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US5108647A
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Method of dehalogenating halogenated hydrocarbons
Assignee: Individual
•
Filing: 1991-03-26
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Granted: 1992-04-28
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Expires: 2011-03-26
Abstract
Abstract A method of dehalogenating a halogenated hydrocarbon in the presence of a nucleophilic reaction partner, comprising dispersing the halogenated hydrocarbon by chemical reaction (DCR), and dehalogenating the resulting finely dispersed reaction product by means of a strictly chemical conversion with the nucleophilic reaction partner at a temperature between ambient temperature and approximately 510° C.
Inventors
- 👤 Friedrich Bolsing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:09
CPC Classifications
A; A62; A62D; A62D3/00; A62D3/30; A62D3/34; A62D2101/00; A62D2101/20; A62D2101/22; A62D2101/28; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
70 words
A method of dehalogenating a highly toxic aromatic material that contains halogen, including compounds such as polychlorinated biphenyl, dibenzodioxins, dibenzofurnas and other such polycyclic aromatics, in the presence of a nucleophilic reaction partner, comprising dispersing the halogenated hydrocarbon by chemical reaction (DCR), and dehalogenating the resulting finely dispersed reaction product by means of chemical reaction with the nucleophilic reaction partner at a temperature between ambient temperature and approximately 510° C.
Claim 2
Independent Claim
70 words
A method of dehalogenating a highly toxic aromatic material that contains halogen, including compounds such as polychlorinated biphenyl, dibenzodioxins, dibenzofurnas and other such polycyclic aromatics, in the presence of a nucleophilic reaction partner, comprising dispersing the halogenated hydrocarbon by chemical reaction (DCR), and dehalogenating the resulting finely dispersed reaction product by means of chemical reaction with the nucleophilic reaction partner at a temperature between ambient temperature and approximately 510° C.
Claim 3
Dependent Claim
28 words
A method according to claim 1, wherein the highly toxic aromatic material that contains halogen, is dispersed by chemical reaction in the presence of the nucleophilic reaction partner.
Claim 4
Dependent Claim
22 words
A method according to claim 1, wherein the nucleophilic reaction partner is derived from the educt of the dispersion by chemical reaction.
Claim 5
Dependent Claim
26 words
A method according to claim 3, wherein the nucleophilic reaction partner is calcium hydroxide derived from calcium oxide as the educt of the dispersing chemical reaction.
Claim 6
Dependent Claim
22 words
A method according to claim 1, wherein the nucleophilic reaction partner is an alkali hydroxide, alkali alcoholate, alkaline-earth hydroxide, alcohol or amine.
Claim 7
Dependent Claim
32 words
A method according to claim 1, wherein the finely dispersed reaction product is heated to precisely the requisite dehalogenation temperature as rapidly as possible in the presence of the nucleophilic reaction partner.
Claim 8
Dependent Claim
16 words
A method according to claim 1, wherein the dehalogenation is effected in a closed reaction space.
Claim 9
Dependent Claim
27 words
A method according to claim 7, wherein the reaction space is occupied as completely as possible by the finely dispersed reaction product and the nucleophilic reaction partner.
Claim 10
Dependent Claim
16 words
A method according to claim 1, wherein the dehalogenation is carried out discontinuously in an autoclave.
Claim 11
Dependent Claim
19 words
A method according to claim 1, wherein the dehalogenation is carried out continuously in a fluidized-bed or static-bed reactor.
Claim 12
Dependent Claim
22 words
A method according to claim 1, wherein the dispersion by chemical reaction and the dehalogenation are carried out in the same step.
Claim 13
Dependent Claim
19 words
A method according to claim 1, wherein the highly toxic aromatic material that contains halogen, is a polychlorinated aromatic.
Claim 14
Dependent Claim
17 words
A method according to claim 12, wherein the polychlorinated aromatic is a chlorinated biphenyl or chlorinated dioxin.
Claim 15
Dependent Claim
25 words
A method according to claim 1, wherein the highly toxic aromatic material that contains halogen, is provided as a contaminated oil, sludge, slick or soil.
Claim 16
Dependent Claim
49 words
The method according to claim 13, wherein the highly toxic aromatic material that contains halogen, is mixed with calcium oxide, water is added in an amount to maintain the mixture dry and powdered and the mass is heated to about 510° C. for a time sufficient to effect dehydrohalogenation.
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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) | 1995-04-28 | 1995-10-28 | 1996-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-28 | 1999-10-28 | 2000-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-28 | 2003-10-28 | 2004-04-28 | $7700.00 | Window Closed / Lapsed |