Preparation method of cesium carbonate

Abstract

The invention relates to a preparation method of cesium carbonate. The cesium carbonate is prepared from raw materials of cesium powder, 98% of sulfuric acid and water, wherein a weight ratio of cesium powder to 98% of sulfuric acid to water is 1:0.7 to 0.8:1.8 to 2.2. The preparation method comprises the steps that: cesium powder is pretreated, such that a leached stock solution is obtained; the pH value of the stock solution is regulated; the stock solution is extracted, layered, back-extracted, dried by centrifugation, dried by baking, and packaged. After the processes, a finished product is obtained. The cesium carbonate preparation method provided by the invention is advantaged in that: (1) a high energy consumption of traditional alkali production methods is reduced, a requirement to equipment is reduced, and cesium carbonate production cost is greatly reduced; (2) generation of toxic substances during a production process with an acid method is avoided, production period is shortened, and productivity is improved; (3) a cesium ion leaching rate of the product provided by the present invention in a metal ion solution reaches 98.5%, while a cesium ion leaching rate of products provided with traditional technologies in a metal ion solution is 80%; (4) product quality is improved, and application scope of the product is enlarged.

Description

Technical field: [0001] The present invention relates to a kind of preparation method of compound, more specifically relate to a kind of preparation method of cesium carbonate. Background technique: [0002] In the prior art, there are two kinds of techniques for producing cesium carbonate: one is to use the alkaline method for production, the production process is to grind the cesium ore into powder until it can pass through a 200-mesh sieve, and then grind the cesium Ore powder with sodium carbonate and sodium chloride according to: Cesium ore powder: Na 2 CO 3 : NaCl = 1: 2.0: 1.2, put it into a high-temperature furnace and burn it for 6 hours at a temperature of 900°C. After burning, keep it at 800°C for 2 hours. After the end, add an aqueous solution for leaching. Through plate and frame filter press to remove solid waste residue, then use T-BAMBP for extraction and separation, and finally obtain the project product wet product by chemical method, and obtain the proje...

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Problems solved by technology

[0003] The disadvantage of the alkaline method of production is that the requirements for the equipment are too strict during production, because the production process needs to be burned at a high temperature of 900°C, and there are high requirements for the heat resistance of the equipment. And keep the reaction raw materials at 800°C for 2 hours, which also has high requirements for the heat preservation performance of the equipment, so the investment and update of the equipment for the production of this project by the alkaline method will be very large. In addition, the production of this process High temperature burning is required, and it lasts for 6 hours. The waste of energy consumption is conceivable. Now the country is emphasizing energy saving all the time. Therefore, for the project products produced by this process, both in terms of cost and Huge waste of energy consumption

The disadvantage of acid production is that this process consumes a lot of labor time when preparing the project product. In order to obtain cesium vanadium, the pretreatment of raw materials is impregnation, heating to boiling state and leaching, which takes up to 16 hours. In addition, a certain amount of barium salt needs to be invested in the production of project products for precipitation, and the barium carbonate produced is a highly toxic substance, which can cause great safety hazards, and the safety problem is difficult to overcome.

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