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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 2    April 2003

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Synthesis of N-decyl-1,3-diaminopropanes and its flotation properties on aluminium silicate minerals
HU Yue-hua(胡岳华)1, CAO Xue-feng(曹学锋)1
LI Hai-pu(李海普)1, JIANG Yu-ren(蒋玉仁)1, DU Ping(杜 平)2

1. College of Resources Processing and Bio-Engineering,
 Central South University, Changsha 410083, China ; 
2. College of Chemistry and Chemical Engineering, 
Hunan Normal University, Changsha 410081, China

Abstract:N-decyl-1, 3-diaminopropanes (DNs) were synthesized from alkyl-amine acrylonitrile at ambient pressure. With the synthesized DNs as collectors, the flotation of kaolinite, pyrophyllite and illite was conducted and the results were interpreted in terms of the structure-activity relationship. The DNs are found to be more effective collectors than dodecyl amine, exhibiting the highest recovery over a pH range of 4-6. Among the DNs examined, DN12 shows the highest flotation efficiency. The flotation mechanisms were explained in view of the structures of reagents and aluminium silicate minerals. It is demonstrated that DNs can become new selective collectors for reverse floatation to remove aluminium silicate minerals from bauxite.

 

Key words:  N-decyl-1, 3-diaminopropane; synthesis; aluminosilicate; reverse floatation; structure-reactivity relationship

ISSN 1672-7029
CN 43-1423/U

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