Organic-inorganic hybrid material for the selective extraction of gold and platinum group metals, associated extraction and recovery processes

Abstract

The present invention relates to an organic-inorganic hybrid material comprising metal oxide particles bonded to at least one first compound corresponding to the following general formula (I): [Chem 1] [H2O3P-Zp-(CH2)m-Z'q-(Y)n-(CH2)m-Zp-PO3H2] (I) in which - m represents an integer such that 0 ≤ m ≤ 50, - n represents an integer such that 0 ≤ n ≤ 100, - p represents an integer equal to 0 or 1, - q represents an integer equal to 0 or 1, at least one of m, n, p and q being different from 0, - Y is chosen from the group consisting of CH2CH2O, CH2CH2 and CF2CF2, - Z is chosen from the group consisting of O, NH and CH2, and - Z' is O.The present invention also relates to a specific organic-inorganic hybrid material comprising metal oxide particles bonded to at least a first compound and at least a second compound, as well as to extraction and recovery processes, particularly for gold and platinum group metals, employing this specific organic-inorganic hybrid material. Figure for abstract: No figure.