Process for treating a material containing inorganic matter

B - Operations – Transporting – 09 – B

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B09B 3/00 (2006.01) C25C 3/06 (2006.01) A62D 3/00 (2006.01)

Patent

CA 2202515

The present invention relates to a process for reducing and/or removing inorganic matter from a material containing inorganic matter which comprises the steps of: (i) a) treating the material with a source of hydrogen fluoride so as to form a first residue and a first solution containing inorganic matter; b) separating the first residue from the first solution containing the inorganic matter; c) treating the first residue with an acid so as to form a second residue and a second solution containing further inorganic matter; and d) separating the second residue from the second solution containing the further inorganic matter; or (ii) a) treating the material with an acid so as to form a first residue and a first solution containing inorganic matter; b) separating the first residue from the first solution containing the inorganic matter; c) treating the first residue with a source of hydrogen fluoride so as to form a second residue and a second solution containing further inorganic matter; and d) separating the second residue from the second solution containing the further inorganic matter.

La présente invention, portant sur un procédé de réduction de la quantité de matière inorganique d'un matériau en contenant et/ou de leur élimination, comprend les étapes suivantes: (i) a) traitement du matériau au moyen d'une source de fluorure d'hydrogène, de manière à obtenir un premier résidu et une première solution contenant des matières inorganiques; b) séparation de ce résidu de la première solution contenant les matières inorganiques; c) traitement de ce premier résidu au moyen d'un acide afin d'en constituer un second et d'obtenir une seconde solution contenant d'autres matières organiques; d) séparation du second résidu de la seconde solution contenant les autres matières organiques; ou bien (ii) a) traitement du matériau au moyen d'un acide, de manière à obtenir un premier résidu et une première solution contenant des matières inorganiques; b) séparation de ce premier résidu de la première solution contenant les matières inorganiques; c) traitement de ce premier résidu au moyen d'une source de fluorure d'hydrogène afin d'en constituer un second et d'obtenir une seconde solution contenant d'autres matières organiques; et d) séparation du second résidu de la seconde solution contenant les autres matières organiques.

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