Extraction of sulphuric acid by methyl diphenyl phosphate and tributyl phosphate

Alexander Apelblat

doi:10.1039/DT9730001198

Extraction of sulphuric acid by methyl diphenyl phosphate and tributyl phosphate

Alexander Apelblat

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Abstract

The extraction equilibria in the sulphuric acid-methyl diphenyl phosphate-water and sulphuric acid-tributyl phosphate-water systems were investigated. The activities of methyl diphenyl phosphate and tributyl phosphate were calculated in the range of aqueous 0-10M-H₂SO₄, with the aid of the Gibbs-Duhem relationship. The experimental data found are consistent with the formation of the [H(H₂O)₃(MePh₂PO₄)₄ ⁺] [HSO₄^-] complex with the equilibrium constant K = 2 × 10^-3(mol/kg MePh₂PO₄)^-1. At higher acid concentrations complete miscibility of MePh₂PO₄and H₂SO₄ is observed. At low concentrations of H₂SO₄, the acid is extracted by tributyl phosphate in the form of H₂SO₄(H₂O)₆(Bu₃PO ₄)₃ with K = 20 (mol/kg Bu₃Po₄)^-3. Some summarizing remarks on the extraction of HNO₃, HCl, and H₂SO₄ by MePh₂PO₄ and Bu₃PO₄ are also given.

Original language	English
Pages (from-to)	1198-1201
Number of pages	4
Journal	Journal of the Chemical Society. Dalton Transactions
Issue number	11
DOIs	https://doi.org/10.1039/DT9730001198
State	Published - 1 Dec 1973
Externally published	Yes

ASJC Scopus subject areas

General Chemistry

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title = "Extraction of sulphuric acid by methyl diphenyl phosphate and tributyl phosphate",

abstract = "The extraction equilibria in the sulphuric acid-methyl diphenyl phosphate-water and sulphuric acid-tributyl phosphate-water systems were investigated. The activities of methyl diphenyl phosphate and tributyl phosphate were calculated in the range of aqueous 0-10M-H2SO4, with the aid of the Gibbs-Duhem relationship. The experimental data found are consistent with the formation of the [H(H2O)3(MePh2PO4)4 +] [HSO4-] complex with the equilibrium constant K = 2 × 10-3(mol/kg MePh2PO4)-1. At higher acid concentrations complete miscibility of MePh2PO4and H2SO4 is observed. At low concentrations of H2SO4, the acid is extracted by tributyl phosphate in the form of H2SO4(H2O)6(Bu3PO 4)3 with K = 20 (mol/kg Bu3Po4)-3. Some summarizing remarks on the extraction of HNO3, HCl, and H2SO4 by MePh2PO4 and Bu3PO4 are also given.",

author = "Alexander Apelblat",

year = "1973",

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doi = "10.1039/DT9730001198",

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T1 - Extraction of sulphuric acid by methyl diphenyl phosphate and tributyl phosphate

AU - Apelblat, Alexander

PY - 1973/12/1

Y1 - 1973/12/1

N2 - The extraction equilibria in the sulphuric acid-methyl diphenyl phosphate-water and sulphuric acid-tributyl phosphate-water systems were investigated. The activities of methyl diphenyl phosphate and tributyl phosphate were calculated in the range of aqueous 0-10M-H2SO4, with the aid of the Gibbs-Duhem relationship. The experimental data found are consistent with the formation of the [H(H2O)3(MePh2PO4)4 +] [HSO4-] complex with the equilibrium constant K = 2 × 10-3(mol/kg MePh2PO4)-1. At higher acid concentrations complete miscibility of MePh2PO4and H2SO4 is observed. At low concentrations of H2SO4, the acid is extracted by tributyl phosphate in the form of H2SO4(H2O)6(Bu3PO 4)3 with K = 20 (mol/kg Bu3Po4)-3. Some summarizing remarks on the extraction of HNO3, HCl, and H2SO4 by MePh2PO4 and Bu3PO4 are also given.

AB - The extraction equilibria in the sulphuric acid-methyl diphenyl phosphate-water and sulphuric acid-tributyl phosphate-water systems were investigated. The activities of methyl diphenyl phosphate and tributyl phosphate were calculated in the range of aqueous 0-10M-H2SO4, with the aid of the Gibbs-Duhem relationship. The experimental data found are consistent with the formation of the [H(H2O)3(MePh2PO4)4 +] [HSO4-] complex with the equilibrium constant K = 2 × 10-3(mol/kg MePh2PO4)-1. At higher acid concentrations complete miscibility of MePh2PO4and H2SO4 is observed. At low concentrations of H2SO4, the acid is extracted by tributyl phosphate in the form of H2SO4(H2O)6(Bu3PO 4)3 with K = 20 (mol/kg Bu3Po4)-3. Some summarizing remarks on the extraction of HNO3, HCl, and H2SO4 by MePh2PO4 and Bu3PO4 are also given.

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U2 - 10.1039/DT9730001198

DO - 10.1039/DT9730001198

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SN - 1472-7773

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JO - Journal of the Chemical Society. Dalton Transactions

JF - Journal of the Chemical Society. Dalton Transactions

IS - 11

ER -

Extraction of sulphuric acid by methyl diphenyl phosphate and tributyl phosphate

Abstract

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