Process of extraction of a platinum group metal or gold from organic compositions with surfactants
First Claim
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1. A process of extraction of at least one metal chosen from the platinum group metals and gold from a first organic liquid composition comprising:
- at least one metal chosen from the platinum group metals and gold, andan organic solvent, said organic solvent being water immiscible,wherein said process comprises the following steps;
a) contacting said first organic liquid composition with a first aqueous solution comprising a surfactant to obtain after phase separation,a second aqueous solution comprising the at least one metal chosen from the platinum group metals and gold and the surfactant, anda second organic liquid composition comprising the organic solvent;
b) recovering of said second aqueous solution,said surfactant comprising;
an hydrophobic central core of valence m equal to 1, 2 or 3;
when m=1, a hydrophilic group G of the following formula, attached to the central core;
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Abstract
The present invention is in the field of surfactants to extract a platinum group metal or gold, in particular palladium, from organic compositions. In particular, the invention concerns the use of surfactants to back-extract a platinum group metal or gold, in particular palladium, from organic compositions further comprising an extractant of said platinum group metal or gold, in particular palladium from an aqueous solution.
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13 Claims
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1. A process of extraction of at least one metal chosen from the platinum group metals and gold from a first organic liquid composition comprising:
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at least one metal chosen from the platinum group metals and gold, and an organic solvent, said organic solvent being water immiscible, wherein said process comprises the following steps; a) contacting said first organic liquid composition with a first aqueous solution comprising a surfactant to obtain after phase separation, a second aqueous solution comprising the at least one metal chosen from the platinum group metals and gold and the surfactant, and a second organic liquid composition comprising the organic solvent; b) recovering of said second aqueous solution, said surfactant comprising; an hydrophobic central core of valence m equal to 1, 2 or 3; when m=1, a hydrophilic group G of the following formula, attached to the central core; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A process of extracting at least one metal chosen from the platinum group metals and gold from a liquid composition to an aqueous solution, said liquid composition comprising:
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at least one metal chosen from the platinum group metals and gold, and an organic solvent, said organic solvent being water immiscible, wherein the process further comprises contacting the liquid composition with a surfactant comprising; a hydrophobic central core of valence m equal to 1, 2 or 3; when m=1, a hydrophilic group G of the following formula, attached to the central core;
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12. A micelle or an aqueous solution comprising at least one metal chosen from the platinum group metals and gold and a surfactant as comprising:
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a hydrophobic central core of valence m equal to 1, 2 or 3; when m=1, a hydrophilic group G of the following formula, attached to the central core; - View Dependent Claims (13)
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Specification