CaCO3 was pptd. from the waste distn. liq. from Solvay process by addn. of satd. soln. of NaHCO3 in a lab. reactor at 20-90 degrees C and varying dosing rate in presence of Na-2 versenate and studied for bulk and packing d., cryst. structure and H2O, paraffinic oil and But phthalate absorption capacity. The addn. of Na-2 versenate at 90 degrees C resulted in an increase in the d. of CaCO3 crystals. At 90 degrees C, the calcite and aragonite crystals were formed. At lower temps., formation of calcite crystals was also obsd.