Media recycling and sanitization
Polyester-free magnetic and/or metallic components are obtained from a multicomponent polyester device by reacting the multicomponent polyester device with an amine organocatalyst and/or carboxylic acid salt of same and an alcohol solvent. The reaction recovers (i) the polyester-free magnetic and/or metallic components as solid inert by-products of the reaction, (ii) the amine organocatalyst and/or carboxylic acid salt of same for reuse, (iii) unreacted alcohol for reuse, and (iv) a polyester monomer product. Where the multicomponent device includes a non-polyester material, such as polystyrene, the polystyrene is fully recovered from the reaction. Where the multicomponent polyester device includes recording media, the reaction process sanitizes the inert byproducts of the recording media, thus scrubbing any personal data from the reacted recording media.
1. A method comprising:
placing a multicomponent device comprising a polyester component and a magnetic and/or metallic component into a reaction vessel of a pressure reactor with an alcohol solvent and amine organocatalyst and/or carboxylic salt of same;
heating the reaction vessel to run a depolymerization reaction within the pressure reactor;
recovering from the reaction vessel (i) the magnetic and/or metallic component as a polyester-free solid inert by-product of the depolymerization reaction, (ii) the amine organocatalyst or carboxylic salt of same for reuse, and (iii) unreacted alcohol solvent for reuse, and (iv) a polyester monomer product.
2. The method of claim 1 , wherein the pressure reactor is an autoclave.
3. The method of claim 1 , wherein the pressure reactor is an extrusion reactor.
4. The method of claim 1 , wherein a magnetic is dropped into the reaction vessel after heating in order to recover the magnetic and/or metallic component.
5. The method of claim 1 , wherein the method is run in batches.
6. The method of claim 1 , wherein the method is run as a continuous flow process.
7. The method of claim 1 , wherein the alcohol solvent is a glycol and/or a diol.
8. The method of claim 1 , wherein the amine organocatalyst and/or carboxylic salt of same is a tertiary amine.
9. A method comprising:
placing a multicomponent device comprising a polyethylene terephthalate (PET) component, a polystyrene component, and a magnetic and/or metallic component into a reaction vessel of a pressure reactor with an alcohol solvent and amine organocatalyst and/or carboxylic salt of same;
heating the reaction vessel to run a depolymerization reaction within the pressure reactor;
recovering from the reaction vessel (i) the magnetic and/or metallic component as a polyester-free solid inert by-product of the depolymerization reaction, (ii) the amine organocatalyst or carboxylic salt of same for reuse, and (iii) unreacted alcohol solvent for reuse, and (iv) bis(2-hydroxyethyl) terephthalate) (BHET), and (v) the polystyrene component.
10. The method of claim 9 , wherein the pressure reactor is an autoclave.
11. The method of claim 9 , wherein the pressure reactor is an extrusion reactor.
12. The method of claim 9 , wherein a magnetic is dropped into the reaction vessel after heating in order to recover the magnetic and/or metallic component.
13. The method of claim 9 , wherein the method is run in batches or as a continuous flow process.
14. The method of claim 9 , wherein the alcohol solvent is a glycol and/or a diol and the amine organocatalyst and/or carboxylic salt of same is a tertiary amine.
15. A method comprising:
placing a multicomponent device comprising a polyethylene naphthalate (PEN) component, a polystyrene component, and a magnetic and/or metallic component into a reaction vessel of a pressure reactor with an alcohol solvent and amine organocatalyst and/or carboxylic salt of same;
heating the reaction vessel to run a depolymerization reaction within the pressure reactor;
recovering from the reaction vessel (i) the magnetic and/or metallic component as a polyester-free solid inert by-product of the depolymerization reaction, (ii) the amine organocatalyst or carboxylic salt of same for reuse, and (iii) unreacted alcohol solvent for reuse, and (iv) bis(2-hydroxyethyl) naphthalate (BHEN), and (v) the polystyrene component.
16. The method of claim 15 , wherein the pressure reactor is an autoclave.
17. The method of claim 15 , wherein the pressure reactor is an extrusion reactor.
18. The method of claim 15 , wherein a magnetic is dropped into the reaction vessel after heating in order to recover the magnetic and/or metallic component.
19. The method of claim 15 , wherein the method is run in batches or as a continuous flow process.
20. The method of claim 15 , wherein the alcohol solvent is a glycol and/or a diol and the amine organocatalyst and/or carboxylic salt of same is a tertiary amine.