Deinking a cellulosic substrate using magnesium silicate

D - Textiles – Paper – 21 – C

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

Patent

CA 2728401

The present invention provides for a composition comprising: a) activated magnesium silicate; b) optionally a suspending agent for said activated magnesium silicate; c) water,- d) optionally an emulsifier,- e) optionally excluding caustic soda; and f) optionally excluding hydrogen peroxide. The present invention also provides for a composition comprising: a) magnesium silicate; b) a suspending agent for said magnesium silicate; c) water; d) optionally an emulsifier; e) optionally excluding caustic soda; and f) optionally excluding hydrogen peroxide. The present invention also provides a method for deinking a cellulosic substrate, using the composition described here above.

L'invention concerne une composition qui comprend : a) du silicate de magnésium activé; b) éventuellement un agent de suspension pour ledit silicate de magnésium activé; c) de l'eau; d) éventuellement un émulsifiant; e) éventuellement pas de soude caustique; et f) éventuellement pas de peroxyde d'hydrogène. La présente invention concerne également une composition qui comprend : a) du silicate de magnésium; b) un agent de suspension pour ledit silicate de magnésium; c) de l'eau; d) éventuellement un émulsifiant; e) éventuellement pas de soude caustique; et f ) éventuellement pas de peroxyde d'hydrogène. La présente invention concerne également un procédé de désencrage d'un substrat cellulosique au moyen de ladite composition.

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