precipitation reaction
1.Precipitation Reaction of RECl 3 with NH 4HCO 3 and Co Precipitation Behavior of Accompanying Impurity lons
2.Negative thermal expansion (NTE) ZrW2O8 powders were synthesized using co-precipitation, solid state reaction and Sol-Gel route.
3.Abstract: The equilibrium constant of carbonization reaction of lime white was calculated using three thermodynamics methods.The results indicate that the carbonization reaction of lim white was the neutralization reaction between acid and alkali first,and it was the transform reaction of precipitation second .The essential cognition of the carbonization reaction of lime white was deepend.It was of guiding significance for industrial production of light(precipitation)calcium carbonate.
5.The Co3O4 catalyst was prepared by liquid-precipitation method. Taking CO oxidation as a probe reaction,the activity and structure were characterized by TG-DTG、XRD、TEM and XPS.
6.The precursor of Cu(OH)2 was prepared with NaOH and CuSO4·5H2O using the chemical precipitation. The Cu(OH)2 particle size was 30-70 nm. The reaction conditions were that: reacting temperature was 25 ± 1 ℃ , pH value of reacting terminal was 7, ageing time was 1 h.
7.The precipitation of silver from used[Ag(S 2O 3) 2] 3- by (NH 2) 2 CSO 2 was studied,the optimum reaction conditions observed.
8.The effects of reaction temperature,UNH concentration,urea amounts and reaction period on the ADU precipitation is researched, and ADU powder with good technological properties is prepared.
9.SnO 2 powder has been prepared by following process:titrate concentrated ammonia into aqueous solution of crystalline SnCl 4·5H 2O by liquid phase precipitation, during precipitation add macromolecular organic dispersant into it, intensely agitate the mixture, control pH value after reaction, wash it in anhydrous alcohol, cool, dry and select suitable calcining temperature etc.
10.A kinetic study of the oxidation of sulfur(Ⅳ) by hydrogen peroxide (H2O2) was performed in the media of pure water and acid precipitation at Liuzhou City, China. It is revealed that only free S (Ⅳ) can react with H2O2, while the S(Ⅳ) adduct of methanal does not take part in the reaction.
