EP0118858A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for the decomposition and decontamination of organic substances and halogenated toxic materials
Assignee: SEA MARCONI DECONTAMINATION Srl
•
Filing: 1984-03-03
•
Granted: —
•
Expires: 2004-03-03
Abstract
Abstract A method for the decomposition of an halogenated organic compound is described which comprises reacting the compound with a reagent which consists of a) at least one member which is a polyethyleneglycol, Nixolen (R) , an alcohol or a polyhydroxy compound, b) a base, and c) an oxidizing agent or a source of radicals, in the absence of oxygen. The method is applicable to the decontamination of mineral oils and soil contaminated with polychlorobiphenyls, polychlorodibenzofurans, polychlorodibenzo- dioxins, DDT and other halogenated organic compounds. The different possible formulations of such reagents allow the preparation of stable reactive mixture, which can be either liquid or solid; the liquid reagents are particularly suitable for the decontamination of porous surfaces such as cement, gres, asphalt and for the decontamination of parts of plants contaminated by PCBs. The use of microwaves during the decontamination process proved to be particularly advantageous.
Inventors
- 👤 Pietro Tundo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 17:12
CPC Classifications
A; A62; A62D; A62D3/00; A62D3/30; A62D3/38; A62D3/34; C; C07; C07D; C07D319/00; C07D319/10; C07D319/14; C07D319/24; A62D2101/00; A62D2101/20; A62D2101/22; A62D2101/40; A62D2101/47
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
199 words
A method for the decomposition of an halogenated-organic compounds which comprises reacting said compound with a reagent which consists of: a) at least one member selected from the group con sisting of polyethyleneglycols, Nixolens (R) , alcohols, polyhydroxy compounds, said polyethyleneglycols and alcohols having the formula wherein: x 2; n is zero or an integer from 2 to 400; R is a linear or branched C 1 -C 4 alkyl when n = 0; or is hydrogen, linear or branched C l -C 20 a l- kyl, aryl, aralkyl or acyl when n = 2-400; R 1 and R 2 , which may be the same or different, are hydrogen, linear or branched C 1 -C 4 alkyl, C 5 -C 8 cycloalkyl optionally substituted, op tionally substituted aryl Nixolens (R) being liquid compounds deriving from the condensation between propylene oxide and ethy lene oxide, said polyhydroxy compound having the general for mula wherein n is a number between 100 and 10,000, R 3 is hydrogen or linear or branched C 1 -C 6 alkyl; b) a weak base, or, when Nixolen (R) are used, alkali or alkali-earth metal alkoxides; c) an oxidizing agent or a source of radicals.
Claim 2
Independent Claim
199 words
A method for the decomposition of an halogenated-organic compounds which comprises reacting said compound with a reagent which consists of: a) at least one member selected from the group con sisting of polyethyleneglycols, Nixolens (R) , alcohols, polyhydroxy compounds, said polyethyleneglycols and alcohols having the formula wherein: x 2; n is zero or an integer from 2 to 400; R is a linear or branched C 1 -C 4 alkyl when n = 0; or is hydrogen, linear or branched C l -C 20 a l- kyl, aryl, aralkyl or acyl when n = 2-400; R 1 and R 2 , which may be the same or different, are hydrogen, linear or branched C 1 -C 4 alkyl, C 5 -C 8 cycloalkyl optionally substituted, op tionally substituted aryl Nixolens (R) being liquid compounds deriving from the condensation between propylene oxide and ethy lene oxide, said polyhydroxy compound having the general for mula wherein n is a number between 100 and 10,000, R 3 is hydrogen or linear or branched C 1 -C 6 alkyl; b) a weak base, or, when Nixolen (R) are used, alkali or alkali-earth metal alkoxides; c) an oxidizing agent or a source of radicals.
Claim 3
Dependent Claim
20 words
The method according to claim 1, wherein said weak base is an alkali or an alkaline earth carbonate or bicarbonate.
Claim 4
Dependent Claim
51 words
The method according to claim 1, wherein said oxidizing agent or said source of radicals is an alkali or alkaline earth metal peroxide or supero- xide, a persalt of an alkali or alkaline earth metal or ammonium, a salt of metal in a high valence state, alkylperoxide, alkylhydroperoxide, acylperoxide or azoisobutyronitrile.
Claim 5
Dependent Claim
28 words
The method according to claim 1, wherein the reagent comprises a polyethyleneglycol of the formula H(OCH2CH2)nOH, or an alkylether thereof, wherein n is as defined in claim 1.
Claim 6
Independent Claim
16 words
The method according to claims 1-3, wherein the reagent comprises water soluble Nixolen (R) VS type.
Claim 7
Dependent Claim
24 words
The method according to claim 5, characterized in that an alkali or alkali-earth metal alcoxide is used, in the absence of the oxidizing agent.
Claim 8
Dependent Claim
47 words
The method according to claim 1-6, wherein said halogenated organic compound is a chlorinated organic compound and the stoichiometric ratio between said base and chlorine is greater or equal to 1 and the stoichiometric ratio between said oxidizing agent and chlorine is greater or equal to 0.5.
Claim 9
Dependent Claim
42 words
8 The method according to claims 1-7, wherein said halogenated organic compound is at least one member selected from the group consisting of polych- lorodibenzodioxins, polychlorodibenzofurans, polych lorobiphenyls, polychlorobenzenes, polychlorophenols, hexachlorocyclohexane, dichlorodiphenyltrichloroetha- ne, decachloro octahydro-l,3,4-metheno-2H-cyclobuta- pentalen-2-one, and their brominated and fluorinated analogs.
Claim 10
Independent Claim
38 words
The method according to claims 1-8, wherein the reaction is carried out at room temperature, in the absence of air or oxygen and in the presence or in the absence of solvents miscible or immiscible with said reagent.
Claim 11
Independent Claim
45 words
The method for the decontamination and the recovery of industrial oil contaminated from an industrial process in its original physico-chemical properties, wherein said industrial oil is reacted at room temperature and in the absence of oxygen or air with the reagent according to claims 1-7.
Claim 12
Dependent Claim
26 words
ll. The method according to claim 10, wherein the reaction is carried out continuously and the industrial oil is maintained under stirring by ultraso nic treatment.
Claim 13
Independent Claim
76 words
The method for the decontamination of soil and surfaces contaminated by at least one polyhalogenat ed organic compound, characterized in that said soil or surface is covered with a layer of a reagent according to claims 1-7, and that a viscous or solid reagent is used for non porous surfaces and a liquid reagent is used for porous surfaces and a solid film is formed over said soil or surface and said solid film is removed.
Claim 14
Dependent Claim
24 words
The method according to claim 12 characterized in that the process is carried out in the presence of electric fields, ultrasounds, infrared laser, microwaves.
Claim 15
Dependent Claim
29 words
The method according to claim 12 characterized in that the process is carried out in the presence of microwaves and that the polluted surfaces are previously treated with microwaves.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.