Recovery of chemicals from pulp waste liquor

Details Recovery of chemicals from pulp waste liquor Recovery of chemicals from pulp waste liquor

D - Textiles, Paper

21

C

9/36.2

D21C 11/12 (2006.01) C10J 3/46 (2006.01) F23G 5/027 (2006.01) F23G 7/04 (2006.01)

Patent

CA 1222605

Abstract The invention relates to the recovery of chemicals from waste liquor from wood pulp process, primarily black liquor, while utilizing energy liberated. Controlled total vaporization of the pulp waste liquor at high temperature and low oxygen potential is achieved by the external supply of energy. During the subsequent condensation and separation a melt or water solution is obtained which, without causticizing, can be used for the preparation of white liquor, and also an energy rich gas and mainly free from sulphur, consisting primarily of carbon monoxide and hydrogen.

451526

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