The invention discloses a method for preparing an intercalated
montmorillonite composite inorganic matter from nano
calcium carbonate. The method comprises the following steps: (1) carrying out organic intercalation, namely taking proper
montmorillonite to be prepared into 15-25% of suspension liquid by deionized water, controlling the temperature at 30-50 DG C, ultrasonically agitating for 1-2 hours, adding a certain amount of an organic intercalation agent cetyl trimethyl
ammonium bromide, heating to 70-80 DEG C, and further ultrasonically agitating for 2-4 hours, so as to obtain a stable suspension
system; (2) carrying out nano
calcium carbonate intercalation, adding a certain amount of CaC12 solution to the stable suspension liquid obtained in the step (1) at a
constant speed, agitating, and controlling the temperature at 30-50 DEG C and the adding time at 4 hours, simultaneously introducing a CO2 gas for 4-8 hours at the flow of 1L / h,
ageing for 12 hours, centrifuging and filtering to obtain a
filter cake; (3)
roasting, putting the
filter cake into a
muffle furnace with the CO2 gas to roast after crushing, wherein the
roasting temperature is 180-250 DEG C, and the
roasting time is 2-4 hours, cooling and discharging, and
grinding agate, so as to obtain the intercalated
montmorillonite composite material of the nano
calcium carbonate.