Abstract
AbstractThe title monomers have been grafted onto wheat starch by γ‐radiation‐induced polymerization in water providing three graft polymers containing poly[2‐hydroxy‐3‐methacryloyloxypropyltrimethylammonium chloride (I)] and two graft polymers containing poly[I and acrylamide (II)]. Characterization is discussed together with their utility as silica depressants in flotation‐beneficiation of siliceous ores. Results are provided to illustrate that a starch graft copolymer containing 15% poly(I) graft and a graft terpolymer containing 30% poly(I, II) in the ratio 1:2 are effective as selective depressants for silica in flotation‐beneficiation of Florida pebble phosphate ore using special flotation conditions.
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