Studies of collectors. Part 12. The flotation of gallium ion with polyphenol-type surfactants
- 1 January 1990
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 2,p. 641-645
- https://doi.org/10.1039/dt9900000641
Abstract
Polyphenol-type surfactants bearing 1,2-benzenediol or 1,2,3-trihydroxybenzene units were prepared and applied as flotation collectors for Ga3+. The surfactants exhibited a lowering of surface tension at pH 11 (32–47 dyn cm–1. Gallium(III) was highly floated (80–90%) at pH 3–8 with equimolar Cn– 1H2n– 1C(O)C6H3(OH)2(n= 8 or 12) or C7H15C(O)C6H2(OH)3, but not as highly (60%) with C12H25S[CH2CHC(O)C6H3(OH)2]4.8(CH2CHCO2H)9.5H. The floatabilities of Ga3+ in 1 mol dm–3 NaOH were 86–99%, those in 3 mol dm–3 NaOH were 63–67%, and those in 5 mol dm–3 NaOH were 26–39% by using a six-fold molar excess of Cn– 1H2n– 1C(O)C6H3(OH)2(n= 12 or 18). On the other hand, the floatabilities from 1–5 mol dm–3 NaOH solutions when Cn– 1H2n– 1C(O)C6H2(OH)3 was added were nearly constant (58–59% with n= 12 and 31–35% with n= 18). The Ga3+ in a Ga3+–Al3+ mixture was floated selectively at pH 3–5 by using C7H15C(O)C6H3(OH)2 or C7H15C(O)C6H2(OH)3. Moreover, the polyphenol-type surfactants in these flotation systems were almost entirely absent (–5 mol dm–3) from 3–5 mol dm–3 NaOH solutions and little decomposed.This publication has 0 references indexed in Scilit: