Process for increasing the solids content of black liquor at its

Details Process for increasing the solids content of black liquor at its Process for increasing the solids content of black liquor at its

1986-06-06

1989-08-15

Chin, Peter

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162 46, 162 47, 162 49, 162 61, 423DIG3, 159 21, 159 473, D21C 1112

Patent

active

048571466

ABSTRACT:
The invention relates to a process of increasing the solids content of black liquor at its recovery in a sulfate pulping process. According to the invention, the liquor is first heated at a pressure which is so high that no boiling occurs at the heating temperature, after which the liquor is led to a tank where its pressure is released to a value below the saturation pressure of steam at the relative temperature of the liquor such that water is evaporated. The liquor thus concentrated can be led to the liquor combustion in the recovery process.

REFERENCES:
patent: 3432402 (1969-03-01), Herrlinger et al.

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