D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 21/02 (2006.01) D21C 9/08 (2006.01)
Patent
CA 2579510
Enhanced removal and/or control of adhesives or sticky materials, "stickies", from recovered paper stock or virgin pulp fibers is achieved using a combination of enzyme treatment with adsorbents and/or absorbents. Pulp stock to be treated is typically obtained from old magazines, newspapers, household waste, but may include corrugated boxes and office waste. Virgin pulps may include mechanical, chemical, or semi-chemical pulps. Enzymes typically include hydrolases such as cellulases, hemicellulases, pectinases, amylases, and lipases such as esterases, lyases such as pectate lyases, and oxidoreductases. Adsorbents include activated bentonite, microparticles, talc, clay and modified silica. Absorbents typically include water soluble polymers, dispersants, coagulatants and agglomerants.
L'invention concerne l'enlèvement amélioré et/ou la lutte contre des adhésifs ou des matières collantes de papier d'impression ou de fibres de pâte à papier vierge, que l'on réalise au moyen d'une combinaison de traitement d'enzymes par des adsorbants et/ou des absorbants. La pâte à traiter provient d'ordinaire de vieux magazines, journaux, déchets ménagers, mais peut comporter des boîtes en carton ondulé et des déchets de bureau. Les pâtes à papier vierges peuvent comporter des pâtes mécaniques, chimiques ou semi-chimiques. Les enzymes sont d'ordinaire des hydrolases, notamment des cellulases, des hémicellulases, des pectinases, des amylases et des lipases telles que des estérases, des lyases telles que des pectate lyases et des oxydoréductases. Les adsorbants sont notamment de la bentonite activée, des microparticules, du talc, de l'argile et de la silice modifiée. Les absorbants sont notamment des polymères hydrosolubles, des dispersants, des coagulants et des agglomérats.
Ma Jianhua
Tausche James G.
Wang Xiang
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Enzymatic Deinking Technologies Llc
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