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γ-alkoxy-propylamines, C12 H25 O(CH2 )3 NH2, C14 H29 O(CH2)3 NH2, C16 H33 O(CH2)3 NH2, C18 H37 O-(CH2)3NH2 were synthesized from aliphatic alcohol and acrylonitrile. The flotation tests of kaolinite, pyrophyllite and illite were conducted. The flotation m