US4417090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the isomerization of paraffins
Assignee: Shell USA Inc
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Filing: 1982-09-30
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Granted: 1983-11-22
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Expires: 2002-09-30
Abstract
Abstract A process for hydroisomerization of C4-C7 paraffins with a nickel and/or cobalt synthetic mica-montmorillonite catalyst which has been pretreated with hydrogen at a temperature of at least 400 DEG C.
Inventors
- 👤 Jacobus J. L. Heinerman
- 👤 Martin F. M. Post
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:46
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2708; C07C5/2767; C07C5/277; C07C5/2775
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
A process for the isomerization of paraffins, wherein one or more paraffins containing 4-7 carbon atoms is/are contacted with a catalyst in the presence of hydrogen, at a temperature between 150° and 330° C., which catalyst has been prepared by treating an at least partly crystalline metal silicate having a space lattice largely consisting of a triplex structure, containing in the central layer octahedral co-ordinated aluminum entirely or partly substituted by nickel and/or cobalt, and in the two outer layers tetrahedral co-ordinated silicon partly substituted by aluminum, with hydrogen at a temperature of at least 400° C.
Claim 2
Dependent Claim
97 words
A process for the isomerization of paraffins, wherein one or more paraffins containing 4-7 carbon atoms is/are contacted with a catalyst in the presence of hydrogen, at a temperature between 150° and 330° C., which catalyst has been prepared by treating an at least partly crystalline metal silicate having a space lattice largely consisting of a triplex structure, containing in the central layer octahedral co-ordinated aluminum entirely or partly substituted by nickel and/or cobalt, and in the two outer layers tetrahedral co-ordinated silicon partly substituted by aluminum, with hydrogen at a temperature of at least 400° C.
Claim 3
Dependent Claim
26 words
The process of claim 1, wherein the metal silicate consists at least partly of synthetic mica-montmorillonite, in which aluminum is partly substituted by nickel and/or cobalt.
Claim 4
Dependent Claim
17 words
The process of claim 1 or 2, characterized in that aluminum is partly substituted exclusively by nickel.
Claim 5
Dependent Claim
21 words
The process of claim 3, wherein the catalyst contains at least 20% by weight of nickel, based on the total catalyst.
Claim 6
Dependent Claim
21 words
The process of claim 4, wherein the catalyst contains at least 25% by weight of nickel, based on the total catalyst.
Claim 7
Dependent Claim
22 words
The process of claim 4, wherein the metal silicate has been treated with hydrogen at a temperature between 400° and 550° C.
Claim 8
Dependent Claim
22 words
The process of claim 6, wherein the metal silicate has been treated with hydrogen at a temperature between 440° and 500° C.
Claim 9
Dependent Claim
21 words
The process of claim 1, wherein the paraffins containing 4-7 atoms mainly or entirely consist of normal pentane and/or normal hexane.
Claim 10
Dependent Claim
51 words
The process of claim 1, wherein the isomerization is carried out at a temperature between 200° and 300° C., a space velocity between 0.5 and 10 kg of paraffin/kg of catalyst/h; a hydrogen/paraffin molar ratio in the range from 1:1 to 25:1, and a total pressure between 1 and 70 bar.
Claim 11
Dependent Claim
51 words
The process of claim 9, wherein the isomerization is carried out at a temperature between 220° and 280° C., a space velocity between 1 and 5 kg of paraffin/kg of catalyst/h, a hydrogen/paraffin molar ratio in the range from 1:1 to 15:1 and a total pressure between 20 and 50 bar.
References Cited (Backward Citations)
US3766292A
Cited
US4022684A
Cited
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 |