Preparation method of high-purity anhydrous rubidium iodide

A technology of rubidium iodide and iodide, applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve the problems of difficulty in large-scale production, high raw material cost and energy consumption, harsh process conditions, etc. Stable, easy to operate, high-purity effect

Pending Publication Date: 2021-12-03
GANFENG LITHIUM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the water content can be obtained below 100ppm, it has high requirements for equipment, low yield, high cost of raw materials and high energy consumption, and it is dif...

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  • Preparation method of high-purity anhydrous rubidium iodide

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preparation example Construction

[0028] The invention provides a kind of preparation method of high-purity anhydrous rubidium iodide, it is characterized in that, comprises the following steps:

[0029] Step A Dissolution of rubidium carbonate: at room temperature, take 400-600g of rubidium carbonate and put it into a reaction vessel, slowly add pure water with a mass-liquid-solid ratio of 2-4:1 while stirring, stir for 10-30min, wait for carbonation Rubidium is completely dissolved;

[0030] Step B Filtration and impurity removal: At room temperature, filter the solution obtained in step A while it is hot, and use a 1-5um sand core funnel for filtration to remove alkaline insolubles and other impurities to obtain a clear and transparent rubidium carbonate solution;

[0031] Step C disproportionation reaction: at normal temperature, slowly pour into the rubidium carbonate solution obtained in step B under stirring conditions the iodine element whose molar ratio Li:I is 1:1 to carry out disproportionation reac...

Embodiment 1

[0049] step a. Dissolution of rubidium carbonate: At room temperature, put 400g of rubidium carbonate into the reaction vessel, slowly add 800g of pure water while stirring, stir for 10min, and wait until the rubidium carbonate is completely dissolved.

[0050] Step B. Filtration to remove impurities: At room temperature, filter the solution obtained in the above step A while it is hot, and use a 3um sand core funnel for filtration to remove alkaline insolubles and other impurities to obtain a clear and transparent rubidium carbonate solution.

[0051] Step C. Disproportionation reaction: at normal temperature, slowly pour into the rubidium carbonate solution obtained in step B under stirring conditions, the molar ratio Rb:I is 1:1 iodine simple substance 439.6g to carry out disproportionation reaction, after stirring for 15min, the reaction generates dark brown solution .

[0052] Step D. Hydrazine hydrate reduction reaction: at room temperature, slowly add 54.2 g of hydr...

Embodiment 2

[0059] step a. Dissolution of rubidium carbonate: At room temperature, put 500g of rubidium carbonate into the reaction vessel, slowly add 1500g of pure water while stirring, stir for 20min, and wait until the rubidium carbonate is completely dissolved.

[0060] Step B. Filtration and removal of impurities: at room temperature, filter the solution obtained in the above step A while it is hot, and use a 4um sand core funnel for filtration to remove alkaline insolubles and other impurities to obtain a clear and transparent rubidium carbonate solution.

[0061] Step C. Disproportionation reaction: at normal temperature, slowly pour into the rubidium carbonate solution obtained in step B under stirring conditions, the molar ratio Rb:I is 1:1 iodine simple substance 549.5g to carry out disproportionation reaction, after stirring for 18min, the reaction generates a dark brown solution .

[0062] Step D. Hydrazine hydrate reduction reaction: at room temperature, slowly add 68.5 g...

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Abstract

The invention discloses a preparation method of high-purity anhydrous rubidium iodide. The preparation method of the high-purity anhydrous rubidium iodide comprises the following steps: A, under the condition of normal temperature, adding 400-600g of rubidium carbonate into a reaction container, slowly adding pure water with the mass liquid-solid ratio of (2-4): 1 while stirring, and stirring the solution for 10-30 minutes until the rubidium carbonate is completely dissolved; B, at normal temperature, filtering the solution obtained in the step A while the solution is hot by adopting a sand core funnel of 1-5 microns, and removing alkaline insoluble substances and other impurities to obtain a clear and transparent rubidium carbonate solution; C, at normal temperature, slowly pouring an iodine simple substance with the molar ratio of Li to I being 1:1 into the rubidium carbonate solution obtained in the step B under a stirring condition to carry out disproportionation reaction, and stirring the solution for 15-20 min to generate a dark brown solution. The preparation method of the high-purity anhydrous rubidium iodide is simple and practical in process, low in equipment investment, low in production cost, high in yield, high in economic value, small in environmental pollution and high in production safety.

Description

technical field [0001] The invention relates to the technical field of solid-state battery electrolyte preparation, in particular to a preparation method of high-purity anhydrous rubidium iodide. Background technique [0002] Rubidium iodide has been widely used in various fields in recent years. In the medical field, rubidium iodide can sometimes replace potassium iodide in the treatment of goiter. In the field of battery materials, rubidium iodide can be used as a battery reaction material in micro-high-energy batteries; it can also be used to prepare RbAg, an ultra-high electronic conductor at room temperature 4 I 5 , often used as thin film solid battery electrolyte. In addition, in the field of optoelectronic devices, neutron detectors using doped rubidium iodide crystals as solid-state scintillators have the advantages of high light yield, large capture product, and high detection efficiency. In addition, in the field of chemical organic synthesis, rubidium iodide ...

Claims

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Application Information

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IPC IPC(8): C01D17/00
CPCC01D17/00C01P2006/82C01P2006/80
Inventor 李良彬叶明孙琦廖萃潘志芳傅雨虹乔琳菊胡斌宋青荣
Owner GANFENG LITHIUM CO LTD
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