US3832414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrocyclization of hydrocarbons
Assignee: Sun Research and Development Co
•
Filing: 1972-12-11
•
Granted: 1974-08-27
•
Expires: 1992-12-11
Abstract
Abstract Process of dehydrocyclizing C6-C10 hydrocarbons having at least a C6 backbone using a Li, Na or K zeolite X or Y impregnated or ion exchanged with 0.1 to 1.2 weight percent Pt and impregnated or ion exchanged with 0.01 to 1.0 weight percent Cd at from 500 to 560 and preferably 510* to 555*C. using a partial pressure of hydrogen of from 10 to 300 p.s.i. and preferably 40 to 200 p.s.i. to form benzene and alkylbenzene.
Inventors
- 👤 M Oishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:40
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/10; B01J29/12; C; C07; C07C; C07C5/00; C07C5/32; C07C5/373; C07C5/393; C07C5/41; C07C5/415; C07C5/417
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
The process of claim 1 wherein the platinum has been ion exchanged onto the zeolite and then reduced to the free metal state.
Claim 2
Dependent Claim
11 words
The process of claim 2 wherein the zeolite is zeolite X.
Claim 3
Dependent Claim
18 words
The process of claim 3 wherein the hydrogen partial pressure is from about 50 p.s.i.g. to 200 p.s.i.g.
Claim 4
Dependent Claim
13 words
The process of claim 4 wherein the temperature is from 510*C. to 555*C.
Claim 5
Dependent Claim
17 words
The process of claim 5 wherein the feed liquid hourly space velocity is from 2 to 15.
Claim 6
Dependent Claim
27 words
The process of claim 6 wherein the paraffin starting material is a hydrocarbon feed stream consisting essentially of normal paraffins containing from six to 10 carbon atoms.
References Cited (Backward Citations)
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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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |