US4347394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzene synthesis
Assignee: Chevron USA Inc
•
Filing: 1980-12-10
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Granted: 1982-08-31
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Expires: 2000-12-10
Abstract
Abstract A process for selectively producing benzene using intermediate pore size zeolites substantially free of acidity is disclosed.
Inventors
- 👤 Clifford M. Detz
- 👤 Leslie A. Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:37
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/373; C07C5/393; C07C5/41; C10; C10G; C10G2400/00; C10G2400/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
77 words
A process for selectively preparing a product having a substantial benzene content from normal and slightly branched hydrocarbons, comprising (a) contacting a hydrocarbonaceous feed, which comprises normal and slightly branched hydrocarbons and has a boiling range above about 40° C. and less than about 200° C. with a conversion catalyst which comprises an intermediate pore size zeolite and a platinum compound, and wherein said zeolite is substantially free of acidity; and (b) recovering a benzene containing effluent.
Claim 2
Dependent Claim
77 words
A process for selectively preparing a product having a substantial benzene content from normal and slightly branched hydrocarbons, comprising (a) contacting a hydrocarbonaceous feed, which comprises normal and slightly branched hydrocarbons and has a boiling range above about 40° C. and less than about 200° C. with a conversion catalyst which comprises an intermediate pore size zeolite and a platinum compound, and wherein said zeolite is substantially free of acidity; and (b) recovering a benzene containing effluent.
Claim 3
Dependent Claim
25 words
A process according to claim 1 wherein intermediate pore size zeolite has pore apertures in the range of about 5 Angstroms to about 6.5 Angstroms.
Claim 4
Dependent Claim
16 words
A process according to claim 1 wherein said zeolite is selected from ZSM-5, ZSM-11, and silicalite.
Claim 5
Dependent Claim
24 words
A process according to claim 1 wherein said zeolite contains a sufficient quantity of an alkali metal compound to be substantially free of acidity.
Claim 6
Dependent Claim
30 words
A process according to claim 4 wherein said zeolite has an alkali metal content of about 100%, or greater, of the acid sites in said zeolite on a molar basis.
Claim 7
Dependent Claim
16 words
A process according to claim 5 wherein said alkali metal is selected from potassium and sodium.
Claim 8
Dependent Claim
13 words
A process according to claim 1 wherein said zeolite consists essentially of silica.
Claim 9
Dependent Claim
22 words
A process according to claim 1 wherein said feed has a boiling range above about 60° C. and below about 120° C.
Claim 10
Dependent Claim
20 words
A process according to claim 8 wherein said feed consists essentially of hydrocarbons having from 6 to 8 carbon atoms.
Claim 11
Dependent Claim
17 words
A process according to claim 1 wherein said contacting occurs at a temperature above about 480° C.
Claim 12
Dependent Claim
17 words
A process according to claim 10 wherein said contacting occurs at a temperature above about 510° C.
Claim 13
Dependent Claim
15 words
A process according to claim 10 wherein said conversion catalyst further comprises a halide component.
Claim 14
Dependent Claim
56 words
A reformer effluent upgrading process, comprising: (a) reforming a reformer feed to produce a reformer effluent; and (b) producing an upgraded reformate having an increased benzene concentration by contacting said reformer effluent with a conversion catalyst which comprises an intermediate pore size zeolite and a platinum compound, and wherein said zeolite is substantially free of acidity.
Claim 15
Dependent Claim
56 words
A reformer effluent upgrading process, comprising: (a) reforming a reformer feed to produce a reformer effluent; and (b) producing an upgraded reformate having an increased benzene concentration by contacting said reformer effluent with a conversion catalyst which comprises an intermediate pore size zeolite and a platinum compound, and wherein said zeolite is substantially free of acidity.
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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) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |