US4039479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of catalyst manufacture
Assignee: Honeywell UOP LLC
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Filing: 1976-09-10
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Granted: 1977-08-02
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Expires: 1996-09-10
Abstract
Abstract A method of manufacture providing a catalytic composite of improved activity is disclosed. A zeolite of the mordenite crystal structure, with a sodium content of less than about 5 wt. % as Na 2 O, is subjected to an aqueous ammoniacal treatment at a pH of at least about 9.5, and calcined in intimate admixture with a non-zeolitic refractory inorganic oxide and a metal salt convertible to said oxide at calcination conditions.
Inventors
- 👤 Stanley A. Gembicki
- 👤 Richard W. Arbesman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:52
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
96 words
A method of preparing a catalytic composite which comprises subjecting a zeolite of the mordenite crystal structure and containing less than about 5 wt. % sodium as Na 2 O, to an aqueous ammoniacal treatment at a pH of at least about 9.5, and calcining the thus treated zeolite in intimate admixture with a refractory inorganic oxide or gel and a metal salt convertible to said oxide at calcination conditions, said salt being in sufficient concentration to provide from about 5 to about 20 wt. % of the refractory inorganic oxide content of said catalytic composite.
Claim 2
Independent Claim
96 words
A method of preparing a catalytic composite which comprises subjecting a zeolite of the mordenite crystal structure and containing less than about 5 wt. % sodium as Na 2 O, to an aqueous ammoniacal treatment at a pH of at least about 9.5, and calcining the thus treated zeolite in intimate admixture with a refractory inorganic oxide or gel and a metal salt convertible to said oxide at calcination conditions, said salt being in sufficient concentration to provide from about 5 to about 20 wt. % of the refractory inorganic oxide content of said catalytic composite.
Claim 3
Dependent Claim
13 words
The method of claim 1 further characterized in that said zeolite is mordenite.
Claim 4
Dependent Claim
13 words
The method of claim 1 further characterized in that said zeolite is clinoptilolite.
Claim 5
Dependent Claim
28 words
The method of claim 1 further characterized in that said refractory inorganic oxide is an alumina and said metal salt is an aluminum salt of a strong acid.
Claim 6
Dependent Claim
17 words
The method of claim 1 further characterized in that said refractory inorganic oxide is an alpha-alumina monohydrate.
Claim 7
Dependent Claim
49 words
The method of claim 1 further characterized in that said zeolite is calcined in intimate admixture with said refractory inorganic oxide and said metal salt to provide a catalytic composite comprising said zeolite and a refractory inorganic oxide in a weight ratio of from about 1:3 to about 3:1.
Claim 8
Dependent Claim
23 words
The method of claim 1 further characterized in that said refractory inorganic oxide is an alumina and said metal salt is aluminum nitrate.
Claim 9
Dependent Claim
36 words
The method of claim 1 further characterized in that said zeolite is calcined in intimate admixture with said refractory inorganic oxide and said metal salt at a temperature of from about 425° to about 750° C.
Claim 10
Dependent Claim
36 words
The method of claim 1 further characterized in that said zeolite is calcined in intimate admixture with said refractory inorganic oxide and said metal salt at a temperature of from about 425° to about 550° C.
Claim 11
Dependent Claim
25 words
The method of claim 1 further characterized in that said aqueous ammonia treatment is effected at a pH of from about 10 to about 12.
Claim 12
Dependent Claim
26 words
The method of claim 1 further characterized in that said aqueous ammoniacal treatment is effected at a temperature of from about 75° to about 200° C.
Claim 13
Dependent Claim
30 words
The method of claim 1 further characterized in that said zeolite is subjected to said aqueous ammoniacal treatment in intimate admixture with said refractory inorganic oxide and said metal salt.
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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |