US3935126A
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Catalyst and method of oxydehydrogenation of alkyl aromatic compounds
Assignee: Dow Chemical Co
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Filing: 1974-05-28
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Granted: 1976-01-27
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Expires: 1994-05-28
Abstract
Abstract Alkaline earth-nickel phosphates having from about 61% to about 70% phosphate are superior catalysts for oxydehydrogenating alkyl aromatic compounds including nitrogen heterocyclics which have at least one C2-C6 alkyl side chain to form derivatives having side chain unsaturation. The alkyl aromatic compound can have 1-2 rings. The process is carried out at 450 DEG -650 DEG C. and a space velocity of 55-2500.
Inventors
- 👤 G. Edwin Vrieland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:39
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; B; B01; B01J; B01J27/00; B01J27/14; B01J27/185; B01J27/1853; C07C; C07C37/00; C07C37/001; C07C5/00; C07C5/42; C07C5/48; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
18 words
A catalyst consisting essentially of an alkaline earth metal-nickel phosphate containing from about 61 to about 70% phosphate.
Claim 2
Dependent Claim
18 words
A catalyst consisting essentially of an alkaline earth metal-nickel phosphate containing from about 61 to about 70% phosphate.
Claim 3
Dependent Claim
14 words
A catalyst of claim 1 in which the alkaline earth metal moiety is calcium.
Claim 4
Dependent Claim
14 words
A catalyst of claim 1 in which the alkaline earth metal moiety is strontium.
Claim 5
Independent Claim
45 words
A method of preparing a catalyst having from about 61 to about 70% phosphate consisting essentially of impregnating an alkaline earth-nickel phosphate with an aqueous solution having a concentration from about 0.15 to about 3.5 moles of phosphate per liter and thereafter drying the catalyt.
Claim 6
Independent Claim
45 words
A method of preparing a catalyst having from about 61 to about 70% phosphate consisting essentially of impregnating an alkaline earth-nickel phosphate with an aqueous solution having a concentration from about 0.15 to about 3.5 moles of phosphate per liter and thereafter drying the catalyt.
Claim 7
Dependent Claim
15 words
The method of claim 4 is which the alkaline earth nickel phosphate is calcium-nickel phosphate.
Claim 8
Dependent Claim
16 words
The method of claim 4 in which the alkaline earth metal phosphate is strontium nickel phosphate.
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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |