black liquor

black liquor
2. : the dark-colored alkaline waste liquor which comes from the sulfate and soda processes of making cellulosic pulp and from which tall oil and lignin are recovered — compare black ash II 2

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(in making wood pulp for paper) the liquor that remains after digestion. Cf. white liquor.

* * *

black liquor,
the leftover liquid from wood chips treated by the sulfite process.

Useful english dictionary. 2012.

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