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The synthesis of flotation collectors for cassiterite

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Lane, G S(Gregory Searle) (1986) The synthesis of flotation collectors for cassiterite. Research Master thesis, University of Tasmania.

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Abstract

Aryl-substituted polycarboxylic acids and aryl-substituted
phosphonocarboxylic acids (including polyphosphono/polycarboxylic acids) were synthesised using new and known
techniques. These acids were prepared for evaluation as
potential collectors and have been assessed by Aberfoyle
Resources Pty. Ltd., for use in the flotation of cassiterite and
other metal oxides. The acids represent a new structural group
of collectors for use in this field. The structural
chemical-physical features of the acids have been correlated
with the flotation results obtained to optimise collector
design.
Synthesis of the aryl-substituted polycarboxylic acids was
carried out via established methodology to obtain thirty seven
such acids, containing from one to four carboxylic acid
functionalities per molecule. Various para-substituents were
included to investigate the effect of both the hydrophilic and
hydrophobic entities within the compounds on collector
efficiency based on grade and net recovery of cassiterite. Some
of these acids, notably some of the
2-(4-substitutedphenyl)propane-1,1,3-tricarboxylic acids, had
not been reported previously in the literature.
The aryl-substituted phosphonocarboxylic acids prepared
possessed similar structural characteristics to the acids above,
with one or more of the carboxylic acid groups being replaced by
phosphonic acid functionalities. Previously prepared acids of
this class were, in general, poorly characterised prior to this
work or not found in the literature. In this work particular use has been made of N.M.R. spectroscopy ( P31, C13, H 1) to elucidate
and confirm the structure of the proposed collectors.
The flotation results for the two classes of collectors have been compared and contrasted, and some structure-collector
property relationships proposed. In general the new classes of
collectors were found to be far superior to those collectors in
current commercial use.

Item Type: Thesis (Research Master)
Keywords: Organic acids, Cassiterite, Metallic oxides
Copyright Holders: The Author
Copyright Information:

Copyright 1986 the Author - The University is continuing to endeavour to trace the copyright
owner(s) and in the meantime this item has been reproduced here in good faith. We
would be pleased to hear from the copyright owner(s).

Additional Information:

Thesis (M. Sc.)-- University of Tasmania, 1987

Date Deposited: 19 Dec 2014 02:28
Last Modified: 11 Mar 2016 05:56
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