Method for recovering chemicals from spent pulp liquors

Details Method for recovering chemicals from spent pulp liquors Method for recovering chemicals from spent pulp liquors

D - Textiles, Paper

21

C

9/36.3

D21C 11/00 (2006.01) D21C 11/04 (2006.01) D21C 11/12 (2006.01) D21C 11/14 (2006.01)

Patent

CA 1324865

A b s t r a c t In order to recover chemicals from spent pulp liquors while at the same time making use of energy liberated in the process, the spent liquors are supplied to the reaction zone of a reactor while external thermal energy independent of the combustion, is simultaneously supplied, for instance, in the form of an energy-rich gas heated in a plasma generator, the temperature and oxygen potential in the zone being governed independently of each other by the controlled supply of said thermal energy, and possibly also the supply of carbonaceous material and/or gas containing oxygen, so that substantially all alkali and sulphur, i.e. 95 to 100% thereof, is bound in a molten phase which is separated from the gas phase and withdrawn via an outlet connected to the reactor, the organic portion of the spent liquor being withdrawn in the form of a gas.

567585

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