CA2391424A1 - Method for the demolition and the removal of halogenated and aromatic hydrocarbons from materials that contain them - Google Patents
Method for the demolition and the removal of halogenated and aromatic hydrocarbons from materials that contain them Download PDFInfo
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- CA2391424A1 CA2391424A1 CA002391424A CA2391424A CA2391424A1 CA 2391424 A1 CA2391424 A1 CA 2391424A1 CA 002391424 A CA002391424 A CA 002391424A CA 2391424 A CA2391424 A CA 2391424A CA 2391424 A1 CA2391424 A1 CA 2391424A1
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- Prior art keywords
- acid
- alkaline
- treatment
- alkaline environment
- halogenated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 title claims abstract description 16
- 150000004945 aromatic hydrocarbons Chemical class 0.000 title claims abstract description 9
- 150000008282 halocarbons Chemical class 0.000 title claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 19
- 239000002253 acid Substances 0.000 claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 6
- 239000011701 zinc Substances 0.000 claims abstract description 6
- NFMAZVUSKIJEIH-UHFFFAOYSA-N bis(sulfanylidene)iron Chemical compound S=[Fe]=S NFMAZVUSKIJEIH-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 3
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 3
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- 235000010755 mineral Nutrition 0.000 claims description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 4
- 229910052683 pyrite Inorganic materials 0.000 claims description 4
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000011028 pyrite Substances 0.000 claims description 2
- 239000001117 sulphuric acid Substances 0.000 claims description 2
- 235000011149 sulphuric acid Nutrition 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims 1
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 12
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 12
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical group CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 8
- 239000008346 aqueous phase Substances 0.000 description 8
- 239000007790 solid phase Substances 0.000 description 8
- 125000003118 aryl group Chemical group 0.000 description 7
- 125000006003 dichloroethyl group Chemical group 0.000 description 7
- 239000002699 waste material Substances 0.000 description 6
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 4
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 4
- 229940078552 o-xylene Drugs 0.000 description 4
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 4
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- 229910052960 marcasite Inorganic materials 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 125000004965 chloroalkyl group Chemical group 0.000 description 1
- 150000007938 chlorocyclic compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 239000012056 semi-solid material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/34—Dehalogenation using reactive chemical agents able to degrade
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/22—Organic substances containing halogen
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Fire-Extinguishing Compositions (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Treating Waste Gases (AREA)
- Catalysts (AREA)
Abstract
Method for the demolition and the removal of halogenated and aromatic hydrocarbons from materials that contain them, characterised in that the material to be treated is made to react - in an acid and/or alkaline environment, or vice versa - with a reagent selected from the group comprising zinc, iron, iron disulphide, ferrous sulphide, ferrous sulphate and mixtures thereof.
Description
Method for the demolition and the removal of halogenated and aromatic hydrocarbons from materials that contain them.
The present invention relates to the field of the processing of wastes, both of aqueous and of solid matrix, contaminated by halogenated and aromatic hydrocarbons.
As it is known, according to current laws such wastes must be destroyed by thermal way or, alternatively, may be incorporated in semisolid materials and dumped in specially provided dangerous waste dumps. The latter technique, whose safety however, from the point of view of the guarantee of stability over time, has not been proved once and for all, presents the drawback of utilising dumps, in case usable for more suitable materials, and to postpone the natural transformation, essential to avoid negative effects on our planet.
On the contrary, thermal destruction technique constitutes the most widely encouraged solution for a radical and final elimination of the disposal problem.
However, given the delicacy of the treatment (formation of demolition intermediates and/or of highly toxic substances) this technique requires a particular care, thereby making essential the resorting to sophisticated plants with very high costs.
Therefore, in this specific field the demand exists for the availability of a simple and low-cost method capable of transforming halogenated and aromatic hydrocarbons present in wastes into atoxic materials, without thereby causing negative environmental impacts.
The present invention allows to meet this demand thoroughly, further showing other advantages that shall be evident hereinafter.
Therefore, the subject of the present invention is a method for the demolition and the removal of halogenated and aromatic hydrocarbons from materials that contain them, characterised in that the materials to be treated is made to react - in an acid and/or alkaline environment, or viceversa - with a reagent selected from the group comprising zinc, iron, iron disulphide, ferrous sulphide, ferrous sulphate and mixtures thereof.
Treatment in acid invironment is preferably carried out at a pH lesser than 6.
The acid environment may be obtained with the addition of a mineral acid, preferably selected from the group comprising sulphuric acid, hydrochloride acid and combinations thereof.
The present invention relates to the field of the processing of wastes, both of aqueous and of solid matrix, contaminated by halogenated and aromatic hydrocarbons.
As it is known, according to current laws such wastes must be destroyed by thermal way or, alternatively, may be incorporated in semisolid materials and dumped in specially provided dangerous waste dumps. The latter technique, whose safety however, from the point of view of the guarantee of stability over time, has not been proved once and for all, presents the drawback of utilising dumps, in case usable for more suitable materials, and to postpone the natural transformation, essential to avoid negative effects on our planet.
On the contrary, thermal destruction technique constitutes the most widely encouraged solution for a radical and final elimination of the disposal problem.
However, given the delicacy of the treatment (formation of demolition intermediates and/or of highly toxic substances) this technique requires a particular care, thereby making essential the resorting to sophisticated plants with very high costs.
Therefore, in this specific field the demand exists for the availability of a simple and low-cost method capable of transforming halogenated and aromatic hydrocarbons present in wastes into atoxic materials, without thereby causing negative environmental impacts.
The present invention allows to meet this demand thoroughly, further showing other advantages that shall be evident hereinafter.
Therefore, the subject of the present invention is a method for the demolition and the removal of halogenated and aromatic hydrocarbons from materials that contain them, characterised in that the materials to be treated is made to react - in an acid and/or alkaline environment, or viceversa - with a reagent selected from the group comprising zinc, iron, iron disulphide, ferrous sulphide, ferrous sulphate and mixtures thereof.
Treatment in acid invironment is preferably carried out at a pH lesser than 6.
The acid environment may be obtained with the addition of a mineral acid, preferably selected from the group comprising sulphuric acid, hydrochloride acid and combinations thereof.
Treatment in alkaline environment is preferably carried out at a pH greater than 8.
The alkaline environment may be obtained with the addition of an alkaline or an alkaline earth base, preferably selected from the group comprising sodium hydroxide (NaOH), potassium hydroxide (KOH), calcium hydroxide (Ca(OH)2) and combinations thereof.
The duration of the acid environment treatment is greater than one hour, and is usually comprised within the range 1-1.5 hours. The temperature of the acid environment treatment is higher than 0°C and is usually comprised within the range 10-50°C, room temperature being preferable.
The duration of the alkaline environment treatment is greater than one hour, and is usually comprised within the range 1-1.5 hours. The temperature of the alkaline environment treatment is higher than 0°C and is usually comprised within the range 10-50°C, room temperature being preferable.
Iron disulphide may be the one contained in the mineral pyrite.
The reagent can be utilised in a dispersed form to be admixed to the material to be treated, or placed inside a column or container wherein the material to be treated is circulated forcibly.
The method according to the present invention presents, besides the advantages explicitly and implicitly aforementioned, the advantage of preventing the formation of new toxic substances and above all, not being a thermodistructive method, of not generating new emissions, containing hydrochloric acid and carbon dioxide among other things.
The method of the present invention can be advantageously adopted in the treatment of wastes of different origin, among which the ones hereinafter are indicated by way of explanation:
- petrochemical industry tailings;
tailings deriving from craft and tertiary activities that imply the utilisation of chloroalkyls and chloroaromatics;
- pitches and distillation tails of chlorinated solvents;
- production wastes contaminated by polychlorodicoumarones, polychlorodibenzodioxins, active principles made of organic aliphatic and aromatic molecules chemically bound with halogens (chlorine, bromine, iodine).
The alkaline environment may be obtained with the addition of an alkaline or an alkaline earth base, preferably selected from the group comprising sodium hydroxide (NaOH), potassium hydroxide (KOH), calcium hydroxide (Ca(OH)2) and combinations thereof.
The duration of the acid environment treatment is greater than one hour, and is usually comprised within the range 1-1.5 hours. The temperature of the acid environment treatment is higher than 0°C and is usually comprised within the range 10-50°C, room temperature being preferable.
The duration of the alkaline environment treatment is greater than one hour, and is usually comprised within the range 1-1.5 hours. The temperature of the alkaline environment treatment is higher than 0°C and is usually comprised within the range 10-50°C, room temperature being preferable.
Iron disulphide may be the one contained in the mineral pyrite.
The reagent can be utilised in a dispersed form to be admixed to the material to be treated, or placed inside a column or container wherein the material to be treated is circulated forcibly.
The method according to the present invention presents, besides the advantages explicitly and implicitly aforementioned, the advantage of preventing the formation of new toxic substances and above all, not being a thermodistructive method, of not generating new emissions, containing hydrochloric acid and carbon dioxide among other things.
The method of the present invention can be advantageously adopted in the treatment of wastes of different origin, among which the ones hereinafter are indicated by way of explanation:
- petrochemical industry tailings;
tailings deriving from craft and tertiary activities that imply the utilisation of chloroalkyls and chloroaromatics;
- pitches and distillation tails of chlorinated solvents;
- production wastes contaminated by polychlorodicoumarones, polychlorodibenzodioxins, active principles made of organic aliphatic and aromatic molecules chemically bound with halogens (chlorine, bromine, iodine).
So far, only a general disclosure of the present invention was given. With the aid of the examples hereinafter, a more detailed description will now be given of its embodiments, directed towards making the objects, features, advantages and operative modalities of the present invention better understood.
Example 1 An oily emulsion originated from a petrochemical plant with the composition hereinafter expressed as mg/1:
Trans 1-2 dichloroethyl 0.96 Cis 1-2 dichloroethyl 0.81 Chloroform 3.60 1-2 Dichloroethane 313.92 Trichloroethylene 0.16 1-1-2 Trichloroethane 2.40 is treated according to the invention with a mixture constituted of 33.3 % by weight Fe, 16.7 % Zn and 50 % FeSZ in a ratio of 3 g of mixture per 100 ml of oily emulsion.
The post-treatment aqueous phase contains 0,18 mg/1 chloroform and 0.05 mg/1 1-2 dichloroethane. The post-treatment solid phase contains only 0.37 mg/1 1-2 di-chloroethane.
Therefore it is observed that in the aqueous phase the chlorinated products were abated from 321.85 mg/1 to 0.23 mg/1 (with a 99.93 % yield), whereas in the solid phase the chlorinated products were abated from 321.85 to 0.71 mg/1 (with a 99.88 yield).
Example 2 An oily emulsion originated from a petrochemical plant with the composition hereinafter expressed as mg/l:
Trans 1-2 dichloroethyl 2.30 Chloroform 6.00 1-2 Dichloroethane 470.00 Trichloroethylene 0.31 1-2-3 Trichloroethane 4.02 Perchloroethylene 0.24 o-xylene 0.43 is treated according to the invention with a mixture constituted of 75 % by weight Fe, 25 % Zn in a ratio of 3 g of mixture per 100 ml of oily emulsion. The post-treatment aqueous phase contains only 0,17 mg/1 chloroform and 0.13 m1/1 1-2 dichloroethane.
The post-treatment solid phase contains only 0.31 mg/1 chloroform and 0.25 mg/1 1-2 dichloroethane.
Therefore it is observed that in the aqueous phase the chlorinated and aromatic products were abated from 482.87 to 0.30 (with a 99.94 % yield) and from 0.43 to 0.00 mg/1 (with a 100 % yield), respectively, whereas in the solid phase the chlorinated and aromatic products were abated from 482.87 mg/1 to 0.56 mg/1 (with a 99.88 %
yield) and from 0.43 mg/1 to 0.00 mg/1 (with a 100 % yield), respectively.
Example 3 An artificial mix prepared in laboratory with water and solid sludge (about 70 %) and having the composition in mg/1 hereinafter:
1-2 Dichloroethane 729.94 Benzene 370.90 Trichloroethylene 825.47 Toluol 698.08 Perchloroethylene 1358.27 o-xylene 854.04 is treated according to the invention with a mixture constituted of 25 % by weight FeS04 and 75 % FeS2 in a ratio of 3 g of mixture per 100 ml of the artificial mix to be 3 0 treated.
The post-treatment aqueous phase contains only 0.17 mg/1 1-2 dichloroethane.
The post-treatment solid phase contains only 0.43 mg/1 1-2 dichloroethane, 0.01 mg/1 benzene and 0.18 mg/1 o-xylene.
Example 1 An oily emulsion originated from a petrochemical plant with the composition hereinafter expressed as mg/1:
Trans 1-2 dichloroethyl 0.96 Cis 1-2 dichloroethyl 0.81 Chloroform 3.60 1-2 Dichloroethane 313.92 Trichloroethylene 0.16 1-1-2 Trichloroethane 2.40 is treated according to the invention with a mixture constituted of 33.3 % by weight Fe, 16.7 % Zn and 50 % FeSZ in a ratio of 3 g of mixture per 100 ml of oily emulsion.
The post-treatment aqueous phase contains 0,18 mg/1 chloroform and 0.05 mg/1 1-2 dichloroethane. The post-treatment solid phase contains only 0.37 mg/1 1-2 di-chloroethane.
Therefore it is observed that in the aqueous phase the chlorinated products were abated from 321.85 mg/1 to 0.23 mg/1 (with a 99.93 % yield), whereas in the solid phase the chlorinated products were abated from 321.85 to 0.71 mg/1 (with a 99.88 yield).
Example 2 An oily emulsion originated from a petrochemical plant with the composition hereinafter expressed as mg/l:
Trans 1-2 dichloroethyl 2.30 Chloroform 6.00 1-2 Dichloroethane 470.00 Trichloroethylene 0.31 1-2-3 Trichloroethane 4.02 Perchloroethylene 0.24 o-xylene 0.43 is treated according to the invention with a mixture constituted of 75 % by weight Fe, 25 % Zn in a ratio of 3 g of mixture per 100 ml of oily emulsion. The post-treatment aqueous phase contains only 0,17 mg/1 chloroform and 0.13 m1/1 1-2 dichloroethane.
The post-treatment solid phase contains only 0.31 mg/1 chloroform and 0.25 mg/1 1-2 dichloroethane.
Therefore it is observed that in the aqueous phase the chlorinated and aromatic products were abated from 482.87 to 0.30 (with a 99.94 % yield) and from 0.43 to 0.00 mg/1 (with a 100 % yield), respectively, whereas in the solid phase the chlorinated and aromatic products were abated from 482.87 mg/1 to 0.56 mg/1 (with a 99.88 %
yield) and from 0.43 mg/1 to 0.00 mg/1 (with a 100 % yield), respectively.
Example 3 An artificial mix prepared in laboratory with water and solid sludge (about 70 %) and having the composition in mg/1 hereinafter:
1-2 Dichloroethane 729.94 Benzene 370.90 Trichloroethylene 825.47 Toluol 698.08 Perchloroethylene 1358.27 o-xylene 854.04 is treated according to the invention with a mixture constituted of 25 % by weight FeS04 and 75 % FeS2 in a ratio of 3 g of mixture per 100 ml of the artificial mix to be 3 0 treated.
The post-treatment aqueous phase contains only 0.17 mg/1 1-2 dichloroethane.
The post-treatment solid phase contains only 0.43 mg/1 1-2 dichloroethane, 0.01 mg/1 benzene and 0.18 mg/1 o-xylene.
Therefore it is observed that in the aqueous phase the chlorinated and aromatic products were abated from 2913.68 mg/1 to 0.17 mg/1 (with a 99.99 % yield) and from 1923.02 to 0.00 mg/1 (with a 100 % yield), respectively, whereas in the solid phase the chlorinated and aromatic products were abated from 2913.68 mg/1 to 0.43 mg/1 (with a 5 99.99 % yield) and from 1923.02 mg/1 to 0.19 mg/1 (with a 99.99 % yield), respectively.
Example 4 An artificial mix prepared in laboratory with water and solid sludge (about 70 %) and having the composition expressed in mg/1 hereinafter:
Trans 1-2-dichloroethyl 0.92 Cis 1-2 dichloroethyl 1.24 Chloroform 4.16 1-2 Dichloroethane 11.66 Benzene 0.76 Trichloroethylene 3.72 1-1-2 Trichloroethane 3.28 Toluol 0.70 Perchloroethylene 5.58 Ethylbenzol 0.98 p-xylene 0.91 o-xylene 0.99 is treated according to the invention with a mixture constituted of 16.7 % by weight Zn, 33.33 % by weight FeS04, and 50 % FeS2 in a ratio of 3 g of mixture per 100 ml of the artificial mix.
The post-treatment aqueous phase contains only 0.07 mg/1 trans 1-2 dichloroethyl, 0.13 mg/1 1-2 dichloroethane and 0.02 mg/1 trichloroethane. The post-treatment solid phase contains only 0.43 mg/1 trans 1-2 dichloroethyl, 0.86 mg/1 cis 1-2 dichloroethyl and 1.07 mg/1 1-1-2 dichloroethane.
Therefore it is observed that in the aqueous phase the chlorinated and aromatic products were abated from 30.58 mg/1 to 0.22 mg/1 (with a 99.27 % yield) and from 4.34 mg/1 to 0.00 mg/1 (with a 100 % yield), respectively, whereas in the solid phase the chlorinated and aromatic products were abated from 30.58 mg/1 to 2.36 mg/1 (with a 96.28 % yield) and from 4.34 mg/1 to 0.00 mg/1 (with a 100 % yield), respectively.
Example 4 An artificial mix prepared in laboratory with water and solid sludge (about 70 %) and having the composition expressed in mg/1 hereinafter:
Trans 1-2-dichloroethyl 0.92 Cis 1-2 dichloroethyl 1.24 Chloroform 4.16 1-2 Dichloroethane 11.66 Benzene 0.76 Trichloroethylene 3.72 1-1-2 Trichloroethane 3.28 Toluol 0.70 Perchloroethylene 5.58 Ethylbenzol 0.98 p-xylene 0.91 o-xylene 0.99 is treated according to the invention with a mixture constituted of 16.7 % by weight Zn, 33.33 % by weight FeS04, and 50 % FeS2 in a ratio of 3 g of mixture per 100 ml of the artificial mix.
The post-treatment aqueous phase contains only 0.07 mg/1 trans 1-2 dichloroethyl, 0.13 mg/1 1-2 dichloroethane and 0.02 mg/1 trichloroethane. The post-treatment solid phase contains only 0.43 mg/1 trans 1-2 dichloroethyl, 0.86 mg/1 cis 1-2 dichloroethyl and 1.07 mg/1 1-1-2 dichloroethane.
Therefore it is observed that in the aqueous phase the chlorinated and aromatic products were abated from 30.58 mg/1 to 0.22 mg/1 (with a 99.27 % yield) and from 4.34 mg/1 to 0.00 mg/1 (with a 100 % yield), respectively, whereas in the solid phase the chlorinated and aromatic products were abated from 30.58 mg/1 to 2.36 mg/1 (with a 96.28 % yield) and from 4.34 mg/1 to 0.00 mg/1 (with a 100 % yield), respectively.
Claims (16)
1. Method for the demolition and the removal of halogenated and aromatic hydrocarbons from materials that contain the, characterised in that the material to treat is made reacting - in an acid and/or alkaline environment, or viceversa - with a reagent selected from the group comprising zinc, iron, iron disulphide, ferrous sulphide, ferrous sulphate and mixtures thereof.
2. Method for the demolition and the removal of halogenated and aromatic hydrocarbons from materials that comprise them according to claim 1, wherein the acid environment treatment is carried out at a pH lesser than 6.
3. Method according to claim 1 or 2, wherein the acid environment is obtained by the addition of a mineral acid.
4. Method according to claim 3, wherein the mineral acid is selected from the group comprising sulphuric acid, hydrochloric acid and combinations thereof.
5. Method according to any one of the preceding claims, wherein the alkaline environment treatment is carried out at a pH greater than 8.
6. Method according to claim 5, wherein the alkaline environment is obtained with the addition of an alkaline or an alkaline earth base.
7. Method according to claim 6, wherein the alkaline or alkaline earth base is selected from the group comprising sodium hydroxide, potassium hydroxide, calcium hydroxide and combinations thereof.
8. Method according to any one of the preceding claims, wherein the treatment duration in an acid as well as in an alkaline environment is above one hour.
9. Method according to claim 8, wherein the treatment duration in an acid as well as in an alkaline environment is comprised within the range 1-1.5 hours.
10. Method according to any one of the preceding claims, wherein the treatment temperature in an acid as well as in an alkaline environment is higher than 0°C.
11. Method according to claim 10, wherein the treatment temperature in an acid as well as in an alkaline environment is comprised within the range 10-50°C.
12. Method according to claim 11, wherein the treatment temperature in an acid as well as in an alkaline environment is room temperature.
13. Method according to any one of the preceding claims, wherein the reagent is in dispersed form and is mixed to the material to be treated.
14. Method according to any one of the claims from 1 to 12, wherein the reagent is placed inside a column or container wherein the material to be treated is circulated forcibly.
15. Method according to any one of the preceding claims, wherein the iron disulphide is the one contained in the mineral pyrite.
16. Method for the demolition and the removal of halogenated and aromatic hydrocarbons from materials that contain them, as previously described, exemplified and claimed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1013558A NL1013558C2 (en) | 1999-11-11 | 1999-11-11 | Process for the decomposition and removal of halogenated and aromatic hydrocarbons from materials containing them. |
| NL1013558 | 1999-11-11 | ||
| PCT/NL2000/000827 WO2001034245A1 (en) | 1999-11-11 | 2000-11-13 | Method for the demolition and the removal of halogenated and aromatic hydrocarbons from materials that contain them |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2391424A1 true CA2391424A1 (en) | 2001-05-17 |
Family
ID=19770242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002391424A Abandoned CA2391424A1 (en) | 1999-11-11 | 2000-11-13 | Method for the demolition and the removal of halogenated and aromatic hydrocarbons from materials that contain them |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1227860A1 (en) |
| CN (1) | CN1414872A (en) |
| AU (1) | AU1742001A (en) |
| CA (1) | CA2391424A1 (en) |
| EA (1) | EA200200556A1 (en) |
| NL (1) | NL1013558C2 (en) |
| PL (1) | PL355748A1 (en) |
| WO (1) | WO2001034245A1 (en) |
| ZA (1) | ZA200203790B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3410239A1 (en) * | 1984-03-21 | 1985-10-03 | Hivolin Gmbh | Process for the elimination of toxic polyhalogenated or perhalogenated organic compounds |
| DE3810707A1 (en) * | 1988-03-26 | 1989-10-05 | Johannes Mandl | Process for disposing of organic chlorine compounds by reaction with metals or oxides, with formation of metal chlorides |
| US5197823A (en) * | 1992-01-08 | 1993-03-30 | Reynolds Metals Company | Method and apparatus for treating PCB-containing soil |
| US5362402A (en) * | 1994-03-25 | 1994-11-08 | General Electric Company | Enhanced remediation of aqueous compositions contaminated with halogenated hydrocarbons |
| JPH07265461A (en) * | 1994-04-01 | 1995-10-17 | Ebara Corp | Method for decomposing aromatic halogen compound |
| US5362404A (en) * | 1994-04-04 | 1994-11-08 | General Electric Company | Dehalogenation of halogenated hydrocarbons in aqueous compositions |
-
1999
- 1999-11-11 NL NL1013558A patent/NL1013558C2/en not_active IP Right Cessation
-
2000
- 2000-11-13 EA EA200200556A patent/EA200200556A1/en unknown
- 2000-11-13 WO PCT/NL2000/000827 patent/WO2001034245A1/en not_active Application Discontinuation
- 2000-11-13 CA CA002391424A patent/CA2391424A1/en not_active Abandoned
- 2000-11-13 AU AU17420/01A patent/AU1742001A/en not_active Abandoned
- 2000-11-13 CN CN 00818135 patent/CN1414872A/en active Pending
- 2000-11-13 EP EP00980121A patent/EP1227860A1/en not_active Withdrawn
- 2000-11-13 PL PL00355748A patent/PL355748A1/en unknown
-
2002
- 2002-05-13 ZA ZA200203790A patent/ZA200203790B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL355748A1 (en) | 2004-05-17 |
| WO2001034245A1 (en) | 2001-05-17 |
| EP1227860A1 (en) | 2002-08-07 |
| NL1013558C2 (en) | 2001-05-14 |
| ZA200203790B (en) | 2003-08-27 |
| AU1742001A (en) | 2001-06-06 |
| CN1414872A (en) | 2003-04-30 |
| EA200200556A1 (en) | 2002-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20051114 |