聚硅硫酸铁铝的制备及其脱色性能研究

Study on Preparation and Decolorness Property of the Polysilicate Ferro-aluminum Sulfate

本文研究了用硅酸钠、硫酸亚铁和硫酸铝制取聚硅硫酸铁铝絮凝剂(PSFA)的制备条件及应用性能,确定了制备PSFA絮凝剂的优化条件:Fe2+/Al3+=1∶3(mol/mol)、(Fe2++Al3+)/SiO2=1∶1(mol/mol)、聚合时间1.5h、聚合温度70℃.用PSFA絮凝剂处理造纸黑液,结果表明PSFA絮凝剂的脱色效果优于市面上其它类型的无机絮凝剂,具有用量少,沉降快的优势,是一种无毒、高效、值得推广的絮凝剂.

A new polysilicate ferro-aluminum sulfate (PSFA) was prepared by using sodium silicate, ferro sulfate and aluminum sulfate as raw materials. The conditions of preparing PSFA were optimized: the molar ratio of Fe2+ to Al3+ was 1∶3; the molar ratio of Fe2+ and Al3+ to SiO2 was 1∶1; the polymeric time was 1.5 h;the polymeric temperature is 70 ℃. PSFA made under the optimum conditions was used in the treatment of wastewater sample of papermaking. Experimental results showed that the decolorness property of PSFA was superior to other sorts of inorganic polymers in the marketplace. It has advantages of less dosage and quicker sedimentation.It was a harmless, high effective and worth-popularized flocculant.