Patent US4416766A successfully refreshed from Google Patents.
US4416766A
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Hydrocarbon conversion with crystalline silicates
Assignee: Chevron USA Inc
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Filing: 1981-10-22
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Granted: 1983-11-22
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Expires: 2001-10-22
Abstract
Abstract A process for selectively converting adsorbable hydrocarbon feeds containing straight-chain and slightly branched-chain hydrocarbons to olefins by contacting the feeds with crystalline silicates.
Inventors
- 👤 Bernard F. Mulaskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:32
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/095; B; B01; B01J; B01J29/00; B01J29/03; B01J29/035; B01J29/04; B01J29/06; B01J29/40; C10G29/00; C10G29/16; C10G35/065; B01J2229/00; B01J2229/30; B01J2229/42; C10G2300/00; C10G2300/70; C10G2400/00; C10G2400/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
69 words
A process for producing olefins from normal paraffins, slightly branched paraffins, and mixtures thereof, comprising contacting a feed which comprises said paraffins with a crystalline silicate having a uniform pore structure, having a pore size such that p-xylene can be adsorbed into said pore structure and o-xylene cannot, and having a silica/alumina mole ratio greater than about 200:1; and, producing an effluent of greater olefin content than said feed.
Claim 2
Dependent Claim
69 words
A process for producing olefins from normal paraffins, slightly branched paraffins, and mixtures thereof, comprising contacting a feed which comprises said paraffins with a crystalline silicate having a uniform pore structure, having a pore size such that p-xylene can be adsorbed into said pore structure and o-xylene cannot, and having a silica/alumina mole ratio greater than about 200:1; and, producing an effluent of greater olefin content than said feed.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said silica/alumina ratio is greater than about 500:1.
Claim 4
Dependent Claim
14 words
The process of claim 2 wherein said silica/alumina ratio is greater than about 1000:1.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein said crystalline silicate is silicalite.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein said crystalline silicate is composited in a matrix and the resulting composite contains from 1 to 95 weight percent silicate.
Claim 7
Dependent Claim
23 words
The process of claim 5 wherein said matrix is substantially free of hydrocracking activity and said composite is substantially free of hydrogenation activity.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein said feed boils above 200° C.
Claim 9
Dependent Claim
25 words
The process of claim 1 wherein said feed is selected from naphtha and reformate and the effluent has a higher octane rating than said feed.
Claim 10
Dependent Claim
41 words
The process of claim 1 wherein said process is carried out at conditions including a temperature from 285° C. to 595° C., a pressure from subatmospheric to 205 bar, and an overall liquid hourly space velocity from 0.1 to 50 v/v/hr.
Claim 11
Dependent Claim
17 words
The process of claim 9 wherein said conditions include a hydrogen partial pressure up to 100 bar.
Claim 12
Dependent Claim
18 words
The process of claim 1 wherein said olefin content is at least 10 weight percent of converted feed.
Claim 13
Dependent Claim
19 words
The process of claim 1 wherein said feed contains at least 5 weight percent normal and slightly branched hydrocarbons.
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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) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |