What preparation method is used to purify high-purity alumina? Three methods revealed

High purity alumina, with the word 'high purity', is likely to be associated with ordinary and ordinary alumina. In fact, compared to ordinary alumina, high-purity alumina has higher purity and superior optical, thermal, magnetic, and mechanical properties. Nowadays, high-purity alumina has become a new material and is widely used, and the market demand is gradually increasing. However, there are some doubts about how to improve the purity of ordinary alumina and how to use preparation methods to improve its own performance. Yangzhou Zhongtianli editor will talk specifically about the purification and preparation methods of high-purity alumina.

1. Improved Bayer method

In fact, the Bayer process uses the Bayer process as the raw material, and based on multiple experiments and analyses, uses processes such as desilication, iron removal, and decomposition to obtain high-purity alumina.

2. Inorganic aluminum salt thermal decomposition method

① Ammonium aluminum sulfate thermal decomposition method

The preparation method of aluminum sulfate through thermal decomposition has reached industrial scale production, and it is also due to the simple characteristics of the ammonium aluminum sulfate thermal decomposition method in the entire preparation process.

② Ammonium aluminum carbonate thermal decomposition method

Firstly, aluminum ammonium sulfate is prepared, and then aluminum ammonium sulfate reacts with ammonium bicarbonate to obtain basic aluminum ammonium carbonate. Then, it is subjected to aging, sedimentation, filtration, drying, grinding, high-temperature decomposition and other processes to obtain high-purity aluminum oxide.

3. Alcoholic aluminum salt solution hydrolysis

By utilizing the reaction between elemental aluminum and organic alcohols, alcohol aluminum is obtained, which is then subjected to purity extraction, hydrolysis, aging, drying, roasting, and other processes to prepare high-purity aluminum oxide.

Today, the editor of Zhongtianli shared with you three methods for purifying high-purity alumina, hoping that everyone has a certain understanding of purification preparation methods. In fact, there is an important process before purification, which is impurity removal. I will share with you the methods of impurity removal in the next section. If you have a need for high-purity aluminum oxide, please feel free to contact us at any time on 0514-80388763. Yangzhou Zhongtianli's leading products include three series of more than ten types of products, including high-purity arsenic, high-purity aluminum oxide, and silicon carbide, with two factories. Yangzhou Zhongtianli welcomes you to inquire and understand.