Preparation Of Mica Nacreous Pigment By Urea Neutralization Method

The article chooses nacreous mica power of Yi Xing Limited enterprise in Jiang su . We has pretreated mica power and compare the difference of mica .We study the dynamics of preparing nacreous pigment of mica titanium and work out the parameter of a , Ea , k0, and deduce the reaction of dynamics speed equation,during preparing nacreous pigment of mica titanium and adjust pH with urea . According to the concentration and jioning speed of titanium salt,we summarize to the new method that join urea once and join titanium salt in succession .The experiment studies effect factors such as reaction temperaturex the joining amount of gather reagent, crystal type promoting reagent, calcined temperature and the coated ratio in preparing nacreous pigment of mica titanium.we deduce the condition of preparing nacreous pigment of mica titanium: pH is 2.2;temperature is 90 C;stiring speed is 210 n/min; the concentration of titanium salt is 10%;joining speed is 2mL/min;the amount of gather reagent is 0.01g;After drying, mica titanium should be slowly promoted temperature to dehydrate entirety during 100-200 C when it be calcined; mica titanium without tin should be calcined Ih at 700 C and mica titanium that inclusive TO2 is 25% had better; mica titanium with tin should be calcined 4h at 850 C.After we prepare nacreous pigment of mica titanium, we study the dynamics of preparing nacreous pigment of mica iron and work out the parameter, and deduce the reaction of dynamics speed equation . Hydrolyzation of urea and iron salt in the preparing mica iron be related.We prepare nacreous pigment of mica iron at this base, and take into account effect factors such as reaction temperature, the am3.5nt of gather reagent, calcined temperature and the coated proportion of mica titanium we deduce the condition of preparing nacreous pigment of iron titanium: pH is 3.5;temperature is 90 C;stiring speed is 210 n/min; the concentration of iron salt is 10%;joining speed is 2mL/min;the amount of gather reagent is 0.01g; mica iron should be calcined 1h at 660 C; mica iron that incisive Fe2O3 is 4% had better by material of mica titanium inclusive TO2 is 25%; mica iron that incisive Fe2O3 is20% had better by material of mica titanium inclusive TO2 is 5%;.