US4059676A
Expired / Lapsed
US
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Decomposition of halogenated organic compounds
Assignee: Vista Chemical Co
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Filing: 1976-06-14
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Granted: 1977-11-22
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Expires: 1996-06-14
Abstract
Abstract A method for decomposing halogenated organic compounds which comprises: (a) heating the halogenated organic compound to a temperature above about 300° C. and (b) contacting the heated organic compound with a catalytic amount of ruthenium-platinum catalyst in the presence of an oxidizing agent at a temperature of at least about 350° C.
Inventors
- 👤 Kang Yang
- 👤 James D. Reedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:28
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8659; B01D53/8662; C; C01; C01B; C01B7/00; C01B7/01
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
107 words
A method for decomposing chlorinated organic compounds, said chlorinated orgainc compounds containing 1 to 4 carbon atoms and containing at least as many hydrogen atoms as chlorine atoms, said method comprising: a. heating the chlorinated organic compounds to a temperature above about 300° C., and b. then contacting the heated organic compound with a catalytic amount of ruthenium-platinum catalyst in the presence of an oxidizing agent, selected from the group consisting of air, oxygen, and mixtures of nitrogen and oxygen, at a temperature of at least about 350° C., said catalysts being present in the range of 1 to 20 parts of platinum per part of ruthenium.
Claim 2
Independent Claim
107 words
A method for decomposing chlorinated organic compounds, said chlorinated orgainc compounds containing 1 to 4 carbon atoms and containing at least as many hydrogen atoms as chlorine atoms, said method comprising: a. heating the chlorinated organic compounds to a temperature above about 300° C., and b. then contacting the heated organic compound with a catalytic amount of ruthenium-platinum catalyst in the presence of an oxidizing agent, selected from the group consisting of air, oxygen, and mixtures of nitrogen and oxygen, at a temperature of at least about 350° C., said catalysts being present in the range of 1 to 20 parts of platinum per part of ruthenium.
Claim 3
Dependent Claim
55 words
The process of claim 1 wherein the chlorinated organic compounds are selected from the group consisting of vinyl chloride and mixtures of C 1 chlorinated compounds and C 2 chlorinated compounds containing vinyl chloride wherein the total number of hydrogen atoms in the mixture is at least equal to the total number of chlorine atoms.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein the chlorinated organic compound is vinyl chloride.
Claim 5
Dependent Claim
23 words
The process of claim 3 wherein the ruthenium-platinum catalyst comprises ruthenium supported on a non-oxidizing carrier and platinum supported on a non-oxidizing carrier.
Claim 6
Dependent Claim
32 words
The process of claim 4 wherein the temperature in step (a) is above 320° C. and the temperature in step (b) is in the range of about 350° to about 600° C.
Claim 7
Dependent Claim
32 words
The process of claim 5 wherein the temperature of step (a) is above 340° C. and the temperature of step (b) is in the range of about 400° to about 500° C.
Claim 8
Dependent Claim
23 words
The process of claim 3 wherein the ruthenium-platinum catalyst comprises ruthenium impregnated on alumina or Kieselguhr and platinum impregnated on alumina or kieselguhr.
Claim 9
Dependent Claim
25 words
The process of claim 3 wherein the ruthenium-platinum catalyst comprises a bimetallic catalyst wherein both ruthenium and platinum are supported on a single non-oxidizing carrier.
Claim 10
Dependent Claim
19 words
The process of claim 3 wherein the ruthenium-platinum catalyst comprises finely divided metallic ruthenium and finely divided metallic platinum.
Claim 11
Dependent Claim
23 words
The process of claim 4 wherein the heated organic compound is contacted first with the ruthenium catalyst and then with the platinum catalyst.
Claim 12
Dependent Claim
23 words
The process of claim 4 wherein the heated organic compound is contacted first with the platinum catalyst and then with the ruthenium catalyst.
Claim 13
Independent Claim
139 words
A method for substantially reducing the amount of chlorinated organic compounds in a gaseous stream containing chlorinated organic compounds by decomposing said chlorinated organic compounds, said chlorinated organic compounds containing 1 to 4 carbon atoms and containing at least as many hydrogen atoms as chlorine atoms, said method comprising: a. heating a gaseous stream comprising said chlorinated organic compounds and an oxidizing gas selected from air and a mixture of nitrogen and oxygen to a temperature above about 300° C., and b. then passing the heated gaseous stream of step (a) through a heated zone having a temperature of at least about 350° C. wherein it contacts a catalytic amount of a ruthenium-platinum catalyst said catalysts being present, based on the noble metal content thereof, in the range of 1 to 20 parts of platinum per part of ruthenium.
Claim 14
Independent Claim
139 words
A method for substantially reducing the amount of chlorinated organic compounds in a gaseous stream containing chlorinated organic compounds by decomposing said chlorinated organic compounds, said chlorinated organic compounds containing 1 to 4 carbon atoms and containing at least as many hydrogen atoms as chlorine atoms, said method comprising: a. heating a gaseous stream comprising said chlorinated organic compounds and an oxidizing gas selected from air and a mixture of nitrogen and oxygen to a temperature above about 300° C., and b. then passing the heated gaseous stream of step (a) through a heated zone having a temperature of at least about 350° C. wherein it contacts a catalytic amount of a ruthenium-platinum catalyst said catalysts being present, based on the noble metal content thereof, in the range of 1 to 20 parts of platinum per part of ruthenium.
Claim 15
Dependent Claim
55 words
The process of claim 12 wherein the chlorinated organic compounds are selected from the group consisting of vinyl choride and mixtures of C 1 chlorinated compounds and C 2 chlorinated compounds containing vinyl chloride wherein the total number of hydrogen atoms in the mixture is at least equal to the total number of chlorine atoms.
Claim 16
Dependent Claim
13 words
The process of claim 13 wherein the chlorinated organic compound is vinyl chloride.
Claim 17
Dependent Claim
32 words
The process of claim 14 wherein the temperature in step (a) is above 320° C. and the temperature in step (b) is in the range of about 350° to about 600° C.
Claim 18
Dependent Claim
32 words
The process of claim 15 wherein the temperature of step (a) is above 340° C. and the temperature of step (b) is in the range of about 400° to about 500° C.
References Cited (Backward Citations)
US3437445A
Cited
US3972979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |