The major constituent of black liquor generated during paper manufacture is sodium___________________?
Correct answer: C. Carbonate
- A. Sulphate
- B. Hydroxide
- C. Carbonate
- D. Bi-carbonate
Explanation
In the Kraft process, black liquor contains spent inorganic cooking chemicals and dissolved organic matter, with sodium carbonate as a major sodium salt. Sodium hydroxide is consumed during cooking, so it is not usually identified as the major constituent.
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