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US4358397A
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Zeolite catalysts modified with group IV A metals
Assignee: Mobil Oil AS
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Filing: 1980-12-31
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Granted: 1982-11-09
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Expires: 2000-12-31
Abstract
Abstract A modified zeolite catalyst composition useful for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of Group IV A (Ti, Zr, Hf), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.
Inventors
- 👤 Chin C. Chu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:27
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/86; C07C2/862; C07C2/864; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/405; B01J29/42; B01J29/44; C07C2/54; C07C2/64; C07C2/66; C07C6/00; C07C6/08; C07C6/12; C07C6/123; C07C6/126; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; B01J29/65; B01J29/70; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
A catalyst composition comprising: a crystalline zeolite material characterized by a constraint index of within the approximate range of 1 to 12 and a silica to alumina mole ratio of at least 12; said zeolite further comprising at least 0.25 weight percent of one or more Group IVA metals incorporated into said zeolite in the form of a Group IVA metal oxide and at least 0.25 weight percent of phosphorus incorporated into said zeolite in the form of an oxide of phosphorus.
Claim 2
Dependent Claim
82 words
A catalyst composition comprising: a crystalline zeolite material characterized by a constraint index of within the approximate range of 1 to 12 and a silica to alumina mole ratio of at least 12; said zeolite further comprising at least 0.25 weight percent of one or more Group IVA metals incorporated into said zeolite in the form of a Group IVA metal oxide and at least 0.25 weight percent of phosphorus incorporated into said zeolite in the form of an oxide of phosphorus.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein said Group IVA metal is titanium.
Claim 4
Dependent Claim
18 words
The composition of claim 2 wherein said titanium comprises between 1 and 30 weight percent of said composition.
Claim 5
Dependent Claim
12 words
The composition of claim 1 wherein said Group IVA metal is zirconium.
Claim 6
Dependent Claim
18 words
The composition of claim 4 wherein said zirconium comprises between 1 and 40 weight percent of said composition.
Claim 7
Dependent Claim
12 words
The composition of claim 1 wherein said Group IVA metal is hafnium.
Claim 8
Dependent Claim
18 words
The composition of claim 6 wherein said hafnium comprises between 1 and 45 weight percent of said zeolite.
Claim 9
Dependent Claim
30 words
The composition of claim 1, 2, 3, 4, 5, 6 or 7 wherein said zeolite is chosen from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38 and ZSM-48.
Claim 10
Dependent Claim
10 words
The composition of claim 8 wherein said zeolite is ZSM-5.
Claim 11
Dependent Claim
14 words
The composition of claim 8 wherein said zeolite is admixed with a binder therefor.
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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) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |