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US 9,994,458 B2Granted
Process for the preparation and/or purification of ruthenium(III) chloride
AssigneesHeraeus Deutschland GmbH & Co. KG, Heraeus South Africa (Pty.) Ltd.
InventorsChristian Mock, David Fife, Waldo Van Tonder, Albert Joubert, Walter Lässig
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Abstract
The present invention relates to a process for the preparation of ruthenium(III) chloride (RuCl3) as well to a process for the purification of ruthenium(III) chloride (RuCl3) and a use of the process for the preparation or the purification of ruthenium(III) chloride (RuCl3).
Claims12
A process for the preparation of ruthenium(III) chloride (RuCl3), the process comprising at least the steps of:
- a) providing a hydrochloric acid solution,
- b) providing at least one ruthenium salt:
- (X)y[RuCl6]2− or (X)y[RuCl6]3−
- wherein X is a monovalent, divalent or trivalent cation and y is 1, 2 or 3,
- c) combining the hydrochloric acid solution of step a) and the at least one ruthenium salt of step b) and heating the obtained mixture to a temperature T of ≥70° C.,
- d) adjusting the pH of the mixture obtained in step c) to a pH from 0 to 2, and
- e) passing a mixture obtained in step d) through a cation exchanger to obtain a solution comprising ruthenium(III) chloride (RuCl3).
4 more elements
A process for the purification of ruthenium(III) chloride (RuCl3), the process comprising at least the steps of:
- a) providing a hydrochloric acid solution,
- b) providing ruthenium(III) chloride in dry form or in a form of a solution, wherein the ruthenium(III) chloride comprises impurities,
- c) combining the hydrochloric acid solution of step a) and the ruthenium(III) chloride of step b) and heating the obtained mixture to a temperature T of ≥70° C.,
- d) adjusting the pH of the mixture obtained in step c) to a pH from 0 to 2, and
- e) passing a mixture obtained in step d) through a cation exchanger to obtain a solution comprising ruthenium(III) chloride (RuCl3).
2 more elements
Dependencies are inferred from the claim text.