Integrated process for producing carboxylic acids from carbon dioxide
First Claim
1. A method for producing oxalic acid comprising:
- receiving an anolyte feed including a hydrogen halide and at least one of a alkane, haloalkane, alkene, haloalkene, aromatic compound, haloaromatic compound, heteroaromatic compound or halo-heteroaromatic compound at an anolyte region of an electrochemical cell including an anode;
receiving a catholyte feed including carbon dioxide and an alkali metal hydroxide at a catholyte region of the electrochemical cell including a cathode;
applying an electrical potential between the anode and the cathode sufficient to reduce the carbon dioxide to at least one reduction product and an anolyte product;
converting the at least one reduction product and the alkali metal hydroxide to an alkali metal oxalate via at least one thermal reactor;
receiving the alkali metal oxalate at an electrochemical acidification electrolyzer; and
converting the alkali metal oxalate to oxalic acid at an electrochemical acidification electrolyzer while co-generating an alkali metal hydroxide and a halogen.
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Abstract
The present disclosure is a method and system for production of carboxylic based chemicals, including carboxylic acids and salts. A method for producing at oxalic acid may include receiving an anolyte feed at an anolyte region of an electrochemical cell including an anode and receiving a catholyte feed including carbon dioxide and an alkali metal hydroxide at a catholyte region of the electrochemical cell including a cathode. Method may include applying an electrical potential between the anode and cathode sufficient to reduce the carbon dioxide to at least one reduction product and converting the at least one reduction product and the alkali metal hydroxide to an alkali metal oxalate via a thermal reactor. The method may further include receiving the alkali metal oxalate at an electrochemical acidification electrolyzer and converting the alkali metal oxalate to oxalic acid at the electrochemical acidification electrolyzer.
186 Citations
18 Claims
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1. A method for producing oxalic acid comprising:
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receiving an anolyte feed including a hydrogen halide and at least one of a alkane, haloalkane, alkene, haloalkene, aromatic compound, haloaromatic compound, heteroaromatic compound or halo-heteroaromatic compound at an anolyte region of an electrochemical cell including an anode; receiving a catholyte feed including carbon dioxide and an alkali metal hydroxide at a catholyte region of the electrochemical cell including a cathode; applying an electrical potential between the anode and the cathode sufficient to reduce the carbon dioxide to at least one reduction product and an anolyte product; converting the at least one reduction product and the alkali metal hydroxide to an alkali metal oxalate via at least one thermal reactor; receiving the alkali metal oxalate at an electrochemical acidification electrolyzer; and converting the alkali metal oxalate to oxalic acid at an electrochemical acidification electrolyzer while co-generating an alkali metal hydroxide and a halogen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for producing oxalic acid comprising:
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receiving an anolyte feed including a hydrogen halide and at least one of a alkane, haloalkane, alkene, haloalkene, aromatic compound, haloaromatic compound, heteroaromatic compound or halo-heteroaromatic compound at an anolyte region of an electrochemical cell including an anode; receiving a catholyte feed including carbon dioxide and potassium hydroxide at a catholyte region of the electrochemical cell including a cathode; applying an electrical potential between the anode and the cathode sufficient to reduce the carbon dioxide to carbon monoxide and an anolyte product; converting the carbon monoxide and the potassium hydroxide to a potassium formate via a first thermal reactor; converting the potassium formate to potassium oxalate via a second thermal reactor; receiving the potassium oxalate at an electrochemical acidification electrolyzer; and converting the potassium oxalate to oxalic acid at an electrochemical acidification electrolyzer. - View Dependent Claims (15, 16, 17, 18)
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Specification