Method for preparing spectrally pure magnesium oxide

Abstract

The invention relates to a method for preparing spectrally pure magnesium oxide. The preparation method comprises the following steps of: reacting metal magnesium powder with nitric acid, namely putting the magnesium powder into a small white porcelain pot, dripping high-purity diluted nitric acid into the pot, then adding H2O2 into the pot, and filtering the mixture to obtain filtrate A so as toobtain magnesium nitrate; and preparing saturated solution from high-purity oxalic acid, slowly adding the oxalic acid solution into the filtrate A to generate a large amount of white sediment, and heating and cooling the sediment to separate out the spectrally pure magnesium oxide. According to the preparation method, the metal magnesium powder is reacted with the nitric acid to prepare the magnesium nitrate, the prepared magnesium nitrate is reacted with the high-strength oxalic acid to generate magnesium oxalate, and the magnesium oxalate is dried at a high temperature to form the spectrally pure magnesium oxide. The preparation method has the advantages of simple processes, easy control of operation steps, advanced technology and high production efficiency; and the prepared spectrallypure magnesium oxide product has high purity and low impurity content, and the prepared magnesium oxide meets the requirement of high-end technology of the electronic industry.

Description

technical field [0001] The invention belongs to the field of preparation methods of inorganic compounds, in particular to a preparation method of spectrally pure magnesium oxide. Background technique [0002] Spectrum pure magnesium oxide is widely used in the electronic industry to configure silicon single wafer grinding materials. It has good adsorption and low melting point, and can change the metal lattice structure to make it finer. Therefore, it is often used in paint coatings, refractory bricks, Magnetic materials, ceramics, rubber tires, etc. [0003] At present, the commonly used method is to place magnesium hydroxide in the disk into a thin layer as much as possible, place it in the center of the quartz heating tube, and heat it to 85°C with an electric furnace to obtain magnesium oxide. The magnesium oxide produced by this method has low purity and no impurities. High, can only meet the rubber and oil industry, can not meet the needs of high-end technology. [0...

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Problems solved by technology

[0003] At present, the commonly used method is to place magnesium hydroxide in the disk into a thin layer as much as possible, place it in the center of the quartz heating tube, and heat it to 85°C with an electric furnace to obtain magnesium oxide. The magnesium oxide produced by this method has low purity and no impurities. High, can only meet the rubber and oil industry, can not meet the needs of high-end technology