Rare earth composite cobalt ferrite ionic magnetic fluids were prepared by precipitation in the presence of Tri-sodium citrate.
采用化学共沉淀法以柠檬酸三钠为表面改性剂制备了离子型稀土复合钴铁氧体磁流体。
2
The results obtained show that the acidic bentonite has good catalytic properties on synthesis of tri-butyl citrate. The yield of tri-butyl citrate can reach 93.50% under the optimal conditions.
结果表明：酸性膨润土对柠檬酸三丁酯的合成具有良好的催化活性，最佳工艺条件下，收率可达93.50%。
3
The tri-n-butyl citrate was synthesized by esterification of citric acid with butyl alcohol in the catalysis of sodium bisulfate.