Patent US3989706A successfully refreshed from Google Patents.
US3989706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of pyridines
Assignee: Teijin Ltd
•
Filing: 1974-01-02
•
Granted: 1976-11-02
•
Expires: 1994-01-02
Abstract
Abstract A process for the preparation of pyridines, which comprises contacting in the vapor phase saturated or unsaturated hydrocarbon of more than one carbon atom, ammonia, and molecular oxygen, with the catalyst composed of solid acid containing at least tellurium, said solid acid containing the acid of which acid strength (Ho) is not weaker than 4.8.
Inventors
- 👤 Yataro Ichikawa
- 👤 Yuitsu Honda
- 👤 Kazuhiko Soma
- 👤 Nobuo Suzuki
- 👤 Teizo Yamaji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:48
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08; B; B01; B01J; B01J27/00; B01J27/02; B01J27/057; B01J27/0576; C07D213/09; C07D213/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
23 words
A process for the preparation of pyridines which comprises contacting, at a temperature of 200° C. to 600° C., in the vapor phase,
Claim 2
Dependent Claim
23 words
A process for the preparation of pyridines which comprises contacting, at a temperature of 200° C. to 600° C., in the vapor phase,
Claim 3
Dependent Claim
166 words
a saturated or unsaturated aliphatic or alicyclic hydrocarbon having at least 2 carbon atoms and no more than 20 carbon atoms, 2. 0.1 to 100 mols of ammonia per mol of said hydrocarbon, and 3. 0.1 to 100 mols of molecular oxygen per mol of said hydrocarbon, 4. in the presence of a catalyst composed of a solid acid containing, in the form of the metal or metal oxide: i. tellurium, ii. at least one metal selected from the group consisting of antimony, iron, cobalt, nickel, manganese, tungsten, rhenium, titanium, aluminum, germanium, tin, lead, arsenic and zirconium, and iii. at least one metal selected from the group consisting of nickel, titanium, germanium, arsenic, indium, platinum, osmium, semarium, niobium, phosphorus and bismuth, 5. wherein the ratio by weight of tellurium to the solid acid, calculated on the basis of tellurium to oxide, is 1:100 to 10:1, said solid acid containing at least 0.01 mmol/g of a solid acid having an acid strength (Ho) not weaker than 4.8.
Claim 4
Dependent Claim
166 words
a saturated or unsaturated aliphatic or alicyclic hydrocarbon having at least 2 carbon atoms and no more than 20 carbon atoms, 2. 0.1 to 100 mols of ammonia per mol of said hydrocarbon, and 3. 0.1 to 100 mols of molecular oxygen per mol of said hydrocarbon, 4. in the presence of a catalyst composed of a solid acid containing, in the form of the metal or metal oxide: i. tellurium, ii. at least one metal selected from the group consisting of antimony, iron, cobalt, nickel, manganese, tungsten, rhenium, titanium, aluminum, germanium, tin, lead, arsenic and zirconium, and iii. at least one metal selected from the group consisting of nickel, titanium, germanium, arsenic, indium, platinum, osmium, semarium, niobium, phosphorus and bismuth, 5. wherein the ratio by weight of tellurium to the solid acid, calculated on the basis of tellurium to oxide, is 1:100 to 10:1, said solid acid containing at least 0.01 mmol/g of a solid acid having an acid strength (Ho) not weaker than 4.8.
Claim 5
Dependent Claim
25 words
The process of claim 1 wherein the solid acid contains at least 0.1 mmol/g of an acid having an acid strength not weaker than 4.8.
Claim 6
Dependent Claim
21 words
The process according to claim 1 wherein the solid acid contains an acid whose acid strength is not weaker than 4.0.
Claim 7
Dependent Claim
25 words
The process of claim 1 wherein the solid acid contains at least one element selected from the group consisting of silicon, titanium, zirconium and zinc.
Claim 8
Dependent Claim
86 words
The process of claim 1 wherein the solid acid contains at least one metal or metal oxide selected from the group consisting of silica (SiO 2 ), silica-alumina (SiO 2 -Al 2 O 3 ), silica-titania (SiO 2 -TiO 2 ), silica-zirconia (SiO 2 -ZrO 2 ), silica-tin oxide (SiO 2 -SnO 2 ), silica-iron oxide, silica-magnesia (SiO 2 -MgO), silica-lanthania (SiO 2 -La 2 O 3 ), silica-gellium oxide (NiO 2 -Ga 2 O 3 ), titanium-phosphorus oxides, zirconium-phosphorus oxides, silica-titanium-phosphorus oxides, and silica-zirconium-phosphorus oxides.
Claim 9
Dependent Claim
11 words
The process of claim 1 wherein said metal (ii) is antimony.
Claim 10
Dependent Claim
32 words
The process of claim 1 wherein said solid acid contains silica-alumina at a weight ratio of aluminia (Al 2 O 3 ) to silica (SiO 2 ) of from 0.0001:1 to 1:1.
Claim 11
Dependent Claim
36 words
The process of claim 1 wherein the atomic ratio of the metal component (ii) to tellurium is from 1:100 to 600:100 and the atomic ratio of metal component (iii) to tellurium is from 0.1:100 to 100:100.
References Cited (Backward Citations)
US3164626A
Cited
US3164627A
Cited
US3226421A
Cited
US3228890A
Cited
US3290354A
Cited
US3335169A
Cited
US3326961A
Cited
US3417125A
Cited
US3392188A
Cited
US3396189A
Cited
US3392189A
Cited
US3426060A
Cited
US3426059A
Cited
US3445501A
Cited
US3445521A
Cited
US3625867A
Cited
US3686265A
Cited
US3641102A
Cited
US3784560A
Cited
US3833638A
Cited
US3803207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |