US 12,344,715 B2
Feedstock engineering of polyester waste for recycling processes
Gregory Breyta, San Jose, CA (US); Robert David Allen, Golden, CO (US); and Nitin Shashikant Parekh, Los Altos, CA (US)
Assigned to TACLOV, LLC, Armonk, NY (US)
Filed by TACLOV, LLC, Armonk, NY (US)
Filed on Oct. 1, 2023, as Appl. No. 18/375,534.
Application 18/375,534 is a continuation of application No. 17/540,184, filed on Dec. 1, 2021, granted, now 11,807,725.
Claims priority of provisional application 63/120,364, filed on Dec. 2, 2020.
Prior Publication US 2024/0026115 A1, Jan. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. C08J 11/20 (2006.01)
CPC C08J 11/20 (2013.01) [C08J 2367/02 (2013.01)] 20 Claims
 
1. A method comprising:
reacting a waste material comprising a polyester with a dissolution solution comprising hexafluoroisopropyl alcohol and a chlorinated hydrocarbon and/or an aromatic hydrocarbon in a glass reactor, wherein the reaction forms a dissolved polyester product;
removing the dissolved polyester from the glass reactor and filtering the dissolved polyester to form a purified and dissolved polyester; and
treating the purified and dissolved polyester with a technique to produce a solid polyester product, wherein the dissolution solution is separated from the solid polyester product.