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US4459205A
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Catalyst for the oxidation of mercaptans to disulfides, process for the preparation thereof, and its use in the sweetening of petroleum distillates
Assignee: Compagnie Francaise de Raffinage SA
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Filing: 1983-10-21
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Granted: 1984-07-10
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Expires: 2003-10-21
Abstract
Abstract A catalyst suited for use in the sweetening of petroleum distillates (by oxidizing mercaptans to disulfides) which is formed of a metal complex of a polyaminoalkylpolycarboxylic acid deposited directly on a basic anion exchange resin. The method of making the source by exchanging a metal cation on an acidic resin; forming a complex by the action of a polyaminoalkylpolycarboxylic acid upon said resin; and exchanging the complex so formed on a basic anion exchange resin.
Inventors
- 👤 Claude Marty
- 👤 Philippe Engelhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:11
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/165; B01J31/1658; B01J31/02; B01J31/06; B01J31/08; B01J31/18; B01J31/1805; C; C10; C10G; C10G27/00; C10G27/04; C10G27/10; B01J2231/00; B01J2231/70; B01J2531/00; B01J2531/10; B01J2531/16; B01J2531/20; B01J2531/26; B01J2531/40; B01J2531/46; B01J2531/50; B01J2531/56; B01J2531/60; B01J2531/62; B01J2531/64; B01J2531/80; B01J2531/84; B01J2531/842; B01J2531/845; B01J2531/847
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
39 words
In the method of sweetening of petroleum distillates, the improvement comprising use of a catalyst for the oxidation of mercaptans to disulfides, which catalyst comprises a metal complex of polyaminoalkylpolycarboxylic acid deposited directly on a basic anion exchange resin.
Claim 2
Dependent Claim
39 words
In the method of sweetening of petroleum distillates, the improvement comprising use of a catalyst for the oxidation of mercaptans to disulfides, which catalyst comprises a metal complex of polyaminoalkylpolycarboxylic acid deposited directly on a basic anion exchange resin.
Claim 3
Dependent Claim
18 words
A method according to claim 1, wherein the polyaminoalkylpolycarboxylic acid is ethylenediaminetetraacetic acid or one of its salts.
Claim 4
Dependent Claim
33 words
A method according to claim 1, wherein the metal used to form the complex is a metal selected from the group consisting of cobalt, nickel, iron, zinc, copper, vanadium, titanium, chromium and molybdenum.
Claim 5
Dependent Claim
28 words
A method according to claim 1, wherein the metal used to form the complex is a metal selected from the group consisting of cobalt, copper, nickel and iron.
Claim 6
Dependent Claim
19 words
A method according to claim 1, wherein the basic anion exchange resin contains at least one amine functional group.
Claim 7
Dependent Claim
20 words
A method according to claim 1, wherein the basic anion exchange resin contains at least one quaternary ammonium functional group.
Claim 8
Dependent Claim
28 words
A method according to claim 2, wherein the metal used to form the complex is a metal selected from the group consisting of cobalt, copper, nickel and iron.
Claim 9
Dependent Claim
19 words
A method according to claim 2, wherein the basic anion exchange resin contains at least one amine functional group.
Claim 10
Dependent Claim
19 words
A method according to claim 7, wherein the basic anion exchange resin contains at least one amine functional group.
Claim 11
Dependent Claim
20 words
A method according to claim 2, wherein the basic anion exchange resin contains at least one quaternary ammonium functional group.
Claim 12
Dependent Claim
20 words
A method according to claim 7, wherein the basic anion exchange resin contains at least one quaternary ammonium functional group.
Claim 13
Independent Claim
72 words
The method of sweetening petroleum distillates by oxidizing mercaptans contained therein to disulfides, comprising contacting said distillates with a fixed bed of a catalyst formed by a metal complex of a polyaminoalkylpolycarboxylic acid deposited directly on a basic anion exchange resin, said contacting being done in the presence of a strong base and oxygen at a temperature ranging from 0° to 125° C. and a pressure ranging from 1 to 50 bars.
Claim 14
Independent Claim
72 words
The method of sweetening petroleum distillates by oxidizing mercaptans contained therein to disulfides, comprising contacting said distillates with a fixed bed of a catalyst formed by a metal complex of a polyaminoalkylpolycarboxylic acid deposited directly on a basic anion exchange resin, said contacting being done in the presence of a strong base and oxygen at a temperature ranging from 0° to 125° C. and a pressure ranging from 1 to 50 bars.
Claim 15
Dependent Claim
51 words
The method of claim 12, wherein the polyaminoalkylpolycarboxylic acid is ethylenediaminetetraacetic acid or one of its salts, the metal used to form the complex is a metal selected from the group consisting of cobalt, copper, nickel and iron, and the basic anion exchange resin contains at least one amine functional group.
Claim 16
Dependent Claim
52 words
The method of claim 12, wherein the polyaminoalkylpolycarboxylic acid is ethylenediaminetetraacetic acid or one of its salts, the metal used to form the complex is a metal selected from the group consisting of cobalt, copper, nickel and iron, and the basic anion exchange resin contains at least one quaternary ammonium functional group.
Claim 17
Dependent Claim
38 words
The method according to claim 12, wherein the base is injected in liquid form into the distillates to be treated in an amount from about a stoichiometric ratio to the mercaptans to a ratio slightly in excess thereof.
Claim 18
Dependent Claim
51 words
The method of claim 15, wherein the polyaminoalkylpolycarboxylic acid is ethylenediaminetetraacetic acid or one of its salts, the metal used to form the complex is a metal selected from the group consisting of cobalt, copper, nickel and iron, and the basic anion exchange resin contains at least one amine functional group.
Claim 19
Independent Claim
98 words
The method of sweetening petroleum distillates by oxidizing mercaptans contained therein to disulfides, comprising contacting said distillates with a fixed bed of a catalyst formed by a metal complex of a polyaminoalkylpolycarboxylic acid deposited directly on a basic anion exchange resin, said complex being mixed directly with solid potash in a proportion ranging from 5 to 25 weight percent of the total weight of the fixed bed including catalyst and potash, said contacting being done in the presence of oxygen at a temperature ranging from 0° to 125° C. and a pressure ranging from 1 to 50 bars.
Claim 20
Independent Claim
98 words
The method of sweetening petroleum distillates by oxidizing mercaptans contained therein to disulfides, comprising contacting said distillates with a fixed bed of a catalyst formed by a metal complex of a polyaminoalkylpolycarboxylic acid deposited directly on a basic anion exchange resin, said complex being mixed directly with solid potash in a proportion ranging from 5 to 25 weight percent of the total weight of the fixed bed including catalyst and potash, said contacting being done in the presence of oxygen at a temperature ranging from 0° to 125° C. and a pressure ranging from 1 to 50 bars.
Claim 21
Dependent Claim
51 words
The method of claim 17, wherein the polyaminoalkylpolycarboxylic acid is ethylenediaminetetraacetic acid or one of its salts, the metal used to form the complex is a metal selected from the group consisting of cobalt, copper, nickel and iron, and the basic anion exchange resin contains at least one amine functional group.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |