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:
Jul. 07, 2026
Filed:
Aug. 09, 2021
Auriga Polymers, Inc., Charlotte, NC (US);
Michael Kowalske, Spartanburg, SC (US);
Jason Smith, Boiling Springs, SC (US);
Miguel Osornio, Spartanburg, SC (US);
Matthiew Filanova, Greer, SC (US);
Auriga Polymers, Inc., Charlotte, NC (US);
Abstract
A process for purifying polyester-grade ethylene glycol from crude ethylene glycol containing at least a first component and a second component that have a boiling point below that of ethylene glycol that includes (a) providing a stream of crude ethylene glycol by depolymerizing polyethylene terephthalate in a chemical recycling process; (b) introducing the crude ethylene glycol stream into a first distillation column for distilling the first component and removing the first component from the process; (c) withdrawing a first stream from the lower portion of the first distillation column and feeding the first stream into a second distillation column for distilling the second component and removing the second component from the process; (d) withdrawing a second stream from the lower portion of the second distillation column and feeding the second stream into a third distillation column; and (e) recovering polyester-grade ethylene glycol from the third distillation column.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile