Synthetic method and application of dimethylphosphinic acid glutamate

The invention discloses a synthetic method and application of dimethylphosphinic acid glutamate. Dimethylphosphinic acid glutamate is synthesized by heating glutamic acid, formaldehyde and phosphorous acid in a ratio of 1 to (2-5) to (1.5-2.5) under the hydrochloric acid acidic condition at 20-120 DEG C. Glutamic acid has excellent scale inhibition and corrosion inhibition performance, can be independently used and can also be compounded with other scale-inhibition dispersion agents, corrosion inhibitors, bactericides and the like for use. By independently utilizing 5ppm addition concentration of glutamic acid, the calcium carbonate inhibition rate reaches above 80%, and by virtue of an A3 carbon steel hanging-sheet test, the inhibition velocity of 15ppm-20ppm addition concentration of glutamic acid is below 0.05mm/a. 本发明公开种谷氨酸二甲叉膦酸的合成方法及应用。谷氨酸二甲叉膦酸是由谷氨酸与甲醛、亚磷酸按照1:2~5:1.5~2.5的比例在盐酸酸性条件，于温度20~120℃加热合成。本发明所述谷氨酸具有优异的阻垢缓蚀性能，可以单独使用也可以和其他类别的阻垢分散剂、缓蚀剂、杀菌剂等复配使用。单独使用5ppm添加浓度的阻碳酸钙率达到80%以上，采用A3碳钢挂片试验，15~20ppm添加量的腐蚀速率在0.