| 摘要 |
An improved water treating composition comprising about 45 to 85 percent alkali metal hexametaphosphate, about 5 to 35 percent alkali metal pyrophosphate, and about 3 to 30 percent di-alkali metal orthophosphate. The preferred composition is a 70-20-10 composition, containing 70 percent sodium hexametaphosphate, about 20 percent sodium hydrogen pyrophosphate, and about 10 percent dipotassium orthophosphate. The invention also provides a method for treating water which comprises adding the foregoing compositions to water at levels of about 0.5 to 20 ppm.
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