US4400571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon isomerization process
Assignee: Honeywell UOP LLC
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Filing: 1982-09-10
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Granted: 1983-08-23
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Expires: 2002-09-10
Abstract
Abstract Hydrocarbons are converted by contacting them at hydrocarbon conversion conditions with a catalyst composite comprising from about 5 weight percent to about 95 weight percent of a silica polymorph consisting of crystalline silica, said silica polymorph after calcination in air at 600 DEG C. for one hour, having a mean refractive index of 1.39+/-0.01 and a specific gravity at 25 DEG C. of 1.70+/-0.05 g/cc and at least 5 weight percent to about 95 weight percent Ziegler alumina.
Inventors
- 👤 Delmar W. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:28
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; B; B01; B01J; B01J29/00; B01J29/03; B01J29/035; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/18; C07C5/00; C07C5/22; C07C5/2206; C07C5/27; C07C5/2729; C07C5/2732; C07C6/00; C07C6/08; C07C6/12; C07C6/123; C07C2521/00; C07C2521/02; C07C2521/04; C07C2529/00; C07C2529/03; C07C2529/035; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A process for the catalytic isomerization of a hydrocarbon which comprises contacting the hydrocarbon at hydrocarbon isomerization conditions with a catalytic composite comprising from about 5 weight percent to about 95 weight percent of a silica polymorph consisting of crystalline silica, said silica polymorph after calcination in air at 600° C. for one hour, having a mean refractive index of 1.39±0.01 and a specific gravity at 25° C. of 1.70±0.05 g/cc and at least 5 weight percent to about 95 weight percent Ziegler alumina.
Claim 2
Dependent Claim
84 words
A process for the catalytic isomerization of a hydrocarbon which comprises contacting the hydrocarbon at hydrocarbon isomerization conditions with a catalytic composite comprising from about 5 weight percent to about 95 weight percent of a silica polymorph consisting of crystalline silica, said silica polymorph after calcination in air at 600° C. for one hour, having a mean refractive index of 1.39±0.01 and a specific gravity at 25° C. of 1.70±0.05 g/cc and at least 5 weight percent to about 95 weight percent Ziegler alumina.
Claim 3
Dependent Claim
54 words
The process of claim 1 wherein said isomerization conditions include a temperature of about 75° F. to about 900° F., a pressure from about atmospheric to about 100 atmospheres, a hydrogen to hydrocarbon mole ratio of about 0.5:1 to about 20:1 and a liquid hourly space velocity (LHSV) of about 0.2 to about 10.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein said hydrocarbon isomerization is conducted with a feedstock comprising paraffin hydrocarbons.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein said hydrocarbon isomerization is conducted with a feedstock comprising alkylaromatic hydrocarbons.
Claim 6
Dependent Claim
17 words
The process of claim 1 wherein said hydrocarbon isomerization is conducted with a feedstock comprising olefin 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) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |