The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 2024
Filed:
Jun. 21, 2022
Premirr Plastics Inc., Chapel Hill, NC (US);
Matthew Craig Parrott, Chapel Hill, NC (US);
James Christopher Luft, Chapel Hill, NC (US);
Donald B. Shuping, Pittsboro, NC (US);
Michael Dean Mattiace, Chapel Hill, NC (US);
Premirr Plastics Inc., Chapel Hill, NC (US);
Abstract
A process and a system for depolymerizing plastic, such as waste polyester, into marketable monomers. A heterogeneous mixture of plastic particles, a solvent, and a catalyst are pumped continuously through a heating zone at a flow rate just high enough to maintain a particle speed great enough to keep the plastic particles in suspension. The temperature of the heterogeneous mixture is raised in the heating zone and maintained in a hold zone to complete depolymerization of the mixture into a homogeneous solution containing a liquefied plastic monomer. The homogeneous solution is cooled to solidify and precipitate the monomer. The precipitated monomer is separated from the solvent to be recycled. The solvent is recirculated to be reused as a constituent of the heterogeneous mixture.