US3963643A
Expired / Lapsed
US
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Method of catalyst manufacture
Assignee: Universal Oil Products Co
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Filing: 1975-06-30
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Granted: 1976-06-15
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Expires: 1995-06-30
Abstract
Abstract Alumina containing a platinum group metal is treated in contact with a Friedel Crafts metal halide, and in contact with a polyhalo compound, such as carbon tetrachloride, to produce an improved hydrocarbon conversion catalyst.
Inventors
- 👤 Dalia Germanas
- 👤 Ernest L. Pollitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:34
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; B01J23/00; B01J23/38; B01J23/40; C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2791
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
118 words
In a method of catalyst manufacture, the steps of compositing from about 0.1 to about 5 wt. % platinum group metal with alumina, reacting the resultant composite with a Friedel Crafts metal halide in an amount sufficient to introduce from about 2 to about 15 wt. % combined halogen into the composite, and thereafter contacting the composite at a temperature of from about 100° to about 600° C. in a non-reducing atmosphere with a polyhalo compound containing at least 2 chlorine atoms selected from the group consisting of methylene halide, haloform, methylhaloform, carbon tetrahalide, sulfur dihalide, sulfuryl halide, thionyl halide, and thiocarbonyl tetrahalide in sufficient amount to add at least 0.1 wt. % combined halogen to the composite.
Claim 2
Dependent Claim
118 words
In a method of catalyst manufacture, the steps of compositing from about 0.1 to about 5 wt. % platinum group metal with alumina, reacting the resultant composite with a Friedel Crafts metal halide in an amount sufficient to introduce from about 2 to about 15 wt. % combined halogen into the composite, and thereafter contacting the composite at a temperature of from about 100° to about 600° C. in a non-reducing atmosphere with a polyhalo compound containing at least 2 chlorine atoms selected from the group consisting of methylene halide, haloform, methylhaloform, carbon tetrahalide, sulfur dihalide, sulfuryl halide, thionyl halide, and thiocarbonyl tetrahalide in sufficient amount to add at least 0.1 wt. % combined halogen to the composite.
Claim 3
Dependent Claim
37 words
The method of claim 1 further characterized in that said metal halide is in vapor form and is sublimed onto the composite which is then heated to a temperature of from about 300° to about 600° C.
Claim 4
Dependent Claim
15 words
The method of claim 1 further characterized in that said platinum group metal is platinum.
Claim 5
Dependent Claim
13 words
The method of claim 1 further characterized in that said alumina is gamma-alumina.
Claim 6
Dependent Claim
13 words
The method of claim 1 further characterized in that said alumina is eta-alumina.
Claim 7
Dependent Claim
14 words
The method of claim 1 further characterized in that said alumina is substantially sodium-free.
Claim 8
Dependent Claim
23 words
The method of claim 1 further characterized in that said alumina is gamma-alumina containing from about 0.2 to about 2.0 wt. % platinum.
Claim 9
Dependent Claim
17 words
The method of claim 1 further characterized in that said Friedel Crafts metal halide is aluminum chloride.
Claim 10
Dependent Claim
15 words
The method of claim 1 further characterized in that said polyhalo compound is carbon tetrachloride.
Claim 11
Independent Claim
94 words
A method of catalyst manufacture consisting essentially of treating alumina containing from about 0.1 to about 2.0 wt. % platinum in a hydrogen atmosphere in contact with aluminum chloride and reacting the aluminum chloride with said alumina with the formation of a composite containing from about 2.0 to about 6.0 wt. % combined chloride, and treating said composite in a nitrogen atmosphere at a temperature of from about 150° C. to about 350° C. in contact with carbon tetrachloride and adding from about 0.1 to about 5 wt. % combined chloride to said composite.
Claim 12
Independent Claim
94 words
A method of catalyst manufacture consisting essentially of treating alumina containing from about 0.1 to about 2.0 wt. % platinum in a hydrogen atmosphere in contact with aluminum chloride and reacting the aluminum chloride with said alumina with the formation of a composite containing from about 2.0 to about 6.0 wt. % combined chloride, and treating said composite in a nitrogen atmosphere at a temperature of from about 150° C. to about 350° C. in contact with carbon tetrachloride and adding from about 0.1 to about 5 wt. % combined chloride to said composite.
Claim 13
Dependent Claim
21 words
A catalyst prepared by the method of claim 1 and consisting essentially of a platinum group metal, alumina and combined halogen.
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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |