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Synthesis of N,N-diethyl dodecyl amine and its flotation properties on bauxite

Synthesis of N,N-diethyl dodecyl amine and its flotation properties on bauxite
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摘要 N, N-diethyl dodecyl amine(DEN12) was synthesized from dodecyl amine, formic acid and acetic aldehyde. The collecting property of DENI2 on diaspore, kaolinite and illite was investigated by flotation test and infrared spectrum. The results show that in the presence of 2.0× 10^-4 mol/L DEN12, the recoveries of kaolinite and illite are all higher than 78% and the recovery of diaspore is 50% in the pH range of 5.5-6.0. The mass ratio of A1203 to SiO2 in concentrate obtained from separation artificial mixture is higher than 10, suggesting that DEN12 can be used as a collector to separate the aluminosilicates from diaspore in bauxite ores at the pulp pH below 8. The measurements of the infrared spectrum approve that the action between aluminosilicates and tertiary amine collector is strong electrostatic adsorption and that of diaspore is weak electrostatic adsorption. N,N-diethyl dodecyl amine(DEN12) was synthesized from dodecyl amine,formic acid and acetic aldehyde.The collecting property of DEN12 on diaspore,kaolinite and illite was investigated by flotation test and infrared spectrum.The results show that in the presence of 2.0×10-4 mol/L DEN12,the recoveries of kaolinite and illite are all higher than 78% and the recovery of diaspore is 50% in the pH range of 5.5-6.0.The mass ratio of Al2O3 to SiO2 in concentrate obtained from separation artificial mixture is higher than 10,suggesting that DEN12 can be used as a collector to separate the aluminosilicates from diaspore in bauxite ores at the pulp pH below 8.The measurements of the infrared spectrum approve that the action between aluminosilicates and tertiary amine collector is strong electrostatic adsorption and that of diaspore is weak electrostatic adsorption.
出处 《Journal of Central South University of Technology》 EI 2008年第2期188-192,共5页 中南工业大学学报(英文版)
基金 Project(2005CB623701) supported by the Major State Basic Research Development Program of China
关键词 reverse flotation electrostatic adsorption infrared spectrum kaolinite ILLITE DIASPORE N N-diethyl-N-dodecyl amine(DENI2) 反浮选 静电吸附作用 红外线光普法 伊利石 DENI2
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