Deinking a cellulosic substrate using magnesium hydroxide

Details Deinking a cellulosic substrate using magnesium hydroxide Deinking a cellulosic substrate using magnesium hydroxide

D - Textiles, Paper

21

C

D21C 5/00 (2006.01) D21C 5/02 (2006.01)

Patent

CA 2728650

The present invention provides for a composition for deinking a cellulosic substrate comprising: (a) activated magnesium hydroxide; (b) optionally a suspending agent for said activated magnesium hydroxide; (c) water; (d) optionally an emulsifier; (e) optionally excluding caustic soda; and (f) optionally excluding hydrogen peroxide. A method for deinking cellulosic substrates using said composition is also claimed.

Cette invention concerne une composition de désencrage dun substrat cellulosique comprenant : (a) de lhydroxyde de magnésium activé; (b) optionnellement un agent suspenseur pour ledit hydroxyde de magnésium activé; (c) de leau; (d) optionnellement un émulsifiant; (e) optionnellement à lexclusion de lhydroxyde de sodium; et (f) optionnellement à lexclusion du peroxyde dhydrogène. Cette invention concerne aussi un procédé de désencrage de substrats cellulosiques au moyen de ladite composition.

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