Method for improved turpentine recovery from modern cooking...

Details Method for improved turpentine recovery from modern cooking... Method for improved turpentine recovery from modern cooking...

D - Textiles, Paper

21

C

D21C 11/06 (2006.01) D21C 11/00 (2006.01)

Patent

CA 2392908

A method for the preparation of pulp by means of alkaline cooking, in which method spent liquor is transferred to pressurized tanks, and at least one liquor is expanded corresponding to a temperature difference of 1 to 5 C. The generated steam is led to turpentine recovery. Thus, the removal of turpentine and gases dissolved in said liquor is effective, the amount of recovered turpentine increases, and pulp of better washability and higher quality is obtained.

L'invention concerne un procédé de préparation de pâte au moyen d'un étuvage alcalin, le procédé consistant à transférer la liqueur épuisée vers des réservoirs sous pression, et à dilater au moins une liqueur selon un écart de température de 1 à 5 DEG C. La vapeur produite est acheminée à une unité de récupération de la thérébentine. Ainsi, l'élimination de la thérébentine et des gaz dissous dans ladite liqueur est efficace, la quantité de thérébentine récupérée est plus importante et une pâte présentant une lavabilité accrue et une meilleure qualité est obtenue.

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