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:
Sep. 15, 2026
Filed:
Feb. 24, 2022
Chempet S.r.l., Cerano, IT;
Chempet S.r.I, Cerano, IT;
Abstract
Described in a process for producing bis(2-hydroxyethyl) terephthalate (BHET) in liquid form by depolymerization of polyethylene terephthalate (PET), wherein BHET obtained from depolymerization by glycolysis with monoethylene glycol (MEG) is purified and subsequently crystallized by cooling to obtain BHET in crystalline form impregnated with a solvent. The BHET is then melted down to obtain a solution of BHET in the solvent. The solvent content in the resulting BHET solution is adjusted, if necessary, to a value such that the BHET is in a liquid form at a temperature of less than or equal to 90° C. and greater than or equal to 70° C. This provides a BHET in liquid form that is stable for a long time within the above temperature range, which can be stored, transported, and fed to the polycondensation reactor for PET production.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile