Background Introduction:

During the production of nano-sized fine powder by the wet chemical method, various anionic and cationic impurity ions remain after the synthetic chemical reaction, which, if not cleaned properly, can affect the performance of the fine (nano) powder. Therefore, the slurry of the fine product must be washed during the production process to remove impurity ions and improve product purity. Traditional processes use plate and frame filtration, high-speed centrifugation, and other washing methods, but these traditional methods are slow in filtration speed and also have the issue of powder leakage during washing., turbid filtrate, excessive water usage for washing, environmental pollution and powder loss, and high labor intensity.

Application of Membrane Separation Technology in the Purification of Nanopowder

Addressing the aforementioned issues,He Cheng FiltrationBased on years of experience in membrane separation technology applications, we have integrated this membrane separation technology into the production process of nano powder.Currently,"Harmony Filtration" has over a dozen successful cases in the nano-powder industry!

Inorganic ceramic membraneSystem”Supporting body made of porous inorganic ceramic material, surface coated and fired at high temperature, with high separation precision, good properties, stable operation, etc. Compared with the membrane, it has superior resistance to contamination, acidity and alkalinity, and temperature, therefore,BeWidely applied in the separation of complex fluids with high solid content, high viscosity, and hard particles.Applications in the field of nanometer powder washing and purification include: such as nanometer catalysts, nanometer titanium oxide, zinc oxide, aluminum oxide, and other oxides, nanometer barium titanate, barium carbonate, and other nanometer inorganic salts, nanometer zirconium hydroxide, strong oxidizing hydroxides, silver powder, and other suspensions for washing and purification.

CeramicMembrane separation technology has resolved technical bottlenecks such as slow removal of impurities in nano powder, low powder yield, and continuous process issues.EffectiveDe-gasRaw MaltImpurities ions, preparationExcludingFine pure nano powder.

Nano-powder separation and purification membrane technology: 

Membrane separation technologyNanoPowder separation and purificationTheAdvantages;

① High filtration accuracy, high retention rate for fine powders, almost no loss or leakage, the concentration of the concentrated liquid can reach20%, high liquid clarity.

② Excellent cleaning effect, no powder leaching, capable of producing high-purity fine powder.

③ Inorganic ceramic membrane elements, withstanding high temperatures and strong acids and alkalis, offering long service life for the membrane elements.

④ The washing process features controllable process parameters, which aids in enhancing the dispersibility of the powder.

⑤ The main body of the equipment is manufactured from hygienic-grade stainless steel.

⑥ ControlSystemConfigurable for manual or semi-automatic according to customer requirementsOrPLC full automatic control, easy operation and maintenance of equipment;

⑦ Washing water availableRO membrane further treatment, water returned for washing process, reducing water consumption costs.