METHOD FOR PRODUCING A MONOMER FROM THE POLYMER COMPRISING THE MONOMER

Abstract

The present invention relates to a method for producing a carboxylic acid from a hydrolyzable polymer containing the carboxylic acid, the method comprising at least the following method steps: i) depolymerizing the polymer by hydrolyzing the polymer in an aqueous hydrolysis solution, such that a carboxylate and possibly at least one additional monomeric component of the polymer are formed; ii) if necessary, separating additional monomeric components which are present in the hydrolysate solution produced in method step i) and possibly present additional soluble and/or insoluble impurities; iii) transferring the hydrolysate solution produced in method step ii) into an anode chamber of an electrolysis device; iv) performing an electrolysis with the hydrolysate solution in the anode chamber, the electrolysis device comprising, in addition to the anode chamber, a cathode chamber filled with a liquid, by connecting the electrolysis device to a voltage source, wherein current flows through the electrolysis device and ion exchange occurs between the liquids in the anode chamber and cathode chamber, such that the liquid in the cathode chamber becomes alkaline and protons which protonate the carboxylate are produced in the anode chamber, resulting in precipitation of the carboxylic acid; and v) separating the formed carboxylic acid from at least part of the hydrolysate solution, wherein vi) liquid arising in the cathode chamber of the electrolysis device in method step iv) is used as a component of the hydrolysis solution in step i).

Inventors 10

1. Marcel Gausmann Aachen author as filed: Gausmann, Marcel
2. William Graf von Westarp Aachen author as filed: Graf von Westarp, William
3. Jonas Görtz Aachen author as filed: Görtz, Jonas
4. Andreas Jupke Aachen author as filed: Jupke, Andreas
5. Amrei Becker Aachen author as filed: Becker, Amrei
6. Thomas Gries Aachen author as filed: Gries, Thomas
7. Graf, von Westarp William
8. von Westap, Willem Graf
9. Zupke, Andreas
10. Becker, Amre

Inventors are linked to an Aachen author when surname and first name match exactly one author.

Applicants

• RHEINISCH-WESTFÄLISCHE TECHNISCHE HOCHSCHULE (RWTH) AACHEN RWTH Aachen University
• 亚琛工业大学

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Cited patents 10