US4122039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing catalyst
Assignee: Gulf Research and Development Co
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Filing: 1977-05-12
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Granted: 1978-10-24
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Expires: 1997-05-12
Abstract
Abstract A process for preparing a catalyst which involves coating a support with a first solution containing a platinum or palladium salt and a rhodium salt, calcining, further coating the calcined support with a second solution containing a salt of ruthenium and an oxide, salt or acid of phosphorus and then further calcining.
Inventors
- 👤 Thaddeus P. Kobylinski
- 👤 Brian Taylor
- 👤 Roger F. Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:52
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/46; B01J23/464; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/1802; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
137 words
A process for preparing a catalyst consisting essentially in coating a support having a surface area of about 1 to about 500 square meters per gram with a first solution consisting essentially of a first metal salt selected from the group consisting of a salt of platinum and palladium and a salt of rhodium, calcining, further coating the calcined base with a second solution consisting essentially of a salt of ruthenium and a phosphorus compound selected from the group consisting of a phosphorus oxide, a phosphorus salt and a phosphorus acid and then further calcining to produce a support containing from about 0.001 to about 2 weight per cent of platinum or palladium, about 0.005 to about 1 weight per cent of rhodium and about 0.03 to about 2 weight per cent of combined ruthenium and phosphorus.
Claim 2
Dependent Claim
137 words
A process for preparing a catalyst consisting essentially in coating a support having a surface area of about 1 to about 500 square meters per gram with a first solution consisting essentially of a first metal salt selected from the group consisting of a salt of platinum and palladium and a salt of rhodium, calcining, further coating the calcined base with a second solution consisting essentially of a salt of ruthenium and a phosphorus compound selected from the group consisting of a phosphorus oxide, a phosphorus salt and a phosphorus acid and then further calcining to produce a support containing from about 0.001 to about 2 weight per cent of platinum or palladium, about 0.005 to about 1 weight per cent of rhodium and about 0.03 to about 2 weight per cent of combined ruthenium and phosphorus.
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 first metal salt is a palladium salt.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein said rhodium salt is rhodium chloride.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein said ruthenium salt is ruthenium chloride.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein said phosphorus compound is phosphoric acid.
Claim 9
Dependent Claim
14 words
The process of claim 1 wherein said support is composed of a refractory oxide.
Claim 10
Dependent Claim
12 words
The process of claim 1 wherein said support is composed of alumina.
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 10 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 10 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
44 words
The process of claim 1 wherein the support contains from about 0.01 to about 0.8 weight per cent of platinum or palladium, about 0.01 to about 0.5 weight per cent rhodium and about 0.05 to about one per cent of combined ruthenium and phosphorus.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |