US4567312A
Expired / Lapsed
US
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Process for producing alkylbenzenes
Assignee: Chevron USA Inc
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Filing: 1984-01-25
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Granted: 1986-01-28
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Expires: 2004-01-25
Abstract
Abstract Paraffins having a carbon number in excess of 10 are converted to aromatics, such as n-alkylbenzenes, over a dehydrocyclization catalyst comprising a large-pore zeolite containing at least one Group VIII metal. This process is carried out at a pressure of less than 100 psig. The dehydrocyclization catalyst can contain an alkaline earth metal selected from the group consisting of barium, strontium, and calcium. Preferably, the dehydrocyclization catalyst has from 8 to 10 percent by weight barium and from 0.2 to 1.0 percent by weight platinum, and the large-pore zeolite is a type L zeolite.
Inventors
- 👤 Stephen J. Miller
- 👤 Sue D. Pandey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:35
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/064; B01J29/068; C; C07; C07C; C07C5/00; C07C5/32; C07C5/373; C07C5/393; C07C5/41; C07C5/415; C07C5/417
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
40 words
A process for producing n-alkylbenzenes comprising contacting n-paraffins having a carbon number in excess of 15, with a dehydrocyclization catalyst, comprising a large-pore zeolite containing at least one Group VIII metal, under conditions which favor dehydrocyclization to produce said n-alkylbenzenes.
Claim 2
Dependent Claim
40 words
A process for producing n-alkylbenzenes comprising contacting n-paraffins having a carbon number in excess of 15, with a dehydrocyclization catalyst, comprising a large-pore zeolite containing at least one Group VIII metal, under conditions which favor dehydrocyclization to produce said n-alkylbenzenes.
Claim 3
Dependent Claim
32 words
A process according to claim 1 wherein said process is carried out at a pressure of less than 100 psig and a temperature of from about 370° C. to about 540° C.
Claim 4
Dependent Claim
18 words
A process according to claim 1 wherein said paraffins have from 16 to 22 carbon atoms per molecule.
Claim 5
Dependent Claim
18 words
A process according to claim 1 wherein said paraffins have from 25 to 40 carbon atoms per molecule.
Claim 6
Dependent Claim
21 words
A process according to claim 1 wherein said large-pore zeolite has an apparent pore size of from 7 to 9 Angstroms.
Claim 7
Dependent Claim
25 words
A process according to claim 5 wherein said large-pore zeolite is selected from the group consisting of zeolite X, zeolite Y and type L zeolite.
Claim 8
Dependent Claim
15 words
A process according to claim 6 wherein said large-pore zeolite is a type L zeolite.
Claim 9
Dependent Claim
25 words
A process according to claim 1 wherein said dehydrocyclization catalyst contains an alkaline earth metal selected from the group consisting of barium, strontium, and calcium.
Claim 10
Dependent Claim
21 words
A process according to claim 8 wherein said alkaline earth metal is barium and wherein said Group VIII metal is platinum.
Claim 11
Dependent Claim
28 words
A process according to claim 9 wherein said dehydrocyclization catalyst has from 8 to 10 percent by weight barium and from 0.2 to 1.0 percent by weight platinum.
Claim 12
Dependent Claim
93 words
A process for producing n-alkylbenzenes comprising: contacting n-paraffins, having a carbon number in excess of 15, at a pressure of less than 100 psig and a temperature of from about 370° C. to about 540° C. with a dehydrocyclization catalyst under conditions which favor dehydrocyclization to produce n-alkylbenzenes, wherein said dehydrocyclization catalyst comprises: (1) a type L zeolite containing from 8 to 10 percent by weight barium and from 0.2 to 1.0 percent by weight platinum; and (2) a nonacidic inorganic oxide binder selected from the group consisting of silica, alumina, and aluminosilicates.
Claim 13
Dependent Claim
93 words
A process for producing n-alkylbenzenes comprising: contacting n-paraffins, having a carbon number in excess of 15, at a pressure of less than 100 psig and a temperature of from about 370° C. to about 540° C. with a dehydrocyclization catalyst under conditions which favor dehydrocyclization to produce n-alkylbenzenes, wherein said dehydrocyclization catalyst comprises: (1) a type L zeolite containing from 8 to 10 percent by weight barium and from 0.2 to 1.0 percent by weight platinum; and (2) a nonacidic inorganic oxide binder selected from the group consisting of silica, alumina, and aluminosilicates.
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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |