Shmigol I.N., JSC "VTI"
220.127.116.11. Ammonia-cyclical technology
A chemical basis for this technology is a balanced reaction between the saluted sulfite and ammonium bisulfite and sulfur dioxide, removed from the furnace gases:
(NH4)2SO3 + SO2 + H2O = 2NH4HSO3.
18.104.22.168. Magnesite cyclical technology
The essence of magnesite cyclical technology lays in binding of sulfur dioxide by a slurry of magnesium oxide:
MgO + SO2 = MgSO3.
22.214.171.124. Natrium sulfite-bisulphite technology
This method (also called - Wellman-Lord process) is similar to the ammonia-cyclical, but instead of ammonium salts, sulfurous natrium salts are used:
SO2 + Na2SO3 + H2O = 2NaHSO3.