DE19806001A1 - Dehalogenation of aqueous hydrocarbon solutions, e.g. ground- or waste water - Google Patents

Dehalogenation of aqueous hydrocarbon solutions, e.g. ground- or waste water

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Publication number
DE19806001A1
DE19806001A1 DE1998106001 DE19806001A DE19806001A1 DE 19806001 A1 DE19806001 A1 DE 19806001A1 DE 1998106001 DE1998106001 DE 1998106001 DE 19806001 A DE19806001 A DE 19806001A DE 19806001 A1 DE19806001 A1 DE 19806001A1
Authority
DE
Germany
Prior art keywords
dehalogenation
ground
waste water
nickel
zinc
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.)
Withdrawn
Application number
DE1998106001
Other languages
German (de)
Inventor
Berger
Kasper
Richter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE1998106001 priority Critical patent/DE19806001A1/en
Publication of DE19806001A1 publication Critical patent/DE19806001A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/70—Treatment of water, waste water, or sewage by reduction
    • C02F1/705—Reduction by metals
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • C07C1/26—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only halogen atoms as hetero-atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/23—Preparation of halogenated hydrocarbons by dehalogenation

Abstract

Dehalogenation of hydrocarbons dissolved in water is by contact with a porous body comprising Zn particles electrolytically coated with Ni.

Description

Die Erfindung richtet sich auf ein Verfahren zur Zerstörung von in Wasser gelösten halogenierten Kohlenwasserstoffen mit Hilfe von nullwertigem vernickeltem Zink. Da bei findet an der Zink- Oberfläche eine Redox-Reaktion statt, bei der das Zink oxidiert und die HKW reduziert werden. Diese Reaktion läßt sich auch als Hydrierreaktion beschreiben, in der das Halogen durch eine Wasserstoffatom ersetzt wird. Das nur in geringen Mengen auf dem Zink-Körper gebrachte nullwertige Nickel fungiert dabei als Hydrierkatalysator. Nickel verbraucht sich in der Reaktion nicht. Wohingegen Zink als Reaktionspartner zu den halogenierten Stoffen gesehen wird.The invention relates to a method for the destruction of halogenated in water Hydrocarbons with the help of zero-value nickel-plated zinc. There takes place at the zinc A redox reaction takes place on the surface, in which the zinc is oxidized and the HKW is reduced. This reaction can also be described as a hydrogenation reaction in which the halogen is passed through a Hydrogen atom is replaced. That was only applied to the zinc body in small quantities Zero-valent nickel acts as a hydrogenation catalyst. Nickel is consumed in the reaction Not. Whereas zinc is seen as a reactant to the halogenated substances.

Die Erfindung baut auf das in DE 690 25 479T2 von Gillham patentierte Verfahren auf. Dort werden jedoch zur Zerstörung halogenierter Kohlenwasserstoffe im Wasser (resp. Grundwasser) Eisenpartikel eingesetzt.The invention is based on the method patented in DE 690 25 479T2 by Gillham. There are used to destroy halogenated hydrocarbons in water (or groundwater) Iron particles used.

Das Verfahren mit Zn-Ni-Körpern hat jedoch den außerordentlichen Vorteil, daß die Zerstörung wesentliche schneller von statten geht. Dadurch ist der Einsatzbereich dieser Reaktoren um ein vielfaches größer. Die Reaktordimensionen können klein gehalten und dadurch Kosten eingespart werden. Weiter wird wesentlich weniger Reaktionsmaterial gebraucht und somit können die Kosten nochmals reduziert werden.The method with Zn-Ni bodies has the extraordinary advantage that the destruction goes much faster. As a result, the area of application of these reactors is around one many times larger. The reactor dimensions can be kept small and thus costs be saved. Furthermore, much less reaction material is needed and therefore the costs can be reduced again.

Da die Reaktionen bereits bei niedrigen Temperaturen ablaufen ist der Einsatz auch in insitu im Grundwasser oder Abwasserstrom ohne vorherige Aufwärmung des Systems einsetzbar.Since the reactions take place at low temperatures, use is also possible in situ Groundwater or wastewater flow can be used without prior warming up of the system.

In der Patentschrift PCT US95/16529 werden paladisierte Eisenkörper zur Dehaloginierung eingesetzt. Dieses System hat jedoch den Nachteil, daß diese Stoffe sehr teuer in der Anschaffung sind. Der Zink-Nickel-Körper ist billig in der Anschaffung und hat daher große Vorteile gegenüber der Eisen-Palladium-Methode.In the patent specification PCT US95 / 16529 paladized iron bodies are used for dehalogenation used. However, this system has the disadvantage that these substances are very expensive to produce  Purchase. The zinc-nickel body is inexpensive to purchase and therefore has a large size Advantages over the iron palladium method.

Die Reaktion läuft bei Zimmertemperatur und darunter ab. Um etwa 40 mg/l Tetrachlorethen vollkommen zu zerstören werden weniger als 4 Stunden benötigt. Zerstört werden mit diesem Verfahren bevorzugt die Stoffe, Trichlorethen, Trichlorethan, Tetrachlorethen und cis-1,2 Dichlorethen.The reaction takes place at room temperature and below. Around 40 mg / l tetrachloroethene completely destroy it takes less than 4 hours. Be destroyed with this Process prefers the substances, trichlorethylene, trichloroethane, tetrachlorethylene and cis-1,2 Dichloroethene.

Das Zink ist in Form eines Pulvers bzw. Granulates von Korngrößen von 0,01 mm bis 3 mm und wurde mittels einer Nickelchlorid-Lösung mit Nickel teilweise galvanisch überzogen. Das Nickel ist fest auf die Zinkoberfläche gebunden und nimmt an der Hydrierfunktion nur in sofern teil, als daß es die eigentliche Reaktion auf katalytischem Wege begünstigt.The zinc is in the form of a powder or granulate with grain sizes from 0.01 mm to 3 mm and was partially electroplated with nickel using a nickel chloride solution. The nickel is firmly bound to the zinc surface and only takes part in the hydrogenation function insofar as that it favors the actual reaction catalytically.

Die mit halogenierten Kohlenwasserstoffen versehene wäßrige Lösung wird durch den Zink- Nickel-Körper geleitet, so daß eine möglichst große Kontaktfläche zwischen Wasser und Zink- Nickel-Körper vorhanden ist. Die Dimension des Zink-Nickel-Körpers ist abhängig von den Gehalten an halogenen Kohlenwasserstoffen und von der erforderlichen Abreinigungsleistung.The aqueous solution provided with halogenated hydrocarbons is Nickel body so that the largest possible contact area between water and zinc Nickel body is present. The dimension of the zinc-nickel body depends on the Contained in halogenated hydrocarbons and the required cleaning performance.

Claims (2)

1. Eine Methode der Dehalogenierung von in Wasser gelösten Halogenwasserstoffen durch einen herbeigeführten Kontakt mit einen Zn-Ni-Körper, der porös ist und aus Zink-Partikel besteht, die mit Hilfe eines galvanischen Prozesses vernickelt wurden.1. A method of dehalogenation of hydrogen halides dissolved in water by induced contact with a Zn-Ni body that is porous and made of zinc particles exists that were nickel-plated using a galvanic process. 2. Die Methode des Anspruch 1, jedoch die Zn-Ni-Körper in physikalischer Mischung in Verhältnissen von Ni zu Zn von 0,01 bis 100%.2. The method of claim 1, however, the Zn-Ni body in physical mixture in Ratios of Ni to Zn from 0.01 to 100%.
DE1998106001 1998-02-16 1998-02-16 Dehalogenation of aqueous hydrocarbon solutions, e.g. ground- or waste water Withdrawn DE19806001A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1998106001 DE19806001A1 (en) 1998-02-16 1998-02-16 Dehalogenation of aqueous hydrocarbon solutions, e.g. ground- or waste water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1998106001 DE19806001A1 (en) 1998-02-16 1998-02-16 Dehalogenation of aqueous hydrocarbon solutions, e.g. ground- or waste water

Publications (1)

Publication Number Publication Date
DE19806001A1 true DE19806001A1 (en) 1999-08-19

Family

ID=7857674

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1998106001 Withdrawn DE19806001A1 (en) 1998-02-16 1998-02-16 Dehalogenation of aqueous hydrocarbon solutions, e.g. ground- or waste water

Country Status (1)

Country Link
DE (1) DE19806001A1 (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4382865A (en) * 1978-09-14 1983-05-10 Envirogenics Systems Company Treatment of reducible halohydrocarbon containing aqueous stream
EP0361581A1 (en) * 1988-09-26 1990-04-04 Solvay Process for the purification of aqueous acid effluents containing halogenated compounds
DE3839329A1 (en) * 1988-11-22 1990-05-31 Basf Ag METHOD FOR THE REDUCTIVE ENTHALOGENATION OF AROMATES
US4959155A (en) * 1989-05-23 1990-09-25 Luis Gomez Method for the purification of fluids such as water, aqueous fluids and fuel fluids
EP0389650A1 (en) * 1987-05-26 1990-10-03 The Dow Chemical Company Process and catalyst for the dehydrohalogenation of halogenated hydrocarbons or alkylene halohydrins
DE3941813C2 (en) * 1989-12-19 1992-01-30 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De
US5276240A (en) * 1991-10-18 1994-01-04 Board Of Regents, The University Of Texas System Catalytic hydrodehalogenation of polyhalogenated hydrocarbons
DE4236724A1 (en) * 1992-10-30 1994-05-05 Schering Ag Process for the recovery of iodine from iodinated organic compounds
US5411664A (en) * 1992-09-28 1995-05-02 W. R. Grace & Co.-Conn. Method for dehalogenation and degradation of halogenated organic contaminants
DE4407057A1 (en) * 1994-03-03 1995-09-07 Dechema Electrochemical degradation of halogenated hydrocarbon(s) in polluted water
EP0677501A1 (en) * 1994-04-14 1995-10-18 The Dow Chemical Company Hydrodechlorination process

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4382865A (en) * 1978-09-14 1983-05-10 Envirogenics Systems Company Treatment of reducible halohydrocarbon containing aqueous stream
EP0389650A1 (en) * 1987-05-26 1990-10-03 The Dow Chemical Company Process and catalyst for the dehydrohalogenation of halogenated hydrocarbons or alkylene halohydrins
EP0361581A1 (en) * 1988-09-26 1990-04-04 Solvay Process for the purification of aqueous acid effluents containing halogenated compounds
DE3839329A1 (en) * 1988-11-22 1990-05-31 Basf Ag METHOD FOR THE REDUCTIVE ENTHALOGENATION OF AROMATES
US4959155A (en) * 1989-05-23 1990-09-25 Luis Gomez Method for the purification of fluids such as water, aqueous fluids and fuel fluids
DE3941813C2 (en) * 1989-12-19 1992-01-30 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De
US5276240A (en) * 1991-10-18 1994-01-04 Board Of Regents, The University Of Texas System Catalytic hydrodehalogenation of polyhalogenated hydrocarbons
US5411664A (en) * 1992-09-28 1995-05-02 W. R. Grace & Co.-Conn. Method for dehalogenation and degradation of halogenated organic contaminants
DE4236724A1 (en) * 1992-10-30 1994-05-05 Schering Ag Process for the recovery of iodine from iodinated organic compounds
DE4407057A1 (en) * 1994-03-03 1995-09-07 Dechema Electrochemical degradation of halogenated hydrocarbon(s) in polluted water
EP0677501A1 (en) * 1994-04-14 1995-10-18 The Dow Chemical Company Hydrodechlorination process

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
6- 72900 A.,C-1214,June 20,1994,Vol.18,No.322 *
JP Patents Abstracts of Japan: 3-114589 A.,C- 856,Aug. 6,1991,Vol.15,No.306 *
SATO,Fumie, et.al.: Debromination of vic- Dibromides with Zinc and a Catalytic Amount of Titanium(IV) Chloride in Tetrahydrofuran. In: Synthesis 1982, H.12, S.1025,1026 *

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