Neutralizing with AQUAMAG®

NEUTRALIZATION OF SULFURIC ACID (H2SO4)

For one mole (98 lbs) of 100% Sulfuric Acid to be neutralized, the following chemical reactions occur:

AQUAMAG® Mg(OH)2 +
(58.3 lbs)		 H2SO4 ⇒
(98 lbs)		 MgSO4 +
(1203 lbs)		 2H2O
(36lbs)
Hydrated Lime Ca(OH)2 +
(74 lbs)		 H2SO4 ⇒
(74 lbs)		 CaSO4•2H2O ↓
(172 lbs)		 *
(36lbs)
Caustic Soda 2NaOH +
(58.3 lbs)		 H2SO4 ⇒
(80 lbs)		 Na2SO4 +
(142 lbs)		 2H2O
(36lbs)
Soda Ash Na2CO3 +
(106 lbs)		 H2SO4 ⇒
(98 lbs)		 Na2SO4 +
(142 lbs)		 2H2O
(36lbs) +		 H2O
(18 lbs)
Caustic Potash 2KOH +
(58.3 lbs)		 H2SO4 ⇒
(112 lbs)		 K2SO4 +
(174 lbs)		 2H2O
(36lbs)

These calculations show the amount of alkali needed to neutralize one ton of Sulfuric Acid and the resultant amount of salt formed:

Neutralizing Agent lbs Required to Neutralize One Ton H2SO4 Ratio to Mg(OH)2 Totla Dissolved Solids in Effluent (100% Basis) per Ton of Acid
Magox® MgO 822 0.69 2460
AQUAMAG® Mg(OH)2 1190 1.00 2460
Hydrated Lime Ca(OH)2 1510 1.27 3510*↓
Caustic Soda NaOH 1630 1.37 2900
Soda Ash Na2CO3 2160 1.82 2900
Caustic Potash KOH 2290 1.92 3550

* ↓ The CaSO4•2H2O will precipitate as sludge