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

N, N-diethyl dodecyl amine(DEN 12 ) was synthesized from dodecyl amine, formic acid and acetic aldehyde. The collecting property of DEN 12 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 DEN 12 , the...

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Bibliographic Details
Published in:Journal of Central South University of Technology. Science & technology of mining and metallurgy 2008-04, Vol.15 (2), p.188-192
Main Authors: Cao, Xue-feng, Zhang, Li-min, Hu, Yue-hua, Liu, Chang-miao, Ouyang, Kui
Format: Article
Language:English
Subjects:
Engineering
Metallic Materials
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Summary:N, N-diethyl dodecyl amine(DEN 12 ) was synthesized from dodecyl amine, formic acid and acetic aldehyde. The collecting property of DEN 12 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 DEN 12 , 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 Al 2 O 3 to SiO 2 in concentrate obtained from separation artificial mixture is higher than 10, suggesting that DEN 12 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.
ISSN:1005-9784
1993-0666
DOI:10.1007/s11771-008-0036-5