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:
Nov. 10, 2015
Filed:
Dec. 28, 2012
E I Du Pont DE Nemours and Company, Wilmington, DE (US);
David Richard Corbin, West Chester, PA (US);
Paul Joseph Fagan, Wilmington, DE (US);
Ronnie Ozer, Arden, DE (US);
Bhuma Rajagopalan, Wilmington, DE (US);
Eric J. Till, Newtown Square, PA (US);
E I DU PONT DE NEMOURS AND COMPANY, Wilmington, DE (US);
Abstract
Furfural is produced by mixing an aqueous feedstock solution containing Csugar and/or Csugar with a heated high boiling, water-miscible solvent, such as sulfolane, and a solid acid catalyst. Furfural product and water can be distilled off, leaving non-volatile solvent behind. Furfural yields of over 70% at as high as 99% conversion have been obtained with this process with sulfolane as the reaction solvent and zeolite beta as the solid acid catalyst. Also, certain by-products (e.g., humins) solubilized in the reaction solvent can be precipitated by addition of water or aqueous feedstock solution and then removed by filtration, thereby providing a convenient and effective way of removing these undesirable byproducts from the reaction mixture.