US4585533A
Expired / Lapsed
US
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Removal of halogen from polyhalogenated compounds by electrolysis
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1985-04-19
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Granted: 1986-04-29
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Expires: 2005-04-19
Abstract
Abstract A method for electrochemically removing halogen from a halogenated compound utilizing an electrically conducting liquid medium in an electrolytic cell is disclosed. Halogen is extracted and reacted with a metal present in the sacrificial anode to form a relatively insoluble metal halide salt. The invention is of particular utility in removing halogen from aromatic and aliphatic compounds.
Inventors
- 👤 Jacob J. Habeeb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:56
CPC Classifications
A; A62; A62D; A62D3/00; A62D3/10; A62D3/11; A62D3/115; C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; A62D2101/00; A62D2101/20; A62D2101/22; C02F1/463; C02F2101/00; C02F2101/30; C02F2101/36
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
90 words
A method for electrochemically removing halogen from a halogenated compound in an electrolytic cell, said method comprising: A. adding the halogenated compound to an electrolytic cell comprising: i. a sacrificial anode selected from the group consisting of transition metals, lithium, potassium, sodium, indium, titanium, gallium and mixtures thereof; ii. a cathode; and, iii. an electrically conducting liquid medium; B. applying an electrical current to the electrolytic cell whereby halogen in the halogenated compound is extracted and reacted with a metal present in the sacrificial anode to form a metal halide.
Claim 2
Independent Claim
90 words
A method for electrochemically removing halogen from a halogenated compound in an electrolytic cell, said method comprising: A. adding the halogenated compound to an electrolytic cell comprising: i. a sacrificial anode selected from the group consisting of transition metals, lithium, potassium, sodium, indium, titanium, gallium and mixtures thereof; ii. a cathode; and, iii. an electrically conducting liquid medium; B. applying an electrical current to the electrolytic cell whereby halogen in the halogenated compound is extracted and reacted with a metal present in the sacrificial anode to form a metal halide.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the current applied to the electrolytic cell ranges between about 50 milliamps and about 1 amp.
Claim 4
Dependent Claim
21 words
The method of claim 2 wherein the current applied to the electrolytic cell ranges between about 100 and about 400 milliamps.
Claim 5
Dependent Claim
21 words
The method of claim 2 wherein the voltage applied to the electrolytic cell ranges between about 2 and about 50 volts.
Claim 6
Dependent Claim
21 words
The method of claim 4 wherein the voltage applied to the electrolytic cell ranges between about 10 and about 20 volts.
Claim 7
Dependent Claim
32 words
The method of claim 4 wherein the electrically conducting liquid medium electrolyte is selected from the group of solvents consisting of amines, amides, imides, nitriles, alcohols, ketones, acids, water and mixtures thereof.
Claim 8
Dependent Claim
28 words
The method of claim 6 wherein the electrically conducting liquid medium further comprises an electrolyte selected from the group consisting of tetraalkylammonium halide, tetraalkylammonium perchlorate, or mixtures thereof.
Claim 9
Dependent Claim
26 words
The method of claim 6 wherein the anode is selected from the group consisting of transition metals, lithium, potassium, sodium, indium, titanium, gallium, and mixtures thereof.
Claim 10
Dependent Claim
22 words
The method of claim 8 wherein the anode is selected from the group consisting of copper, iron, zinc, lithium and mixtures thereof.
Claim 11
Dependent Claim
16 words
The method of claim 9 wherein the cathode is selected from iron, carbon and mixtures thereof.
Claim 12
Dependent Claim
20 words
The method of claim 10 wherein the halogen removed from the halogenated compound forms a relatively insoluble metal halide salt.
Claim 13
Dependent Claim
16 words
The method of claim 11 wherein the metal halide salt is removed by precipitation and/or filtration.
Claim 14
Dependent Claim
13 words
The method of claim 11 wherein the halogenated compound comprises a halogenated hydrocarbon.
Claim 15
Dependent Claim
21 words
The method of claim 13 wherein the halogenated hydrocarbon is selected from the group consisting of halogenated aromatics and halogenated aliphatics.
Claim 16
Dependent Claim
13 words
The method of claim 13 wherein the halogenated hydrocarbon comprises a chlorinated hydrocarbon.
Claim 17
Dependent Claim
13 words
The method of claim 15 wherein the chlorinated hydrocarbon comprises a polychlorinated biphenyl.
Claim 18
Dependent Claim
24 words
The method of claim 16 wherein the concentration of polychlorinatd biphenyl in the solution ranges between about 2 ppm and about 90 weight percent.
Claim 19
Dependent Claim
25 words
The method of claim 17 wherein the concentration of the polychlorinated biphenyl in the solution ranges between about 2 ppm and about 50 weight percent.
Claim 20
Independent Claim
136 words
A method for electrochemically removing halogen from a halogenated hydrocarbon in an electrolytic cell, said method comprising: A. adding the halogenated hydrocarbon to an electrolytic cell comprising: i. a sacrificial anode selected from the group of metals consisting of copper, iron, zinc, lithium and mixtures thereof; ii. a cathode selected from the group consisting of iron, carbon and mixtures thereof; iii. an electrically conducting liquid medium comprising a solvent and an electrolyte; B. applying a current ranging between about 50 milliamps and about 1 amp, at a voltage ranging between about 2 and about 50 volts to the electrolytic cell whereby halogen in the halogenated compound is extracted and reacted with a metal present in the sacrificial anode, to form a relatively insoluble metal halide salt; C. removing the metal halide salt by precipitation and/or filtration.
Claim 21
Independent Claim
136 words
A method for electrochemically removing halogen from a halogenated hydrocarbon in an electrolytic cell, said method comprising: A. adding the halogenated hydrocarbon to an electrolytic cell comprising: i. a sacrificial anode selected from the group of metals consisting of copper, iron, zinc, lithium and mixtures thereof; ii. a cathode selected from the group consisting of iron, carbon and mixtures thereof; iii. an electrically conducting liquid medium comprising a solvent and an electrolyte; B. applying a current ranging between about 50 milliamps and about 1 amp, at a voltage ranging between about 2 and about 50 volts to the electrolytic cell whereby halogen in the halogenated compound is extracted and reacted with a metal present in the sacrificial anode, to form a relatively insoluble metal halide salt; C. removing the metal halide salt by precipitation and/or filtration.
References Cited (Backward Citations)
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| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
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