TERMIUM Plus^®

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A countercurrent method of washing pulp during the bleaching process in which the filtrate from the latter bleaching stages is used serially for showers of the earlier bleaching stages, skipping over the extraction stages. This is useful in bleach plants that do not use stainless steel washers on their extraction stage to prevent corrosion.  1, fiche 1, Anglais, - jump%20stage%20countercurrent%20washing

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Extraction stage: That stage in a multi-stage pulp bleaching operation ("E"-stage), usually following the chlorination stage, in which sodium hydroxide (NaOH) is used to remove water insoluble chlorinated lignin and other colored components not removed in an intermediate washing operation. Also referred to as the caustic stage or alkaline extraction stage.  1, fiche 1, Anglais, - jump%20stage%20countercurrent%20washing

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Record number: 2, Textual support number: 1 CONT

intelligent knowledge communication systems : active books that can interact with the reader to communicate knowledge at the appropriate level, selectively highlighting the interconnectedness and ramifications of items, recalling relevant information, probing understanding, explaining difficult areas in more depth, skipping over seemingly known material....  1, fiche 2, Anglais, - intelligent%20knowledge%20communication%20system

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