiev
- 👤 Fikret Dzhabrail Ogly Guseinov
- 👤 Viktor Efimovich Sheinin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:50
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/28; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/31
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
A process for producing phthalonitrile comprising reacting o-xylene with ammonia at a temperature ranging from 350° to 550° C in the presence of oxygen or a mixture thereof with inert gases and a catalyst selected from the group consisting of a mixture of oxides of bismuth, antimony, molybdenum and chromium taken in a molar ratio of 1-15:1-10:0.5-5:0.5-20 respectively, and a mixture of oxides of bismuth, antimony, molybdenum and vanadium taken in a molar ratio of 1-20:1-10:0.1-15:1-20 respectively, deposited onto a support, followed by isolation of the desired product.
Claim 2
Dependent Claim
88 words
A process for producing phthalonitrile comprising reacting o-xylene with ammonia at a temperature ranging from 350° to 550° C in the presence of oxygen or a mixture thereof with inert gases and a catalyst selected from the group consisting of a mixture of oxides of bismuth, antimony, molybdenum and chromium taken in a molar ratio of 1-15:1-10:0.5-5:0.5-20 respectively, and a mixture of oxides of bismuth, antimony, molybdenum and vanadium taken in a molar ratio of 1-20:1-10:0.1-15:1-20 respectively, deposited onto a support, followed by isolation of the desired product.
Claim 3
Dependent Claim
37 words
A process as claimed in claim 1, wherein as the catalyst use is made of a mixture of oxides of bismuth, antimony, molybdenum and chromium taken in the molar ratio of 1:2:2.5:0.5 respectively deposited onto a support.
Claim 4
Dependent Claim
37 words
A process as claimed in claim 1, wherein as the catalyst use is made of a mixture of oxides of bismuth, antimony, molybdenum and vanadium taken in the molar ratio of 1:2.5:1:2 respectively deposited onto a support.
Claim 5
Dependent Claim
35 words
A process as claimed in claim 1, wherein use is made of a support selected from the group consisting of alumina calcined at a temperature ranging from 800° to 1,000° C, silica gel and alumosilicate.
References Cited (Backward Citations)
US3393220A
Cited
US3870743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |