多元聚天冬氨酸水处理剂的合成及阻碳酸钙垢性能研究

The Synthesis of Multiple Polyaspartic Acid Water Treatment Agent and Study on Scale Inhibitor Performance of Calcium Carbonate

以马来酸酐和碳酸铵为原料,热缩制备了绿色阻垢剂聚天冬氨酸(PASP),并用红外光谱对聚合物进行了表征.研制了一种无磷多元的绿色阻垢剂,其组成为聚天冬氨酸(PASP)、单宁酸(Tanic acid)和葡萄糖酸钠(Sodiumgluconate).通过正交试验确定了该复合药剂的最佳配比.通过碳酸钙沉积法对PASP及其复合产品的阻垢性能进行了对比.结果表明:与PASP、Tanic acid或Sodium gluconate中的任意一种单剂以及PASP与Tanic acid或Sodi-um gluconate的二元复合水处理剂相比,PASP的三元复合水处理剂具有很好的阻碳酸钙垢的效果.当质量比m(PASP):m(Tanic acid):m(Sodium gluconate)=1:2:3,总加量为24mg.L-1时,阻垢率可达99.4%.实验结果为聚天冬氨酸的工业应用提供了参考价值.

As a green scale inhibitor,polyaspartic acid （PASP） was synthesized by thermal polymerization processes of maleic anhydride and ammonium carbonate and was characterized by mearks of infrared spectrometry （IR）. A kind of green scale inhibitor was developed, and the main composition included PASP, tannic acid and .sodium gluco- nate. The best ratio of this product was determined by orthogonal experiment. Scale inhibition performance of PASP and its compound products was compared by scale inhibition method against CaCO3. The results indicated that compared with single agent and the binary compound water treatment agent which was prepared by PASP with tannic acid or .sodium gluconate,an excellent scale inhibitor against CaCO3 was obtained by ternary compound wa- ter treatment agent of PASP. When the mass ratio was m（PASP） ：m（Tannic acid）： m（Sodium gluconate）= 1：2：3, the scale inhibition rate can almost reach to 99. 4~,and the total concentration was 24rng/I. The experimental re- suits provided a valuable reference for industrial application of polyaspartic acid.