聚合膦酸羧酸型水质稳定剂PHPMA的合成与缓蚀阻垢性能的评定

本文用具有优异阻垢性能的水解聚马来酸酐和亚磷酸为原料,经一步反应合成得到膦酸化水解马来酸酐。经色质图谱和其它分析方法研究了产物的分子结构,发现无论羧基和膦酸基团都在同一分子中存在着。产物的分子结构可示意为: 由于它既是一种聚合羧酸型化合物,又是一种聚合膦酸型化合物,因此既有优异的缓蚀性能又具备优异的阻垢性能。当产物在低剂量如5ppm和其它一些有机多元膦酸如羟基乙川二膦酸(2ppm)或乙二胺四甲叉膦酸(2ppm)以及锌离子(1ppm)等复合使用时,发现产物和它们有较好的协同效应。实验证实了,即使在含高氯离子浓度(40000ppm)的水质条件下,产物也可被用作为一种好的缓蚀剂和阻垢剂。

The synthesis of phosphonated hydrolytic polymaleic anhydride (PHPMA) and the evalution of its anticorrosion and antiscaling properties in treatment of cooling water system

In cooling water treatment and in boiler water treatment systems, the hydrolytic polymaleic anhydride, (HPMA)is not a satisfactory corrosion inhibitor. In order to improve its corrosion inhibition, phosphonic acid groups were introduced intramolecularly into the HPMA molecule, and a new compound, PHPMA, is formed. Studied structurally with chromatographic and mass spectroscopic methods together with other analytical determinations, it has been found that both carboxyl groups and phosphonic acid groups are presented in the same molecule, which can be represented by the following structural formula, asThe synthesis of PHPMA can be completed by using HPMA and phosphonic acid, a onestep process. It possesses excellant anticorrosion and antiscale properties, since it has a polycarboxytic acid and a polyphosphonic acid as its own constituents.A good synergistic effect was displayed, it can be used as a anticorrosion agent and a scaling inhibitor in a cooling water system containing chloride ion concentration as high as 40000 ppm.