C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/52 (2006.01) C02F 1/54 (2006.01) C02F 1/56 (2006.01)
Patent
CA 2127687
-25- ABSTRACT A method is described for improving the removal of toxic resin acids and fatty acids from pulp and paper effluent and from other streams containing resins and fatty acids. The addition of an anionic material, such as albumin, gelatin, alginate or alginic acid prior to clarification with conventional or state of the art cationic coagulation clarification or retentionwill improve the removal of resin acids and fatty acids.
Le procédé décrit permet d'améliorer l'élimination des acides résiniques toxiques et des acides gras contenus dans les effluents et autres eaux résiduaires issus de la fabrication des papiers et pâtes à papier. En effet, avant clarification, l'adjonction d'une matière anionique (albumine, gélatine, alginate ou acide alginique), améliore l'élimination des acides résiniques toxiques et des acides gras, et ce, que l'on ait recours aux techniques de clarification classiques, à la technique plus récente de clarification par coagulation cationique, ou encore simplement à la technique de la rétention.
B.g. Roberts Chemicals Inc.
Gowling Lafleur Henderson Llp
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