Preparation method of high-purity anhydrous rubidium iodide

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 ...

AI Technical Summary

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 difficult to achieve large-scale production

The rubidium iodide obtained by the above two processes have their own defects, such as: harsh process conditions, high cost, low purity (≤99%)

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