US3965040A
Expired / Lapsed
US
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Process for preparing catalyst
Assignee: Gulf Research and Development Co
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Filing: 1974-09-25
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Granted: 1976-06-22
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Expires: 1994-09-25
Abstract
Abstract A process for preparing a catalyst which involves coating a support with a platinum or palladium salt, calcining, further coating the calcined support with a solution containing a ruthenium or rhodium salt and an oxide, salt or acid of phosphorus and then further calcining.
Inventors
- 👤 Thaddeus P. Kobylinski
- 👤 Brian W. Taylor
- 👤 Roger F. Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:59
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J; B01J23/00; B01J23/38; B01J23/40; B01J27/00; B01J27/14; B01J27/185; B01J27/1856; B01D2255/00; B01D2255/10; B01D2255/102; B01D2255/1021; B01D2255/1023; B01D2255/1025; B01D2255/1026; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
83 words
A process for preparing a catalyst which comprises coating a support with a first solution containing a first metal salt selected from the group consisting of a salt of platinum and palladium, calcining, further coating the calcined base with a second solution containing a second metal salt selected from the group consisting of a salt of ruthenium and rhodium and a phosphorus compound selected from the group consisting of a phosphorus oxide, a phosphorus salt and a phosphorus acid and then further calcining.
Claim 2
Dependent Claim
83 words
A process for preparing a catalyst which comprises coating a support with a first solution containing a first metal salt selected from the group consisting of a salt of platinum and palladium, calcining, further coating the calcined base with a second solution containing a second metal salt selected from the group consisting of a salt of ruthenium and rhodium and a phosphorus compound selected from the group consisting of a phosphorus oxide, a phosphorus salt and a phosphorus acid and then further calcining.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said first metal salt is a platinum salt.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein said first metal salt is chloroplatinic acid.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein said second metal salt is a ruthenium salt.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein said second metal salt is ruthenium chloride.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein said phosphorus compound is phosphoric acid.
Claim 8
Dependent Claim
14 words
The process of claim 1 wherein said support is composed of a refractory oxide.
Claim 9
Dependent Claim
12 words
The process of claim 1 wherein said support is composed of alumina.
Claim 10
Dependent Claim
22 words
the process of claim 1 wherein said support has a surface area of about 1 to about 500 square meters per gram.
Claim 11
Dependent Claim
22 words
The process of claim 1 wherein said support has a surface area of about 10 to about 300 square meters per gram.
Claim 12
Dependent Claim
26 words
The process of claim 1 wherein following said first coating but prior to said first calcination said coated support is contacted with H 2 S gas.
Claim 13
Dependent Claim
25 words
The process of claim 11 wherein said contact with H 2 S is effected in a temperature range of about 5° to about 80° C.
Claim 14
Dependent Claim
25 words
The process of claim 11 wherein said contact with H 2 S is effected in a temperature range of about 15° to about 40° C.
Claim 15
Dependent Claim
24 words
The process of claim 1 wherein following said second coating but prior to said second calcination said coated support is contacted with ammonia gas.
Claim 16
Dependent Claim
24 words
The process of claim 14 wherein said contact with ammonia gas is effected in a temperature range of about 5° to about 90° C.
Claim 17
Dependent Claim
24 words
The process of claim 14 wherein said contact with ammonia gas is effected in a temperature range of about 15° to about 70° C.
Claim 18
Dependent Claim
14 words
The process of claim 1 wherein said second solution also contains a refractory material.
Claim 19
Dependent Claim
12 words
The process of claim 17 wherein said refractory material is aluminum chloride.
Claim 20
Dependent Claim
39 words
The process of claim 1 wherein the support obtained contains from about 0.001 to about two weight per cent of platinum or palladium and about 0.03 to about two weight per cent of combined ruthenium or rhodium and phosphorus.
Claim 21
Dependent Claim
39 words
The process of claim 1 wherein the support obtained contains from about 0.01 to about 0.8 weight per cent of platinum or palladium and about 0.05 to about one weight per cent of combined ruthenium or rhodium and phosphorus.
Claim 22
Dependent Claim
25 words
The process of claim 19 wherein the weight ratio of ruthenium or rhodium to phosphorus is in the range of about 1:0.1 to about 1:400.
Claim 23
Dependent Claim
25 words
The process of claim 19 wherin the weight ratio of ruthenium or rhodium to phosphorus wherein in the range of about 1:1 to about 1:100.
Claim 24
Dependent Claim
30 words
The process of claim 1 wherein the weight ratio of platinum or palladium to combined ruthenium or rhodium and phosphorus is in the range of about 1:10 to about 10:1.
Claim 25
Dependent Claim
30 words
The process of claim 1 wherein the weight ratio of platinum or palladium to combined ruthenium or rhodium and phosphorus is in the range of about 1:10 to about 5:1.
References Cited (Backward Citations)
US2890167A
Cited
US3202480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |