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Scale deposit inhibitor for kraft digesters and method for controlling scale deposition in kraft digesters
Scale deposit inhibitor for kraft digesters and method for controlling scale deposition in kraft digesters
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机译:用于牛皮纸蒸煮器的水垢沉积抑制剂和控制牛皮纸蒸煮器中水垢沉积的方法
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摘要
A scale deposit inhibitor and a method for continuously controlling scale deposition applicable to a digester and its peripheral equipment used in kraft pulp manufacture are disclosed, the scale deposit inhibitor comprising a maleic acid-acrylic acid-hypophosphorous acid terpolymer having a maleic acid unit to acrylic acid unit molar ratio of 1:4 to 4:1, a hypophosphorous acid unit content of 1 to 12 mol %, and a weight average molecular weight of 500 to 10000. The scale deposit inhibitor is added to a cooking liquor in a concentration of 0.01 to 10 ppm per ppm of a calcium ion in the cooking liquor.
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