Patent ID: 9447541
Filing Date: 2016-09-20
CPC Classification: B01D,C02F,D21C,D21H

Claim Text:
1. A process for purifying by salt/ion depletion or free sugar depletion a slurry comprising microfibrillated cellulose, wherein the process comprises the following steps: a) providing a slurry comprising at least 20% microfibrillated cellulose by solids weight and a liquid, b) subjecting the slurry to a first application of an electric field inducing the liquid of the slurry to flow, c) separating the liquid from the microfibrillated cellulose thus obtaining a liquid depleted slurry, d) adding a washing liquid to the liquid depleted slurry, e) subjecting the liquid depleted slurry to a second application of an electric field inducing the washing liquid of the slurry to flow and f) separating the washing liquid from the microfibrillated cellulose, thus obtaining a purified microfibrillated cellulose.