Ultra-fine aluminum silicate is synthesized from aluminum sulfate and sodium silicate generallyIt consumes aluminum containing chemicals with a high costTherefore

a new method that used aluminum bearing waste liquid as raw material was developed. The new method consisted of reaction

polymerization

surface modification

aging

and washing.Besides

the properties of the product were studied with compositional analysis

infrared spectroscopy

SEM

XRD.The results showed that the diameter of primary particles of the product was about 10～40 nm

and the mean diameter was 100nm for the secondary particlesA kind of 3-D network with Si—O and Al—O bonds built up its amorphous non-crystalline structureThe product was up to the current enterprise standard of ChinaIts chemical formula was Na2O · Al2O3 ·mSiO2·nH2O（m=9—11

n=4—6）.