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Liquid extraction of rhenium(VII) and molybdenum(VI) with trialkylphosphine oxide from acidic solutions

V.F. Travkin, A Palant

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Abstract

The liquid extraction of rhenium(VII) and molybdenum(VI) ions from sulfuric, hydrochloric, and nitric acid media is studied in the temperature range from 20 to 40°C using trialkylphosphine oxide in kerosene as an extracting agent. The maximum separation of these metals is attained when they are extracted from solutions of 1.0–2.0 M H 2 SO 4 (the duration of intense phase mixing was 3–5 min). The enthalpy of the studied process is estimated to be Δ H = −32.32 kJ/mol for molybdenum and −51.52 kJ/mol for rhenium. The chemical aspects of the extraction process studied are discussed.

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What this paper is about

The liquid extraction of rhenium(VII) and molybdenum(VI) ions from sulfuric, hydrochloric, and nitric acid media is studied in the temperature range from 20 to 40°C using trialkylphosphine oxide in kerosene as an extracting agent. The maximum separation of these metals is attained when they are extracted from solutions of 1.0–2.0 M H 2 SO 4 (the duration of intense phase mixing was 3–5 min). The enthalpy of the studied process is estimated to be Δ H = −32.32 kJ/mol for molybdenum and −51.52 kJ/mol for rhenium. The chemical aspects of the extraction process studied are discussed.

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Available abstract

The liquid extraction of rhenium(VII) and molybdenum(VI) ions from sulfuric, hydrochloric, and nitric acid media is studied in the temperature range from 20 to 40°C using trialkylphosphine oxide in kerosene as an extracting agent. The maximum separation of these metals is attained when they are extracted from solutions of 1.0–2.0 M H 2 SO 4 (the duration of intense phase mixing was 3–5 min). The enthalpy of the studied process is estimated to be Δ H = −32.32 kJ/mol for molybdenum and −51.52 kJ/mol for rhenium. The chemical aspects of the extraction process studied are discussed.

Key concepts: Rhenium, Chemistry, Molybdenum, Extraction (chemistry), Inorganic chemistry, Kerosene, Sulfuric acid, Hydrochloric acid

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Liquid extraction of rhenium(VII) and molybdenum(VI) with trialkylphosphine oxide from acidic solutions — Research Paper | ScholarLens