Recovering chemicals from spent pulp liquors
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United States of America Patent
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-
Dec 1, 1987
Grant Date -
N/A
app pub date -
Jan 27, 1986
filing date -
Mar 26, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a method and means of increasing capacity and improving the chemical recovery process when using a conventional soda recovery boiler for recovering chemicals out of spent sulphate liquors. The spent sulphate liquor is supplied in full or in part to a liquor gasifier (8) while external energy independent of combustion is simultaneously supplied (at 16, 17). The temperature and oxygen potential are carefully controlled independently of each other by means of controlled supply of the energy. The product thus obtained is thereafter introduced in full or in part into a soda recovery boiler (1).
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