Electrochemical hydroxide systems and methods using metal oxidation
First Claim
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1. A method, comprising:
- contacting an anode with an anode electrolyte wherein the anode electrolyte comprises saltwater and metal halide;
applying a voltage to the anode and cathode and oxidizing the metal halide from a lower oxidation state to a higher oxidation state at the anode wherein no gas is formed at the anode;
contacting the cathode with a cathode electrolyte; and
halogenating an unsaturated hydrocarbon or a saturated hydrocarbon with the anode electrolyte comprising the metal halide in the higher oxidation state, in an aqueous medium wherein the aqueous medium comprises more than 25 wt % water to result in a halohydrocarbon and the metal halide in the lower oxidation state, wherein yield of the halohydrocarbon is more than 80% by weight.
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Abstract
There are provided methods and systems for an electrochemical cell including an anode and a cathode where the anode is contacted with a metal ion that converts the metal ion from a lower oxidation state to a higher oxidation state. The metal ion in the higher oxidation state is reacted with hydrogen gas, an unsaturated hydrocarbon, and/or a saturated hydrocarbon to form products.
114 Citations
26 Claims
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1. A method, comprising:
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contacting an anode with an anode electrolyte wherein the anode electrolyte comprises saltwater and metal halide; applying a voltage to the anode and cathode and oxidizing the metal halide from a lower oxidation state to a higher oxidation state at the anode wherein no gas is formed at the anode; contacting the cathode with a cathode electrolyte; and halogenating an unsaturated hydrocarbon or a saturated hydrocarbon with the anode electrolyte comprising the metal halide in the higher oxidation state, in an aqueous medium wherein the aqueous medium comprises more than 25 wt % water to result in a halohydrocarbon and the metal halide in the lower oxidation state, wherein yield of the halohydrocarbon is more than 80% by weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method, comprising:
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contacting an anode with an anode electrolyte wherein the anode electrolyte comprises saltwater and copper halide; applying a voltage to the anode and cathode and oxidizing the copper halide from a lower oxidation state to a higher oxidation state at the anode wherein no gas is formed at the anode; contacting the cathode with a cathode electrolyte; and reacting ethylene with the anode electrolyte comprising the copper halide in the higher oxidation state, in an aqueous medium wherein the aqueous medium comprises more than 25 wt % water, to form ethylene dichloride wherein yield of the ethylene dichloride is more than 80% by weight. - View Dependent Claims (26)
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Specification