Technology for the Production of Sulphate of Potash(SOP) and (ii) Ultra-pure Magnesia

• The sea bittern and many of subsoil bitterns in the country are sulphate rich and hence the potash is recovered in form of SOP which is agronomically better fertilizer
• The unit operations used are simple and most of the operations are carried out at ambient temperature except drying and calcinations of magnesium hydroxide to form MgO

• SOP (K₂SO₄) offers an advantage over MOP (KCl) currently used by farmers with special focus on Chloride sensitive crops, Dryland agriculture, Sulphur responsive crops, Drip irrigation and Areas deficient in K & S.

Ultra-pure magnesia is used in refractory lining for primary steelmaking as well as in Magnesium metal production.

The technology developed is environmentally benign.

There is no effluent generated in the process that poses environmental problems.