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Solvent Extraction and Ion Exchange Volume 13, 1995 - Issue 2
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Original Articles

SECONDARY EFFECTS ASSOCIATED WITH THE FUNCTIONING OF BULKY SUBSTITUTED AMMONIUM CATIONS — REVISED INTERPRETATIONS.

J.G.H. du Preez Research Unit for Metal Ion Separation, (previously, Uranium Chemistry Research Unit) University of Port Elizabeth, P O Box 1600, Port Elizabeth, 6000, Republic of South AfricaView further author information
,
DP. Shillington Research Unit for Metal Ion Separation, (previously, Uranium Chemistry Research Unit) University of Port Elizabeth, P O Box 1600, Port Elizabeth, 6000, Republic of South Africa
,
E. Herselman Research Unit for Metal Ion Separation, (previously, Uranium Chemistry Research Unit) University of Port Elizabeth, P O Box 1600, Port Elizabeth, 6000, Republic of South Africa
,
H.E. Rohwer Research Unit for Metal Ion Separation, (previously, Uranium Chemistry Research Unit) University of Port Elizabeth, P O Box 1600, Port Elizabeth, 6000, Republic of South Africa
,
B. J A. M. van Brecht Research Unit for Metal Ion Separation, (previously, Uranium Chemistry Research Unit) University of Port Elizabeth, P O Box 1600, Port Elizabeth, 6000, Republic of South Africa
&
H. Wilke Research Unit for Metal Ion Separation, (previously, Uranium Chemistry Research Unit) University of Port Elizabeth, P O Box 1600, Port Elizabeth, 6000, Republic of South Africa
Pages 189-214 | Published online: 27 Apr 2007
 
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ABSTRACT

The behaviour of mono and diquaternary ammonium cations during extraction and precipitation of CoCI4 2 ions is used to clarify some aspects of the secondary effects present during their operation. A quantitative treatment of the “HCI effect” is offered. It is illustrated that this effect must be ascribed to a lowering of the activity of the cation rather than formation of undissociated acid species like H2CoCI4

Additional information

Notes on contributors

J.G.H. du Preez

To whom correspondence should be addressed

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Related Research Data

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