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. 20, 2016
Filed:
May. 11, 2012
Isto Heiskanen, Imatra, FI;
Kaj Backfolk, Lappeenranta, FI;
Ari Kotilainen, Joensuu, FI;
Valentas Gaidelis, Vilnius, LT;
Jonas Sidaravicius, Vilnius, LT;
Isto Heiskanen, Imatra, FI;
Kaj Backfolk, Lappeenranta, FI;
Ari Kotilainen, Joensuu, FI;
Valentas Gaidelis, Vilnius, LT;
Jonas Sidaravicius, Vilnius, LT;
Stora Enso OYJ, Helsinki, FI;
Abstract
The present invention relates to a process for purifying a slurry comprising cellulose, such as microfibrillated cellulose, wherein the process comprises the following steps: —providing a slurry comprising cellulose and liquid, —subjecting the slurry to an electric field inducing the liquid of the slurry to flow, —separating the liquid from the cellulose thus obtaining a liquid depleted slurry, —adding a washing liquid, such as an organic solvent, to the liquid depleted slurry—subjecting the liquid depleted slurry to an electric field inducing the washing liquid of the slurry to flow and—separating the washing liquid from the cellulose, thus obtaining a purified cellulose. The invention also relates to cellulose such as microfibrillated cellulose obtainable from said process.