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:
Jul. 07, 2020
Filed:
Jun. 26, 2019
Gfbiochemicals Ip Assets B.v., Geleen, NL;
Aris De Rijke, Geleen, NL;
Rudy Francois Maria Jozef Parton, Geleen, NL;
Donato Santoro, Valletta, MT;
GFBIOCHEMICALS IP ASSETS B.V., Geleen, NL;
Abstract
A process for the isolation of levulinic acid obtained by acid catalyzed hydrolysis of a C6-carbohydrate-containing feedstock, including the following steps: a) providing a solutioncomprising at least 5 wt. % of levulinic acid, at least 0.1 wt. % of formic acid and at most 94.9 wt. % of solvent, relative to the total weight of solutionb) feeding solutionto a first evaporation step to treat solutionand to obtain solutioncomprising at least 25 wt. % of levulinic acid, less than 20 wt. % of solvent and at least 1 wt. % of formic acid, relative to the total weight of solution, c) feeding solutionto a second evaporation step to treat solutionand to obtain solutioncomprising at least 30 wt. % of levulinic acid and less than 1.0 wt. % of formic acid, relative to the total weight of solutiond) feeding solutionto a third evaporation step to treat solutionand to obtain levulinic acid with a purity of at least 90 wt. % and containing less than 1000 wppm angelica lactone.