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BLANQUEO PASTA PAPEL [1 record]
Record 1 - internal organization data 2009-02-16
Record 1, English
Record 1, Subject field(s)
- Pulp Preparation (papermaking)
Record 1, Main entry term, English
- chlorination
1, record 1, English, chlorination
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- chlorination stage 2, record 1, English, chlorination%20stage
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
The first stage of most bleaching sequences, in which the chlorine and lignin react to form orange-coloured chlorolignins which are partly water-soluble in the washing step and readily alkali-soluble in the next extraction stage. 2, record 1, English, - chlorination
Record number: 1, Textual support number: 1 CONT
The chlorination stage may be considered an extension of pulping in that it continues the delignification process which makes it possible to brighten the pulp by oxidation in the third and subsequent stages. Chlorination is most commonly done in upflow towers at about 3% consistency, and at temperatures from 20° to 60°C for a 10 - 60 min. reaction time. 2, record 1, English, - chlorination
Record 1, French
Record 1, Domaine(s)
- Préparation de la pâte à papier
Record 1, Main entry term, French
- chloration
1, record 1, French, chloration
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Premier stade de certaines séquences de blanchiment, au cours duquel le chlore et la lignine réagissent pour former des chlorolignines orangées, partiellement hydrosolubles à l'étape du lavage et facilement solubles lors du stade suivant d'extraction en milieu alcalin. 2, record 1, French, - chloration
Record number: 1, Textual support number: 1 CONT
Le stade de chloration complète en quelque sorte le défibrage de la pâte, puisqu'il en poursuit la délignification et en permet l'éclaircissement par oxydation au cours du troisième stade et des suivants. La chloration s'effectue habituellement dans des tours à courant ascendant à une concentration d'environ 3 %, à des températures allant de 20 à 60 °C et durant un temps de réaction de 10 à 60 minutes. 2, record 1, French, - chloration
Record number: 1, Textual support number: 1 OBS
On trouvera dans le «Cours de formation papetière» de Jean Vilars (code : VIPAP) le terme «chloration» sous l'article 3.6.2.1. 3, record 1, French, - chloration
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Preparación de la pasta (fabricación de papel)
Record 1, Main entry term, Spanish
- cloración
1, record 1, Spanish, cloraci%C3%B3n
correct, feminine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
Record number: 1, Textual support number: 1 CONT
La fabricación de pastas de papel mediante tecnologías menos contaminantes, y en especial el blanqueo [...] con peróxido de hidrógeno, ha traído [...] nuevos problemas a las fábricas de pasta de papel [...] Una parte de los problemas que han surgido con la introducción de estos reactivos está relacionada con la blancura de las pastas, porque de momento ni el oxígeno ni la combinación de oxígeno y peróxido pueden igualar la eficacia de la cloración para la eliminación de los productos(derivados de la lignina) responsables del color en las pastas alcalinas. 2, record 1, Spanish, - cloraci%C3%B3n
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