Sodium sulfate

Made by

Used by

• Bleached softwood kraft pulp with chemical recovery (1000 ADt/d market pulp, concept)FeedstockConcept · not reviewed

Takes part in

• 2NaHCO₃+H₂SO₄→givesNa₂SO₄+2CO₂+2H₂OProduct · Neutralisation of the brine alkalinity by the acid (R-101) · one process
• CaSO₄+Na₂CO₃→givesCaCO₃+Na₂SO₄Product · Calcium removal with soda ash · one process
• Na₂SO₃+Cl₂+2NaOH→givesNa₂SO₄+2NaCl+H₂OProduct · Chemical dechlorination with sulfite in alkaline brine · 2 processes
• H₂SO₄+2NaOH→givesNa₂SO₄+2H₂OProduct · Neutralisation of the sulfuric acid of the spent brine (R-401) · 3 processes
• Na₂S+2O₂→givesNa₂SO₄Product · Oxidation of the sulfide of the white liquor alkali to sulfate · one process
• Na₂SO₄→givesNa₂S+2O₂Reactant · Sulfate reduction in the char bed (formal net reaction; the reductant is the char carbon of the combustion reactions) · one process