The Material Exhibited 99% Inhibition of Ca3(PO4)2 Scale Precipitation

A novel acrylic acid (AA)-allyloxy poly(ethylene glycol) polyglycerol carboxylate (APEG-PG-COOH) copolymer has been synthesised to control Ca3(PO4)2, CaCO3, and CaSO4 deposits in industrial recycling water systems. The material exhibited 99% inhibition of Ca3(PO4)2 scale precipitation and 100% inhibition of CaSO4 deposits. In an attempt to control Ca3(PO4)2, CaCO3, and CaSO4 deposits in industrial recycling water systems, Chinese researchers have synthesised an acrylic acid (AA)-allyloxy poly(ethylene glycol) polyglycerol carboxylate (APEG-PG-COOH) copolymer as a non-phosphorus inhibitor. The synthesised polymer was characterised by proton nuclear magnetic resonance (1H NMR), and the inhibition performance of PAA/APEG-PG-COOH on Ca3(PO4)2, CaCO3, and CaSO4 precipitation was studied through static scale inhibition tests. The researchers have shown that PAA/APEG-PG-COOH exhibits an excellent ability to control inorganic minerals, with approximately 100% CaSO4 inhibition and 99.89% Ca3(PO4)2 inhibition at levels of 3 and 6 mg/L of PAA/APEG-PG-COOH, respectively. PAA/APEG-PG-COOH also displayed the ability to prevent the formation of CaCO3 scales. The effects on formation of Ca3(PO4)2, CaCO3, and CaSO4 were investigated with a combination of scanning electronic microscopy (SEM), transmission electron microscopy (TEM), and X-ray powder diffraction (XRD) analysis, respectively. Source: filtsep