Patent US4218346A successfully refreshed from Google Patents.
US4218346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc titanate catalyst for dehydrogenation of hydrocarbons
Assignee: Phillips Petroleum Co
•
Filing: 1979-01-08
•
Granted: 1980-08-19
•
Expires: 1999-01-08
Abstract
Abstract A process is used to dehydrogenate organic compounds to a higher degree of unsaturation by contacting in a first step, the organic compound with a calcined zinc titanate catalyst. In the second step, the catalyst is contacted with oxygen essentially in the absence of the dehydrogenatable organic compound. The first and second steps are repeated sequentially.
Inventors
- 👤 Darrell W. Walker
- 👤 Floyd E. Farha, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:31
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/06; C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/322; C07C5/327; C07C5/333; C07C5/3332
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
94 words
A catalyst composition consisting essentially of zinc, titanium and sufficient oxygen to satisfy the valence requirements of said zinc and said titanium prepared by calcining a mixture of zinc oxide and titanium dioxide in the presence of oxygen at a temperature in the range of about 650° C. to about 1050° C. to form zinc titanate, wherein the atomic ratio of zinc to titanium in said zinc titanate is in the range of about 1.74:1 to about 2.15:1, and wherein said titanium dioxide has an average particle size of less than about 100 millimicrons.
Claim 2
Dependent Claim
94 words
A catalyst composition consisting essentially of zinc, titanium and sufficient oxygen to satisfy the valence requirements of said zinc and said titanium prepared by calcining a mixture of zinc oxide and titanium dioxide in the presence of oxygen at a temperature in the range of about 650° C. to about 1050° C. to form zinc titanate, wherein the atomic ratio of zinc to titanium in said zinc titanate is in the range of about 1.74:1 to about 2.15:1, and wherein said titanium dioxide has an average particle size of less than about 100 millimicrons.
Claim 3
Dependent Claim
24 words
A catalyst composition in accordance with claim 1 wherein the calcining temperature is in the range of about 675° C. to about 975° C.
Claim 4
Dependent Claim
21 words
A catalyst composition in accordance with claim 2 wherein said titanium dioxide has an average particle size of about 30 millimicrons.
Claim 5
Dependent Claim
90 words
A catalyst composition consisting essentially of zinc, titanium and sufficient oxygen to satisfy the valence requirements of said zinc and said titanium prepared by adding ammonium hydroxide to an aqueous solution of a zinc compound and a titanium compound to form a coprecipitate, drying and calcining said coprecipitate in air at a temperature within the range of about 650° C. to about 1050° C. to form zinc titanate wherein the atomic ratio of zinc to titanium in said zinc titanate is in the range of about 1.74:1 to about 2.15:1.
Claim 6
Dependent Claim
90 words
A catalyst composition consisting essentially of zinc, titanium and sufficient oxygen to satisfy the valence requirements of said zinc and said titanium prepared by adding ammonium hydroxide to an aqueous solution of a zinc compound and a titanium compound to form a coprecipitate, drying and calcining said coprecipitate in air at a temperature within the range of about 650° C. to about 1050° C. to form zinc titanate wherein the atomic ratio of zinc to titanium in said zinc titanate is in the range of about 1.74:1 to about 2.15:1.
Claim 7
Dependent Claim
29 words
A catalyst composition in accordance with claim 4 wherein said coprecipitate is calcined in air at a temperature in the range of about 675° C. to about 975° C.
Claim 8
Dependent Claim
22 words
A catalyst composition in accordance with claim 5 wherein said zinc compound is zinc oxide and said titanium compound is titanium dioxide.
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) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |