TERMIUM Plus®

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oxidative bleaching agent [1 record]

Record 1 2003-08-22

English

Subject field(s)
  • Pulp Preparation (papermaking)
DEF

Bleaching chemicals which act by oxidizing the lignin. The relative rates of reaction with lignin and carbohydrates are different, and minimum damage to the pulp is achieved by maintaining optimum conditions.

CONT

Oxidizing agents used in bleaching are chlorine dioxide, chlorite or chlorous acid, hypochlorite, peroxide, oxygen, ozone.

French

Domaine(s)
  • Préparation de la pâte à papier
DEF

Agents qui développent la blancheur des pâtes en oxydant la lignine. Le fait que les vitesses relatives de réaction avec la lignine et les hydrates de carbone soient différentes, et le maintien de conditions optimales assure une détérioration minimale de la pâte.

CONT

Les agents oxydants utilisés pour le blanchiment sont le bioxyde de chlore, l'acide chlorite ou hypochloreux, l'hypochlorite, le peroxyde d'hydrogène, l'oxygène, l'ozone.

OBS

Dans le «Cours de formation papetière» de Jean Vilars, on trouvera le terme «oxydant» sous l'article 3.5.1.2.

Spanish

Campo(s) temático(s)
  • Preparación de la pasta (fabricación de papel)
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