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:
Jan. 01, 2019
Filed:
Nov. 10, 2015
Synvina C. V., Amsterdam, NL;
Benjamin McKay, Amsterdam, NL;
Gerardus Johannes Maria Gruter, Amsterdam, NL;
Johannes Maria Franciscus Sijben, Amsterdam, NL;
Synvina C.V., Amsterdam, NL;
Abstract
An ester composition including at least 90% wt of the dialkyi ester of 2,5-furandicarboxylic acid as starting dialkyi ester concentration and up to 5% wt of the monoalkyi ester of 2,5-furandicarboxylic acid as starting monoalkyi ester concentration, the percentages being based on the weight of the ester composition, is purified in a process which includes subjecting the ester composition to melt crystallization to yield a purified dialkyi ester composition containing a dialkyi ester concentration higher than the starting dialkyi ester concentration and a melt residue containing a monoalkyi ester concentration higher than the starting monoalkyi ester concentration. From the melt residue a purified monoalkyi ester composition and a contaminants-rich residue can be prepared via melt crystallization. The purified dialkyi ester composition and/or the purified monoalkyi ester composition can be hydrolyzed to yield purified 2,5-furandicarboxylic acid.