Extraction of nitric acid and hydrochloric acid by methyl diphenyl phosphate

A. Apelblat

doi:10.1039/J19710003459

Extraction of nitric acid and hydrochloric acid by methyl diphenyl phosphate

A. Apelblat

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The extraction of HNO₃ and HCl by methyl diphenyl phosphate is compared with the corresponding systems involving tributyl phosphate. The activity of methyl diphenyl phosphate was calculated over the range of aqueous 0-14M-HNO₃ and 0-9M-HCl by use of the Gibbs-Duhem relationship. Nitric acid is extracted primarily in the form of the undissociated complex HNO₃,H₂O,MePh₂PO₄, while the hydrochloric acid complex HCl,2H₂O,2MePh₂PO₄ is partly dissociated in the organic phase. The equilibrium constants for complex formation were estimated to be K = 0·4 (mol/kg MePh₂PO ₄)^-1 and 9 × 10^-4 for HNO₃ and HCl, respectively. In both cases the standard reaction entropy is the dominating term in the standard change of free energy ΔG°.

Original language	English
Pages (from-to)	3459-3463
Number of pages	5
Journal	Journal of the Chemical Society A: Inorganic, Physical, and Theoretical Chemistry
DOIs	https://doi.org/10.1039/J19710003459
State	Published - 1 Jan 1971
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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abstract = "The extraction of HNO3 and HCl by methyl diphenyl phosphate is compared with the corresponding systems involving tributyl phosphate. The activity of methyl diphenyl phosphate was calculated over the range of aqueous 0-14M-HNO3 and 0-9M-HCl by use of the Gibbs-Duhem relationship. Nitric acid is extracted primarily in the form of the undissociated complex HNO3,H2O,MePh2PO4, while the hydrochloric acid complex HCl,2H2O,2MePh2PO4 is partly dissociated in the organic phase. The equilibrium constants for complex formation were estimated to be K = 0·4 (mol/kg MePh2PO 4)-1 and 9 × 10-4 for HNO3 and HCl, respectively. In both cases the standard reaction entropy is the dominating term in the standard change of free energy ΔG°.",

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N2 - The extraction of HNO3 and HCl by methyl diphenyl phosphate is compared with the corresponding systems involving tributyl phosphate. The activity of methyl diphenyl phosphate was calculated over the range of aqueous 0-14M-HNO3 and 0-9M-HCl by use of the Gibbs-Duhem relationship. Nitric acid is extracted primarily in the form of the undissociated complex HNO3,H2O,MePh2PO4, while the hydrochloric acid complex HCl,2H2O,2MePh2PO4 is partly dissociated in the organic phase. The equilibrium constants for complex formation were estimated to be K = 0·4 (mol/kg MePh2PO 4)-1 and 9 × 10-4 for HNO3 and HCl, respectively. In both cases the standard reaction entropy is the dominating term in the standard change of free energy ΔG°.

AB - The extraction of HNO3 and HCl by methyl diphenyl phosphate is compared with the corresponding systems involving tributyl phosphate. The activity of methyl diphenyl phosphate was calculated over the range of aqueous 0-14M-HNO3 and 0-9M-HCl by use of the Gibbs-Duhem relationship. Nitric acid is extracted primarily in the form of the undissociated complex HNO3,H2O,MePh2PO4, while the hydrochloric acid complex HCl,2H2O,2MePh2PO4 is partly dissociated in the organic phase. The equilibrium constants for complex formation were estimated to be K = 0·4 (mol/kg MePh2PO 4)-1 and 9 × 10-4 for HNO3 and HCl, respectively. In both cases the standard reaction entropy is the dominating term in the standard change of free energy ΔG°.

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Extraction of nitric acid and hydrochloric acid by methyl diphenyl phosphate

Abstract

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