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. 02, 2025
Filed:
Dec. 07, 2023
SK Chemicals Co., Ltd., Seongnam-si, KR;
SK CHEMICALS CO., LTD., Seongnam-si, KR;
Abstract
A method for preparing a recycled raw material uses a waste copolyester. The method for preparing a recycled raw material includes (1) depolymerizing a waste copolyester to obtain a first reactant; (2) removing impurities present in the first reactant to obtain a second reactant; (3) distilling the second reactant to obtain a third reactant containing crude recycled bis-2-hydroxyethyl terephthalate and a fourth reactant containing a recycled diol-ester; and (4) mixing the third reactant with an aqueous solvent and recrystallizing it to obtain a fifth reactant containing recycled bis-2-hydroxyethyl terephthalate and a filtrate.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile