US3917542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for the production of pyridine and 3-methylpyridine
Assignee: Evonik Operations GmbH
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Filing: 1973-08-08
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Granted: 1975-11-04
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Expires: 1993-08-08
Abstract
Abstract Compounds of Al, F and O and at least one element of the second main group of the periodic system are heated at 550* to 1200* C. to render them suitable as catalysts for the reaction of acrolein with ammonia to form pyridine and 3-methylpyridine.
Inventors
- 👤 Helmut Beschke
- 👤 Axel Kleemann
- 👤 Gerd Schreyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:06
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08; C07D213/09; C07D213/12; B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; B01J27/12; B01J37/00; B01J37/12; B01J37/14
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
140 words
A CATALYST SUITABLE FOR THE REACTION OF ACROLEIN WITH AMMONIA TO FORM PYRIDINE AND 3-METHYLPYRIDINE, SAID CATALYST HAVING BEEN PREPARED BY HEATING AT 600* TO 800*C IN THE PRESENCE OF GASEOUS OXYGEN (1) ALUMINUM METAL, ALUMINUM OXIDE OR A COMPOUND OF ALUMINUM CONVERTIBLE TO THE OXIDE UPON HEATING WITH GASEOUS OXYGEN AT 600* TO 800*C., (2) AMMONIUM FLUORIDE, HYDROGEN FLUORIDE OR A FLUORIE OF AN ELEMENT OF THE SECOND MAIN GROUP OF THE PERIODIC SYSTEM AND (3) AT LEAST ONE ELEMENT OF THE SECOND MAIN GROUP OF THE PERIODIC SYSTEM, THE OXIDE OF SAID ELEMENT OR A COMPOUND OF SAID ELEMENT CONVERTIBLE TO THE OXIDE IN THE PRESENCE OF GASEOUS OXYGEN AT A TEMPERATURE OF 60* TO 800*C., SAID CATALYST CONSISTING ESSENTIALLY OF THE ELEMENTS AL, F, O AND THE ELEMENT OF THE SECOND MAIN GROUP OF THE PERIODIC SYSTEM.
Claim 2
Dependent Claim
140 words
A CATALYST SUITABLE FOR THE REACTION OF ACROLEIN WITH AMMONIA TO FORM PYRIDINE AND 3-METHYLPYRIDINE, SAID CATALYST HAVING BEEN PREPARED BY HEATING AT 600* TO 800*C IN THE PRESENCE OF GASEOUS OXYGEN (1) ALUMINUM METAL, ALUMINUM OXIDE OR A COMPOUND OF ALUMINUM CONVERTIBLE TO THE OXIDE UPON HEATING WITH GASEOUS OXYGEN AT 600* TO 800*C., (2) AMMONIUM FLUORIDE, HYDROGEN FLUORIDE OR A FLUORIE OF AN ELEMENT OF THE SECOND MAIN GROUP OF THE PERIODIC SYSTEM AND (3) AT LEAST ONE ELEMENT OF THE SECOND MAIN GROUP OF THE PERIODIC SYSTEM, THE OXIDE OF SAID ELEMENT OR A COMPOUND OF SAID ELEMENT CONVERTIBLE TO THE OXIDE IN THE PRESENCE OF GASEOUS OXYGEN AT A TEMPERATURE OF 60* TO 800*C., SAID CATALYST CONSISTING ESSENTIALLY OF THE ELEMENTS AL, F, O AND THE ELEMENT OF THE SECOND MAIN GROUP OF THE PERIODIC SYSTEM.
Claim 3
Dependent Claim
26 words
A catalyst according to claim 1 wherein the element of the second main group is selected from the group consisting of Mg, Ca, Sr and Ba.
Claim 4
Dependent Claim
23 words
A catalyst according to claim 2 wherein the atomic ratio of Al to F is between 1,000 to 10 and 1,000 to 800.
Claim 5
Dependent Claim
30 words
A catalyst according to claim 3 wherein the atomic ratio of Al to the elements of the second main group together is between 1,000 to 5 and 1,000 to 200.
Claim 6
Dependent Claim
50 words
A catalyst according to claim 4 wherein the atomic ratio of Al to F is between 1,000 to 20 and 1,000 to 400 and the atomic ratio of Al to the elements of the second main group of the periodic system is between 1,000 to 10 and 1,000 to 100.
Claim 7
Dependent Claim
50 words
A catalyst according to claim 5 whereIn the atomic ration of ratio to F is between 1,000 to 25 and 1,000 to 50 and the atomic ratio of Al to the elements of the second main group of the periodic system is between 1,000 to 50 and 1,000 to 100.
Claim 8
Dependent Claim
29 words
A catalyst according to claim 1 wherein (1) is aluminum oxide or said compound of aluminum convertible to the oxide upon heating with gaseous oxygen at 600* to 800*C.
Claim 9
Dependent Claim
28 words
A process of preparing the catalyst of claim 1 comprising preparing a mixture of (1), (2) and (3) and heating said mixture with oxygen at 600* to 800*C.
Claim 10
Dependent Claim
58 words
A process according to claim 8 where (1) is aluminum oxide or a compound which is convertible to aluminum oxide upon heating with oxygen, (2) is ammonium fluoride, ammonium hydrogen fluoride or hydrogen fluoride and (3) is the oxide of the element or a salt of the element which is convertible to the oxide upon heating with oxygen.
Claim 11
Dependent Claim
50 words
A process according to claim 9 wherein the ratio of Al to F is from 1,000 to 10 up to 1,000 to 800 and the ratio of Al to the element of the second main group of the periodic system is from 1,000 to 5 up to 1,000 to 200.
Claim 12
Dependent Claim
52 words
A process according to claim 8 wherein (1) is aluminum oxide or a compound which is convertible to aluminum oxide upon heating in oxygen and (2) and (3) together are the fluoride of an element of the second main group of the periodic system having an atomic weight of 24 to 137.
Claim 13
Dependent Claim
50 words
A process according to claim 11 wherein the ratio of Al to F is from 1,000 to 10 up to 1,000 to 400 and the ratio of Al to the element of the second main group of the periodic system is from 1,000 to 5 up to 1,000 to 200.
Claim 14
Dependent Claim
18 words
A process according to claim 8 wherein the mixture of (1), (2) and (3) is prepared in water.
Claim 15
Dependent Claim
23 words
A catalyst according to claim 1, wherein (3) is the oxide of said element of the second main group of the periodic system.
Claim 16
Dependent Claim
27 words
A catalyst according to claim 1, wherein (3) is a compound of said element of the second main group of the periodic system convertible to the oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |