A kind of preparation method of flaky cerium carbonate
A cerium carbonate and flake technology, which is applied in the field of preparation of flake cerium carbonate, can solve the problems of complex and non-single cerium carbonate structure, high structural impurities, low output, etc., and can meet the requirements of material impurity level, short production cycle, and low production. low cost effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0025] A preparation method of flaky cerium carbonate, the reaction principle of the flaky cerium carbonate is as follows:
[0026]
[0027] like figure 1 As shown, the trivalent cerium solution A is a Ce3+ solution with a concentration of 0.58mol / L~0.87mol / L (that is, 100g / L~150g / L in terms of CeO2), and the acidity of the solution is adjusted to 0.1±0.01mol / L, and the temperature is 55± 5℃; B is ammonium bicarbonate solution with concentration 1.27mol / L~1.9mol / L (100g / L~150g / L), temperature is 55±5℃; C is deionized water, temperature is 55±5℃;
[0028] When the reaction starts, start stirring, first add a small amount of ammonium bicarbonate solution B to deionized water C, then add trivalent cerium solution A to deionized water C, trivalent cerium solution A and ammonium bicarbonate Solution B was simultaneously added to deionized water C to complete the reaction.
[0029] The specific implementation steps for the preparation of this flake cerium carbonate are:
[003...
example 1
[0037] ① Equipped with 1L of cerium chloride solution with a concentration of 0.58mol / L, equipped with 1.6L of ammonium bicarbonate with a concentration of 1.27mol / L, and controlled their temperature at about 55 °C;
[0038] ②Add 0.5L deionized water C into a 3L beaker, and put it in a water bath to keep the temperature at 55℃;
[0039] ③Turn on stirring, rotate speed 250r / min, first add 16 ml of prepared ammonium bicarbonate to deionized water C, then slowly add ammonium bicarbonate and cerium chloride solution dropwise into the beaker simultaneously, ammonium bicarbonate and chlorination The flow rate of cerium is about 16ml / min. After the reaction is about 5min, the flow rate of ammonium bicarbonate is increased to 50ml / min, and the flow rate of cerium chloride is increased to 33ml / min.
[0040] ④ Repeatedly washing the cerium carbonate precipitate with deionized water C at 40°C so that the conductivity of the washing water is less than 10 μs / cm;
[0041] ⑤ Dry the washed ...
example 2
[0044] The cerium chloride in Example 1 was replaced with cerium nitrate, and the experimental steps of Example 1 were repeated to obtain pure white flaky cerium carbonate.
[0045] Electron microscope picture such as image 3 shown.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More