US4252680A
Expired / Lapsed
US
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Oxidative dehydrogenation catalyst preparation
Assignee: Phillips Petroleum Co
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Filing: 1979-12-03
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Granted: 1981-02-24
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Expires: 1999-12-03
Abstract
Abstract In the precipitation of a tin-containing component and a phosphorus-containing component from an acid solution with a base to prepare a catalyst of improved selectivity to produce diolefin from corresponding mono-olefin there is used with the base, or thereafter, a water-soluble sulfide. The water-soluble sulfide can be at least one of an alkali-and an alkaline earth metal sulfide and ammonium sulfide.
Inventors
- 👤 Darrell W. Walker
- 👤 Floyd Farha, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:04
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/1802; B01J27/1813; C; C07; C07C; C07C5/00; C07C5/42; C07C5/48; Y; Y10; Y10S; Y10S502/00; Y10S502/52
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
60 words
A process for the preparation of an oxidative dehydrogenation catalyst suited for conversion of mono-olefin to the diolefin without excessive conversion of hydrocarbon by complete oxidation, the catalyst having improved selectivity, which comprises precipitating together a tin-containing component with a phosphorus-containing component from an acid solution with a base such as ammonium hydroxide and introducing sulfide into the precipitated mass.
Claim 2
Dependent Claim
60 words
A process for the preparation of an oxidative dehydrogenation catalyst suited for conversion of mono-olefin to the diolefin without excessive conversion of hydrocarbon by complete oxidation, the catalyst having improved selectivity, which comprises precipitating together a tin-containing component with a phosphorus-containing component from an acid solution with a base such as ammonium hydroxide and introducing sulfide into the precipitated mass.
Claim 3
Dependent Claim
37 words
A process according to claim 1 wherein at least a portion of the base to be used to cause the precipitation is replaced with a water-soluble sulfide so that precipitation occurs in the presence of said sulfide.
Claim 4
Dependent Claim
26 words
A process according to claim 1 wherein after precipitation with the base there is then added to effect an anion exchange type reaction the water-soluble sulfide.
Claim 5
Dependent Claim
24 words
A process according to claim 1 wherein the sulfide is at least one of an alkali-and an alkaline earth metal sulfide and ammonium sulfide.
Claim 6
Dependent Claim
37 words
A process according to claim 1 wherein the sulfide is at least one selected from lithium sulfide, sodium sulfide, potassium sulfide, rubidium sulfide, cesium sulfide, magnesium sulfide, calcium sulfide, strontium sulfide, and barium sulfide, and ammonium sulfide.
Claim 7
Dependent Claim
25 words
A process according to claim 1 wherein from about 10 to about 60 percent of the base is replaced with an equivalent quantity of sulfide.
Claim 8
Dependent Claim
22 words
A process according to claim 1 wherein from about 33 to about 50 percent of the base is replaced by the sulfide.
References Cited (Backward Citations)
US3775508A
Cited
US4010114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |