US3972829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of depositing a catalytically active metallic component on a carrier material
Assignee: Universal Oil Products Co
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Filing: 1974-11-07
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Granted: 1976-08-03
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Expires: 1994-11-07
Abstract
Abstract A method is disclosed for effecting a uniform distribution of catalytically active metallic component over substantially all of the available surface area of a carrier material in a crystallite size of less than about 25 Angstroms. The innovative feature is in the use of a sulfur-containing organic acid as a complexing agent for the catalytically active metallic component in an impregnating solution adjusted to a pH of from about 5 to about 7.
Inventors
- 👤 Edward Michalko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:53
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58; B01J37/00; B01J37/02; B01J37/0201; B01J37/0203
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
108 words
A method of distributing a catalytically active metallic component over the available surface area of a porous carrier material in a crystallite size of less than about 25 Angstroms which comprises commingling said carrier material with a common solution of a precursor compound of said catalytically active metallic component and an organic thio acid or a mercaptocarboxylic acid in a mole ratio of from about 1:1 to about 10:1, adjusting the pH of said solution to between about 5 and about 7 by addition of a basic reagent and impregnating said porous carrier material with the solution of adjusted pH, and thereafter drying and calcining the resultant mixture.
Claim 2
Independent Claim
108 words
A method of distributing a catalytically active metallic component over the available surface area of a porous carrier material in a crystallite size of less than about 25 Angstroms which comprises commingling said carrier material with a common solution of a precursor compound of said catalytically active metallic component and an organic thio acid or a mercaptocarboxylic acid in a mole ratio of from about 1:1 to about 10:1, adjusting the pH of said solution to between about 5 and about 7 by addition of a basic reagent and impregnating said porous carrier material with the solution of adjusted pH, and thereafter drying and calcining the resultant mixture.
Claim 3
Dependent Claim
47 words
The method of claim 1 further characterized in that said acid is selected from the group consisting of thiomalic acid, thioglycolic acid, methanethiolic acid, ethanethiolic acid, propanethiolic acid, methanethionic acid, ethanethionic acid, propanethionic acid, ethanedithioic acid, propanedithioic acid, mercaptoacetic acid, 3-mercaptopropionic acid, 2-mercaptosuccinic acid, and carboxymethylmercaptosuccinic acid.
Claim 4
Dependent Claim
23 words
The method of claim 1 further characterized in that said mixture is calcined at a temperature of from about 315° to about 925°C.
Claim 5
Dependent Claim
15 words
The method of claim 1 further characterized in that said acid is a mercaptocarboxylic acid.
Claim 6
Dependent Claim
14 words
The method of claim 1 further characterized in that said acid is thiomalic acid.
Claim 7
Dependent Claim
14 words
The method of claim 1 further characterized in that said acid is thioglycolic acid.
Claim 8
Dependent Claim
14 words
The method of claim 1 further characterized in that said acid is mercaptopropionic acid.
Claim 9
Dependent Claim
14 words
The method of claim 1 further characterized in that said acid is carboxymethylmercaptosuccinic acid.
Claim 10
Dependent Claim
14 words
The method of claim 1 further characterized in that said carrier material comprises alumina.
Claim 11
Dependent Claim
14 words
The method of claim 1 further characterized in that said carrier material is gamma-alumina.
Claim 12
Dependent Claim
14 words
The method of claim 1 further characterized in that said carrier material is eta-alumina.
Claim 13
Dependent Claim
21 words
The method of claim 1 further characterized in that said precursor compound is a compound of a metal of Group VIII.
Claim 14
Dependent Claim
15 words
The method of claim 1 further characterized in that said precursor compound is chloroplatinic acid.
Claim 15
Dependent Claim
15 words
The method of claim 1 further characterized in that said precursor compound is nickel chloride.
Claim 16
Dependent Claim
15 words
The method of claim 1 further characterized in that said precursor compound is cobalt chloride.
References Cited (Backward Citations)
US3367888A
Cited
US3503715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |