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. 30, 2025
Filed:
Jan. 15, 2025
Changzhou University, Jiangsu, CN;
CHANGZHOU UNIVERSITY, Changzhou, CN;
Abstract
Method for separating ethylene glycol (EG) and ethylene glycol diacetate (EGDA) with sulfolane entrainer, including: obtaining EG and a mixture of EGDA and sulfolane through separating a mixture of EG and EGDA under an action of sulfolane by an extractive distillation tower; obtaining EGDA and sulfolane through separating the mixture of the EGDA and the sulfolane by an entrainer recovery tower; and obtaining recycled sulfolane through cooling the sulfolane by a heat exchanger, and mixing the recycled sulfolane with fresh sulfolane and circulating into the extractive distillation tower for recycling. Through the method, a yield of the EG is greater than or equal to 99.50% and a mass purity of the EG is greater than or equal to 99.50%, and a yield of the EGDA is greater than or equal to 99.80% and a mass purity of the EGDA is greater than or equal to 99.90%.