Black liquor

What is Black liquor?

Black liquor meaning A by product of the paper production process, alkaline spent liquor, that can be used as a source of energy. Alkaline spent liquor is removed from the digesters in the process of chemically pulping wood. After evaporation, the residual “black” liquor is burned as a fuel in a recovery furnace that permits the recovery of certain basic chemicals.


reference: Glossary – U.S. Energy Information Administration (EIA)

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