US 2025/0084540 A1 · METHOD FOR PREPARING GLYCOLLATE BY ELECTRO-CATALYZING ETHYLENE GLYCOL OR ELECTRO-CATALYTICALLY REFORMING WASTE PLASTIC POLYETHYLENE TEREPHTHALATE (PET)

Abstract

The present invention discloses a method for preparing glycollate by electro-catalyzing ethylene glycol or electro-catalytically reforming waste plastic polyethylene terephthalate (PET). The method for preparing glycollate by electro-catalytically reforming waste plastic PET includes: 1) dissolving the waste plastic PET into an alkali liquid, and carrying out solid-liquid separation after hydrolysis reaction to obtain an alkaline electrolyte containing ethylene glycol; and 2) assembling an anode catalyst, a cathode catalyst and the alkaline electrolyte containing the ethylene glycol into an electrolytic cell, and applying voltage for electrocatalytic reaction, where the ethylene glycol is oxidized at an anode to generate glycollate, and water is reduced at a cathode to generate hydrogen. The present invention firstly provides conversion of the waste plastic PET into the glycollate by means of an electrocatalysis technology in the art, and the method not only utilizes resources and energy of the waste plastic PET, but also provides a new idea for low-cost and large-scale production of glycolic acid.

Claims10

Dependent claims

A method for preparing glycollate by electro-catalyzing ethylene glycol, comprising:

assembling an anode catalyst, a cathode catalyst and an alkaline electrolyte containing the ethylene glycol into an electrolytic cell, and applying voltage for electrocatalytic reaction, wherein the ethylene glycol is oxidized at an anode to generate the glycollate, and water is reduced at a cathode to generate hydrogen;
the anode catalyst is selected from at least one of palladium-supported foam metal, palladium alloy-supported foam metal, platinum-supported foam metal, and platinum alloy-supported foam metal;
and
the cathode catalyst is foam metal and/or a supported catalyst;
and the supported catalyst is selected from at least one of platinum-supported foam metal, platinum alloy-supported foam metal, nickel phosphide-supported foam metal, and cobalt phosphide-supported foam metal.

2 more elements

A method for preparing glycollate by electro-catalytically reforming waste plastic polyethylene terephthalate (PET), comprising:

1) dissolving the waste plastic PET into an alkali liquid, and carrying out solid-liquid separation after hydrolysis reaction to obtain an alkaline electrolyte containing ethylene glycol;
and
2) assembling an anode catalyst, a cathode catalyst and the alkaline electrolyte containing the ethylene glycol into an electrolytic cell, and applying voltage for electrocatalytic reaction, wherein the ethylene glycol is oxidized at an anode to generate glycollate, and water is reduced at a cathode to generate hydrogen;
the anode catalyst is selected from at least one of palladium-supported foam metal, palladium alloy-supported foam metal, platinum-supported foam metal, and platinum alloy-supported foam metal;
and
the cathode catalyst is foam metal and/or a supported catalyst;
and the supported catalyst is selected from at least one of platinum-supported foam metal, platinum alloy-supported foam metal, nickel phosphide-supported foam metal, and cobalt phosphide-supported foam metal.

4 more elements

Dependencies are inferred from the claim text.

Method for preparing glycollate by electro-catalyzing ethylene glycol or electro-catalytically reforming waste plastic polyethylene terephthalate (pet)

Life of this patent

Method for preparing glycollate by electro-catalyzing ethylene glycol or electro-catalytically reforming waste plastic polyethylene terephthalate (pet)

Life of this patent

Abstract

Claims10