sodium hydroxide in paper industry

caustic soda flakes and lye

Description

Sodium hydroxide is formed from sodium sulfate by a three step operation comprising converting the sodium sulfate to sodium sulfide, converting the sodium sulfide to sodium bicarbonate, and converting the sodium bicarbonate to sodium hydroxide. The operations preferably are effected in conjunction with a bleached craft pulp mill operation, so as to utilize by-product sodium sulfate from chlorine dioxide generation to produce useful sodium hydroxide as sulfur without co-producing chlorine.

Abrasives, chemical
  • caustic soda
  • sodium hydroxide
  • lye
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