Preparation method of indium acetate crystal

Abstract

The invention relates to a preparation method of indium acetate crystals, which comprises the following steps: S1, preparing sponge indium and pure water according to a certain solid-to-liquid ratio,adding the sponge indium into the pure water, stirring and dispersing the components to form a first mixed solution, and heating the mixture the first mixed solution to 70-80 DEG C; S2, adding glacialacetic acid into the first mixed solution until the pH value of the first mixed solution is less than 1.8 to form a second mixed solution, then adding a hydrogen peroxide solution into the second mixed solution at a certain dropping speed, and continuously adding glacial acetic acid into the second mixed solution to enable the pH value of the second mixed solution to be 1.0-1.8 to form a third mixed solution, keeping the temperature at 70-80 DEG C for continuous reaction until the density of the third mixed solution is 1.10-1.20 g / ml, stopping the reaction, and filtering the third mixed solution until the solution is clear and transparent to obtain an unreacted sponge indium and indium acetate solution; and S3, transferring the indium acetate solution to an evaporation kettle, adding acetic acid until the molar ratio of indium ions to free acetic acid in the solution is 1:(0.05-1), heating the solution for evaporation, cooling the solution, carrying out suction filtration, and dryingthe product to obtain indium acetate crystals.

Description

technical field [0001] The invention relates to the field of preparation of indium compounds, in particular to a method for preparing indium acetate crystals. Background technique [0002] The molecular formula of indium acetate is In(CH 3 COO) 3 , the molecular weight is 291.8, and the physical properties are white powder. It is used in the preparation of indium tin oxide nanopowder, the field of copper indium selenium quantum dots, and the field of dye solar cells. It is a product with great market value. [0003] At present, there are no related patents and literatures to disclose the synthesis method of indium acetate. In the indium industry, the reaction of elemental indium and glacial acetic acid is mainly used to prepare indium acetate solution, and indium acetate crystals are obtained through evaporation and crystallization. This method has the following disadvantages: acetic acid is volatile, and the equipment is easy to be corroded. At the same time, the utilizat...

AI Technical Summary

Problems solved by technology

In the indium industry, the reaction of elemental indium and glacial acetic acid is mainly used to prepare indium acetate solution, and indium acetate crystals are obtained through evaporation and crystallization. This method has the following disadvantages: acetic acid is volatile, and the equipment is easy to be corroded. At the same time, the utilization rate of acetic acid is reduced. ;The reaction speed between acetic acid and indium particles or indium strips is slow. Acetic acid is a weak acid. After heating, the reaction between glacial acetic acid and indium is very slow. Even if hydrogen peroxide is added, the dissolution period is still very long