Cesium iodide purification process

Abstract

The cesium iodide purification process comprises the following steps: step 1, weighing 80.7 g of cesium iodide and 80.8 g of high-purity water, putting the cesium iodide and the high-purity water into a beaker with the volume of 300 m, and heating until solids are dissolved; 2, cooling and crystallizing the solution in a water bath, and drying the solid in a drying oven after suction filtration to obtain a first batch of finished products; step 3, pouring the mother liquor subjected to the first suction filtration into a beaker, weighing 144.9 g of the mother liquor, heating to evaporate water, placing 129.7 g of the residual solution into a water bath for cooling crystallization, and after suction filtration, putting the solid into a vacuum drying oven for drying to obtain a second batch of finished products; step 4, weighing 112.5 g of remaining mother liquor after the second suction filtration, heating to evaporate part of water, placing 92.6 g of remaining solution in a water bath for cooling crystallization, and after suction filtration, placing the solid in a drying oven for drying to obtain a third batch of finished products; according to the cesium iodide purification process provided by the invention, cesium iodide with relatively high impurity content can be subjected to multi-batch purification treatment, so that the use requirements of multiple industries are met, and the cesium iodide purification process has a relatively good use effect.

Description

Technical Field

[0001] The present application relates to the technical field of cesium iodide preparation, and specifically discloses a cesium iodide purification process. Background Art

[0002] Cesium iodide is a colorless crystal or white powder with a density of 4.51g / cm3, a melting point of 621℃, a boiling point of 1280℃, and is easily deliquescent. It is very soluble in water, soluble in ethanol, slightly soluble in methanol, and almost insoluble in acetone. It is irritating. It is sensitive to light and has a refractive index of 1.7876. When cesium iodide is burned on a flame, it will have a sky blue flame color.

[0003] Cesium iodide crystals have the advantages of high luminous intensity, strong radiation resistance, large stopping power, and no deliquesce. Therefore, cesium iodide scintillation detectors have been widely used in high-energy physics research, nuclear medicine, environmental testing, oil well logging, geological exploration, and safety testing.

[0004] Due to the particularity of the application field of cesium iodide, the quality requirements for this product are relatively high in production practice; the commercially available cesium iodide contains a large amount of high-content impurities and cannot be used in the above-mentioned fields without purification treatment. Therefore, the present application discloses a cesium iodide purification process.

[0005] Application Contents

[0006] In order to overcome the deficiencies of the prior art, the present application discloses a cesium iodide purification process.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted in this application is: a cesium iodide purification process, which specifically includes the following steps:

[0008] Step 1: weigh 80.7 g of cesium iodide and 80.8 g of high-purity water into a 300 ml beaker and heat until the solid is dissolved;

[0009] Step 2: placing the above solution in a water bath to cool and crystallize, filtering and placing the solid in a drying oven to dry to obtain the first batch of finished products;

[0010] Step 3: Pour the mother liquor after the first filtration into a beaker, weigh 144.9 g, heat to evaporate the water, and place the remaining solution 129.7 g in a water bath for cooling and crystallization. After filtration, place the solid in a vacuum drying oven to dry to obtain the second batch of finished products;

[0011] Step 4: Weigh 112.5 g of the mother liquor remaining after the second filtration, heat to evaporate part of the water, and place the remaining solution 92.6 g in a water bath for cooling and crystallization. After filtration, place the solid in a drying oven for drying to obtain the third batch of finished products;

[0012] Step 5, weigh 73.4 g of the remaining mother liquor, put it into a drying oven and dry it to obtain a non-finished product.

[0013] Further preferably, the water bath temperature in the second, third, and fourth steps is 50 °C.

[0014] Further preferably, the drying temperature of the vacuum drying oven in the second, third, fourth, and fifth steps is 100 °C, and the vacuum degree is 0.07 Mpa.

[0015] The present application achieves the following beneficial effects:

[0016] The cesium iodide purification process provided by the present application can perform multi-batch purification on cesium iodide with a relatively high impurity content, ensuring that the finally obtained multi-batch cesium iodide products contain less Rb85 and Rb87 impurities, meeting the usage requirements of multiple industries and having a better usage effect. As for other features and advantages of the present application, they will be described in the subsequent specification, and will be partially obvious from the specification, or understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures pointed out in the specification. Specific Embodiments

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0018] Embodiment

[0019] In order to purify cesium iodide and meet the usage requirements of various industries, the present application discloses a cesium iodide purification process, which specifically includes the following steps:

[0020] Step 1: Weigh 80.7 g of cesium iodide and 80.8 g of high-purity water and put them into a 300 ml beaker, and heat until the solid dissolves;

[0021] Step 2: Place the above solution in a water bath for cooling crystallization, and after suction filtration, put the solid into a drying oven for drying to obtain the first batch of finished products;

[0022] Step 3: Pour the mother liquor after the first suction filtration into a beaker, weigh 144.9 g, heat to evaporate the water, and the remaining solution is 129.7 g. Place it in a water bath for cooling crystallization, and after suction filtration, put the solid into a vacuum drying oven for drying to obtain the second batch of finished products;

[0023] Step 4: Weigh 112.5 g of the remaining mother liquor after the second suction filtration, heat to evaporate part of the water, and the remaining solution is 92.6 g. Place it in a water bath for cooling crystallization, and after suction filtration, put the solid into a drying oven for drying to obtain the third batch of finished products;

[0024] Step 5: Weigh 73.4 g of the remaining mother liquor and put it into a drying oven for drying to obtain non-finished products.

[0025] Among them, the water bath temperature in Step 2, Step 3, and Step 4 is 50 °C.

[0026] The drying temperature of the vacuum drying oven in Step 2, Step 3, Step 4, and Step 5 is 100 °C, and the vacuum degree is 0.07 Mpa.

[0027] The cesium iodide of the two batches obtained above was tested, and the following data was obtained:

[0028]

[0029] It can be clearly seen from the above data that the finally obtained cesium iodide product contains less Rb85 and Rb87 impurities.

[0030] In addition, by comparing the crystals obtained in August and September, the following data was obtained:

[0031]

[0032] It can be concluded from the above data that when the mass ratio of cesium iodide to water is closer to 1:1, the content of impurity elements in the finished product is lower.

[0033] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0034] The above embodiments are only for illustrating the technical concept and features of the present application, and their purpose is to enable those skilled in the technical field to understand the content of the present application and implement it accordingly, and cannot be used to limit the protection scope of the present application. Any equivalent transformation or modification made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A cesium iodide purification process, characterized in that, Specifically, it includes the following steps: Step 1: Weigh 80.7 g of cesium iodide and 80.8 g of high-purity water and put them into a 300 ml beaker, and heat until the solid dissolves; Step 2: Place the above solution in a water bath for cooling crystallization. After suction filtration, put the solid into a drying oven for drying to obtain the first batch of finished products; Step 3: Pour the mother liquor after the first suction filtration into a beaker, weigh 144.9 g, heat to evaporate the water, and the remaining solution is 129.7 g. Place it in a water bath for cooling crystallization. After suction filtration, put the solid into a vacuum drying oven for drying to obtain the second batch of finished products; Step 4: Weigh 112.5 g of the remaining mother liquor after the second suction filtration, heat to evaporate part of the water, and the remaining solution is 92.6 g. Place it in a water bath for cooling crystallization. After suction filtration, put the solid into a drying oven for drying to obtain the third batch of finished products; Step 5: Weigh 73.4 g of the remaining mother liquor and put it into a drying oven for drying to obtain non-finished products.

2. The cesium iodide purification process according to claim 1, wherein, The water bath temperature in Step 2, Step 3 and Step 4 is 50 °C.

3. The cesium iodide purification process according to claim 1, wherein, The drying temperature of the vacuum drying oven in Step 2, Step 3, Step 4 and Step 5 is 100 °C, and the vacuum degree is 0.07 Mpa.

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