PROCESS FOR OBTAINING TEREPHTHALIC ACID AND RECOVERING SODIUM HYDROXIDE FROM A SODIUM TEREPHTHALATE SOLUTION PRODUCED FROM REUSED POLYETHYLENE TEREPHTHALATE (PET)
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United States of America Patent
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Aug 15, 2024
app pub date -
Jun 9, 2021
filing date -
Jun 9, 2021
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Abstract
A process for obtaining terephthalic acid and recovering sodium hydroxide from a sodium terephthalate solution produced from reused PET, which includes the following steps: i) placing a sodium terephthalate solution obtained from a PET hydrolysis process on the anodic side; ii) placing an alcoholic medium on the cathodic side of the electrolytic cell; iii) applying an electric current that circulates through the anodic side and the cathodic side of the electrolytic cell and; iv) recovering terephthalic acid and sodium hydroxide. The method has been designed to not generate the by-products generated in the PET recycling process, and thus have a “green” process. Furthermore, the method described does not require large amounts of water or energy.
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