On the extraction with long-chain amines: XXII. The extraction of mercury(II) from HCl solutions by trilaurylamine dissolved in benzene as well as by benzene alone

M. Chimbóulev; E. Högfeldt

doi:10.1007/bf02516973

Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 30: Issue 2

On the extraction with long-chain amines

XXII. The extraction of mercury(II) from HCl solutions by trilaurylamine dissolved in benzene as well as by benzene alone

Authors:

M. Chimbóulev

M. Chimbóulev Royal Institute of Technology Department of Inorganic Chemistry S-100 44 Stockholm 70 (Sweden)

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and

E. Högfeldt

E. Högfeldt Royal Institute of Technology Department of Inorganic Chemistry S-100 44 Stockholm 70 (Sweden)

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Pages:: 397–409

Online Publication Date:: 09 Jan 2007

Publication Date:: 01 Sep 1976

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02516973

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Abstract

The extraction of tracer mercury(II) from aqueous HCl-solutions by TLA (trilaurylamine) dissolved in benzene can simply be described by the reaction

\documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{upgreek} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} $$TLAHCl \cdot H_2 O(org) + HgCl_2 (aq) \rightleftharpoons TLAHCl \cdot HgCl_2 (org) + H_2 O(aq)$$ \end{document}

((1)) Using the chloride ion activity coefficient function recently introduced by HÖGFELDT

\documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{upgreek} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} $$\lg y_{Cl^ - } = - 0.5115 \sqrt I /(1 + 1.176 \sqrt I ) - \lg C_{corr}$$ \end{document}

((2)) together with the model for excess acid extraction developed by AGUILAR and HÖGFELDT, the only unknown quantity is the equilibrium constant for the reaction above since the stability constants for the formation of the Hg(II)-CT-complexes are also well known. Using distribution data for HgCl₂ (tracer) between HCl-solutions and benzene Eq. (2) gets further support as being a useful expression for the activity coefficient of Cl⁻ in solutions more concentrated than ≈0.6M. Some scouting experiments about the extraction of HgCl₂ from NaCl brines containing 270 g NaCl/l showed that in the pH-range 1–13 the best extraction was obtained at about pH 1–2 irrespective if the diluent was benzene, o-xylene or a mixture of kerosene and benzene.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)