Cesium Sulfate CAS 10294-54-9

Cesium hydroxide is a basic material for the preparation of various cesium salts and metal cesium. Due to its unique properties, its applications in bioengineering, catalyst industry, battery and other industries are increasing. Preparation includes the following production processes:

Step 1. Purification of the cesium sulfate conversion solution: at normal temperature, add the cesium sulfate solution generated by the conversion of cesium alum into the stirring tank, start stirring, then add sulfuric acid, adjust the pH, remove the aluminum hydroxide precipitation, and then remove the The aluminum solution is pumped into another stirring tank, the solution is made into an alkaline demagnesium, and a decalcification agent is added to decalcify to obtain a cesium sulfate clean solution for use;
Step 2, extraction and separation of cesium from the sulfate system: adding the purified cesium sulfate solution in step 1 into the extraction tank, then adding an extraction agent, controlling the flow rate of the material and the pH value of the material, and carrying out continuous production;
Step 3. Back-extraction of extracting organic load: back-extracting the organic load generated in step 2 with an acid, so that cesium enters the solution from the organic load to achieve separation from impurities;
Step 4, the transformation of cesium back-extraction liquid: the cesium back-extraction liquid is pumped into the causticization reactor, and transformed into cesium hydroxide solution;
The impurity removal of step 5, transformation liquid: the solid impurity that step 4 transformation produces is separated from solution;
Step 6, the concentration of cesium hydroxide: the cesium hydroxide solution produced in step 5 is concentrated;
Step 7. Crystallization separation of cesium hydroxide: the cesium hydroxide concentrated in step 6 is crystallized by cooling, and separated to obtain a cesium hydroxide wet product;
Step 8, drying the cesium hydroxide product: drying the cesium hydroxide wet product obtained in step 7 to obtain a cesium hydroxide dry product.

In the method, cesium bisulfate crystals are prepared by cesium sulfate and sulfuric acid, and ground into powder, and then a cesium bisulfate film is prepared by hot pressing into a film, and then a metal or metal alloy is formed on the surface of the cesium bisulfate film by evaporation coating to form a layer The alloy layer can be used to obtain a medium temperature electrolyte membrane.

Compared with the traditional method, the prepared cesium hydrogen sulfate membrane of the present invention has the advantages of proton migration rate, high electrical conductivity, good stability, high working temperature range, long cycle life and good safety under the condition of medium temperature. Simple and easy to control, can be popularized and applied.

Put the cesium sulfate dark potion into the electrode cup of the cold cathode fluorescent lamp through a high-pressure blower through a dropper and a needle, and control the liquid level of the dark potion in the electrode cup to be 2/34/5 of the height of the electrode cup. When the dark potion reaches the setting When the liquid level is reached, the excess dark potion is sucked away, and the electrode cup is dried and coated at 250°C to complete the inner coating of the electrode.

In the method for coating the inner film of the electrode of the cold cathode fluorescent lamp provided by the present invention, the cesium sulfate solution is in a closed environment in the whole process flow, so as to prevent the influence of H2O volatilization on the concentration of the dark potion, and ensure the purity of the potion, which can fully dissolve the cesium sulfate solvent It is coated on the inner surface of the electrode cup to ensure that the work function of the electrode emission material is low; it absorbs the excess potion in the electrode cup, reduces the consumption of the dark potion, and improves the sealing quality of the electrode; the high-pressure blower can precisely control the flow of the dark potion in the dropper, Ensure accurate and stable supply of dark potion.