US4435283A
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Method of dehydrocyclizing alkanes
Assignee: Chevron USA Inc
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Filing: 1982-02-01
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Granted: 1984-03-06
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Expires: 2002-02-01
Abstract
Abstract A method of dehydrocyclizing alkanes is disclosed wherein the alkanes are contacted with a catalyst containing a large-pore zeolite, a Group VIII metal, and an alkaline earth metal. The amount of Group VIII metal and the amount of alkaline earth metal present in the catalyst are adjusted so that the selectivity for n-hexane of the dehydrocyclization reaction is greater than 60%.
Inventors
- 👤 Waldeen C. Buss
- 👤 Thomas R. Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:34
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/095; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/064; B01J29/068
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
57 words
A method of reforming hydrocarbons comprising contacting said hydrocarbons with a catalyst comprising a large-pore zeolite containing: (a) at least one Group VIII metal; and (b) an alkaline earth metal selected from the group consisting of barium, strontium and calcium, wherein the process conditions are adjusted so that the selectivity for n-hexane dehydrocyclization is greater than 60%.
Claim 2
Independent Claim
57 words
A method of reforming hydrocarbons comprising contacting said hydrocarbons with a catalyst comprising a large-pore zeolite containing: (a) at least one Group VIII metal; and (b) an alkaline earth metal selected from the group consisting of barium, strontium and calcium, wherein the process conditions are adjusted so that the selectivity for n-hexane dehydrocyclization is greater than 60%.
Claim 3
Dependent Claim
24 words
A method of reforming hydrocarbons according to claim 1 wherein said alkaline earth metal is barium and wherein said Group VIII metal is platinum.
Claim 4
Dependent Claim
24 words
A method of reforming hydrocarbons according to claim 2 wherein said large-pore zeolite has an apparent pore size of from 7 to 9 Angstroms.
Claim 5
Dependent Claim
27 words
A method of reforming hydrocarbons according to claim 3 wherein said catalyst has from 0.1% to 5% by weight platinum and 0.1% to 35% by weight barium.
Claim 6
Dependent Claim
29 words
A method of reforming hydrocarbons according to claim 4 wherein said large-pore zeolite is selected from the group consisting of zeolite X, zeolite Y, type L zeolite and faujasite.
Claim 7
Dependent Claim
16 words
A method of reforming hydrocarbons according to claim 5 wherein said large-pore zeolite is zeolite Y.
Claim 8
Dependent Claim
18 words
A method of reforming hydrocarbons according to claim 5 wherein said large-pore zeolite is a type L zeolite.
Claim 9
Dependent Claim
50 words
A method of reforming hydrocarbons according to claim 7 wherein said contacting occurs at a temperature of from 400° C. to 600° C.; an LHSV of from 0.3 to 5; a pressure of from 1 atmosphere to 500 psig; and an H 2 /HC ratio of from 1:1 to 10:1.
Claim 10
Dependent Claim
41 words
A method of reforming hydrocarbons according to claim 8 wherein said contacting occurs at a temperature of from 450° C. to 550° C.; a pressure of 50 to 200 psig; and an H 2 /HC ratio of from 2:1 to 6:1.
Claim 11
Independent Claim
57 words
A method of dehydrocyclizing alkanes comprising contacting said alkanes with a catalyst comprising a large-pore zeolite containing: (a) at least one Group VIII metal; and (b) an alkaline earth metal selected from the group consisting of barium, strontium and calcium, wherein the process conditions are adjusted so that the selectivity for n-hexane dehydrocyclization is greater than 60%.
Claim 12
Independent Claim
57 words
A method of dehydrocyclizing alkanes comprising contacting said alkanes with a catalyst comprising a large-pore zeolite containing: (a) at least one Group VIII metal; and (b) an alkaline earth metal selected from the group consisting of barium, strontium and calcium, wherein the process conditions are adjusted so that the selectivity for n-hexane dehydrocyclization is greater than 60%.
Claim 13
Dependent Claim
24 words
A method of dehydrocyclizing alkanes according to claim 10 wherein said alkaline earth metal is barium and wherein said Group VIII metal is platinum.
Claim 14
Dependent Claim
24 words
A method of dehydrocyclizing alkanes according to claim 11 wherein said large-pore zeolite has an apparent pore size of from 7 to 9 Angstroms.
Claim 15
Dependent Claim
27 words
A method of dehydrocyclizing alkanes according to claim 12 wherein said catalyst has from 0.1% to 5% by weight platinum and 0.1% to 35% by weight barium.
Claim 16
Dependent Claim
29 words
A method of dehydrocyclizing alkanes according to claim 13 wherein said large-pore zeolite is selected from the group consisting of zeolite X, zeolite Y, type L zeolite and faujasite.
Claim 17
Dependent Claim
16 words
A method of dehydrocyclizing alkanes according to claim 14 wherein said large-pore zeolite is zeolite Y.
Claim 18
Dependent Claim
18 words
A method of dehydrocyclizing alkanes according to claim 14 wherein said large-pore zeolite is a type L zeolite.
Claim 19
Dependent Claim
50 words
A method of dehydrocyclizing alkanes according the claim 16 wherein said contacting occurs at a temperature of from 400° C. to 600° C.; an LHSV of from 0.3 to 5; a pressure of from 1 atmosphere to 500 psig; and a H 2 /HC ratio of from 1:1 to 10:1.
Claim 20
Dependent Claim
41 words
A method of dehydrocyclizing alkanes according to claim 17 wherein said contacting occurs at a temperature of from 450° C. to 550° C.; a pressure of 50 to 200 psig; and an H 2 /HC ratio of from 2:1 to 6:1.
Claim 21
Independent Claim
62 words
A method of dehydrocyclizing alkanes comprising contacting said alkanes with a catalyst consisting essentially of: (a) a large-pore zeolite; (b) an inorganic oxide binder; (c) a Group VIII metal; and (d) a alkaline eart metal selected from the group consisting of barium, strontium and calcium, wherein the process conditions are adjusted so that the selectivity for n-hexane dehydrocyclization is greater than 60%.
Claim 22
Independent Claim
62 words
A method of dehydrocyclizing alkanes comprising contacting said alkanes with a catalyst consisting essentially of: (a) a large-pore zeolite; (b) an inorganic oxide binder; (c) a Group VIII metal; and (d) a alkaline eart metal selected from the group consisting of barium, strontium and calcium, wherein the process conditions are adjusted so that the selectivity for n-hexane dehydrocyclization is greater than 60%.
Claim 23
Dependent Claim
24 words
A method of dehydrocyclizing alkanes according to claim 19 wherein said alkaline earth metal is barium and wherein said Group VIII metal is platinum.
Claim 24
Dependent Claim
24 words
A method of dehydrocyclizing alkanes according to claim 20 wherein said large-pore zeolite has an apparent pore size of from 7 to 9 Angstroms.
Claim 25
Dependent Claim
27 words
A method of dehydrocyclizing alkanes according to claim 21 wherein said catalyst has from 0.1% to 5% by weight platinum and 0.1% to 35% by weight barium.
Claim 26
Dependent Claim
29 words
A method of dehydrocyclizing alkanes according to claim 22 wherein said large-pore zeolite is selected from the group consisting of zeolite X, zeolite Y, type L zeolite and faujasite.
Claim 27
Dependent Claim
16 words
A method of dehydrocyclizing alkanes according to claim 23 wherein said large-pore zeolite is zeolite Y.
Claim 28
Dependent Claim
18 words
A method of dehydrocyclizing alkanes according to claim 23 wherein said large-pore zeolite is a type L zeolite.
Claim 29
Dependent Claim
48 words
A method of dehydrocyclizing alkanes according to claim 25 wherein said contacting occurs at a temperature of from 400° C. to 600° C.; an LHSV offrom 0.3 to 5; a pressure of from 1 atmosphere to 500 psig; and H 2 /HC ratio of from 1:1 to 10:1.
Claim 30
Dependent Claim
41 words
A method of dehydrocyclizing alkanes according to claim 26 wherein said contacting occurs at a temperature of from 450° C. to 550° C.; a pressure of 50 to 200 psig; and an H 2 /HC ratio of from 2:1 to 6:1.
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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |