氨基多元膦酸水处理剂的合成及性能分析

Synthesis and performance of dimethyl methylene diphosphonic acid

以N.N-二甲基甲酰胺、三氯化磷为主要原料合成了氨基多元膦酸水处理剂—二甲基甲叉二膦酸。并对其缓蚀阻垢能力进行了考察。试验表明:二甲基甲叉二膦酸具有很好的缓蚀效果,在与Zn2+复配或采用预膜处理后其缓蚀性能更为优越。对碳酸钙、硫酸钙和磷酸钙具有很好的抑制能力,即使在Ca2+浓度较高体系也有较好的阻垢效果。

The dimethyl methylene diphosphonie acid was synthesized with N. N-dimethyl formamide and phosphorus trichloride. The performance of inhibiting scale and inhibiting corrosion of the product was studied. The results show that the inhibiting corrosion of the product is good and better when it composed with Zn^2＋ or pre-filming. Meanwhile, the product has good inhibiting scale on calcium carbonate,calcium sulphate and calcium phosphate,even if the concentration of Ca^2＋is higher.