What should be paid attention to when preparing pseudo boehmite

Pseudoboehmite is mainly used as a catalyst carrier, catalyst, and adsorbent, and is a new type of material with broad development prospects. What issues should be noted when preparing this material? Here are some precautions for the editor's organization.

1. Raw material selection:

The raw materials for producing pseudo boehmite are divided into three types based on the cerium content. The cerium polishing powder is produced using cerium nitrate, and the polishing powder particles produced by cerium nitrate have better performance. Lanthanum cerium produces cerium rich polishing powder, which is white in color; Low cerium polishing powder is made of mixed soil carbonate ore and has a brownish red color.

2. Sedimentation method:

The precipitation process determines the size and shape of polishing powder particles, affecting the polishing speed, wear resistance, and flowability of pseudo boehmite. Oxalic acid and ammonium bicarbonate, two precipitation agents, can be used to produce polishing powder. The polishing powder obtained from oxalate has a single crystal structure, good flowability, and is easy to settle. Therefore, hydraulic method is used for grading. The polishing powder obtained from carbonate has a sheet-like agglomeration structure and good suspension performance, but its wear resistance and flowability are not as good as alumina polishing powder produced from oxalate. However, it is widely used due to its low production cost.

Pseudo boehmite can meet the requirements of uniform dispersion of oxygen source and reaction mixing, and is the primary choice of aluminum source for experiments. The above is all the content that the editor of Yangzhou Zhongtianli has compiled for everyone, hoping to be helpful.