Patent US4434311A successfully refreshed from Google Patents.
US4434311A
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Conversion of alkycyclopentanes to aromatics
Assignee: Chevron USA Inc
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Filing: 1982-09-20
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Granted: 1984-02-28
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Expires: 2002-09-20
Abstract
Abstract A method is disclosed for the dehydroisomerization of alkylcyclopentanes using a catalyst comprising a large-pore zeolite, a Group VIII metal, and an alkaline earth metal.
Inventors
- 👤 Waldeen C. Buss
- 👤 Thomas R. Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:05
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/095; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/60; B01J29/605; B01J29/61; B01J29/62; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/18; C07C5/00; C07C5/32; C07C5/373; C07C5/387; C07C5/393; C07C5/41; C07C5/415; C07C5/417; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; B01J29/08; C07C2523/00; C07C2523/02; C07C2523/38; C07C2523/40; C07C2523/42; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/60; C07C2529/61; C07C2529/62; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
47 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics comprising contacting said alkylcyclopentanes under dehydroisomerization conditions with a catalyst comprising: (a) a large-pore zeolite; (b) at least one Group VIII metal; and (c) an alkaline earth metal selected from the group consisting of barium, strontium and calcium.
Claim 2
Independent Claim
47 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics comprising contacting said alkylcyclopentanes under dehydroisomerization conditions with a catalyst comprising: (a) a large-pore zeolite; (b) at least one Group VIII metal; and (c) an alkaline earth metal selected from the group consisting of barium, strontium and calcium.
Claim 3
Dependent Claim
27 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 1 wherein said alkaline earth metal is barium and said Group VIII metal is platinum.
Claim 4
Dependent Claim
28 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 2 wherein said large-pore zeolite has an apparent pore size of from 7 to 9 Angstroms.
Claim 5
Dependent Claim
32 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 3 wherein said catalyst has from 0.1% to 5% by weight platinum and from 0.1% to 35% by weight barium.
Claim 6
Dependent Claim
32 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 4 wherein said large-pore zeolite is selected from the group consisting of zeolite X, zeolite Y and type L zeolite.
Claim 7
Dependent Claim
20 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 5 wherein said large-pore zeolite is zeolite Y.
Claim 8
Dependent Claim
22 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 5 wherein said large-pore zeolite is a type L zeolite.
Claim 9
Dependent Claim
24 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 7 wherein said catalyst has from 0.1% to 20% by weight barium.
Claim 10
Dependent Claim
29 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 8 wherein the majority of the crystals of said type L zeolite are larger than 500 Angstroms.
Claim 11
Dependent Claim
29 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 9 wherein the majority of the crystals of said type L zeolite are large than 1000 Angstroms.
Claim 12
Dependent Claim
30 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 10 wherein at least 80% of the crystals of said type L zeolite are larger than 1000 Angstroms.
Claim 13
Dependent Claim
43 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 11 wherein said catalyst comprises: (a) a type L zeolite containing from 0.1% to 1.5% by weight platinum and from 1% to 20% by weight barium; and (b) an inorganic binder.
Claim 14
Dependent Claim
28 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 12 wherein said inorganic binder is selected from the group consisting of silica, alumina, and aluminosilicates.
Claim 15
Dependent Claim
52 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 8 wherein said contacting occurs at a temperature of from 800° to 1000° F.; an LHSV of from 0.1 to 20; a pressure of from 0 to 500 psig; and an H 2 /HC ratio of from 0 to 20.
Claim 16
Dependent Claim
53 words
A method of dehydroisomerization of alkylcyclopentanes to produce aromatics according to claim 14 wherein said contacting occurs at a temperature of from 820° to 950° F.; an LHSV of from 0.5 to 10; a pressure of from 1 atm., to 300 psig; and an H 2 /HC ratio of from 1 to 10.
References Cited (Backward Citations)
US3783123A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |