Separation & Purification Technology

Be mainly used in:

For example, in the deep purification process of special gases such as silane and dichlorosilane required in semiconductor manufacturing, resin purification methods are used.

Solar energy (clean energy) - occupies an important position in the types of new energy

In the current mainstream processes at home and abroad, solar-grade polysilicon mainly uses the improved Siemens method and the silane method. Both methods are processes of purifying and separating materials before reduction or decomposition. In the process of purification and separation, the impurity boron is difficult to remove and is easily enriched in the system, which greatly affects the quality of the product. The improved Siemens method and the silane method are both processes of purifying and separating materials before reduction or decomposition.

Adsorption technology application - purification of leaching solution and recovery of valuable metals

In ion-adsorption type rare earth ores, rare earths mainly exist in the form of ions in clay minerals, with a high content of heavy rare earths, which are the main source of heavy rare earths in China.

Ion-type rare earth mining belongs to the category of chemical dissolution mining. The leaching solution in the mining process always contains a large amount of impurities, such as iron, aluminum, silicon, calcium, and silicates, which must be removed before further processing. Al3+ ions in the leaching solution will have an adverse effect on the subsequent rare earth enrichment and separation process, and are the most harmful impurities. At the same time, the content of alumina in the final oxidized product is an important standard for measuring product quality. The product requires REO/Al2O3 > 600, and the aluminum content is not higher than 0.3%, so the removal of aluminum ions is an important task in this link, followed by other impurities.

Adsorption technology application - rare earth element extraction and recovery

Using the functional groups on the surface of the resin to selectively adsorb rare earth ions, in practical industrial applications, it may be necessary to use multiple adsorption columns in series (possibly filled with resins with different functional groups) to achieve more efficient separation, or to operate under different operating conditions to achieve stepwise separation of different rare earth ions.

Adsorption can also extract metals from low-concentration solutions, so this process can also be used to clean industrial wastewater before it is released into groundwater. Therefore, in addition to the rare earth extraction process, rare earth metals can also be extracted from wastewater, reducing environmental pollution.