Patent ID: 8395003
Filing Date: 2013-03-12
Classification: B01J,B22F,B82Y,C07C

Abstract:
1. A suspension of metal nanoparticles with a mean size of between 1 and 20 nanometers, in at least one non-aqueous ionic liquid, wherein said suspension also contains at least one nitrogen-containing ligand, in which said metal nanoparticles comprise at least one transition metal in a zero valence state selected from among rhodium, ruthenium, iridium, nickel, and platinum by themselves or in a mixture and in which said nitrogen-containing ligand is selected from the group that is formed by linear compounds that comprise at least one nitrogen atom, non-aromatic cyclic compounds comprising at least one nitrogen atom, non-condensed aromatic compounds comprising at least one nitrogen atom, condensed aromatic compounds comprising at least one group of two aromatic cycles that are condensed two by two, and at least one nitrogen atom, condensed aromatic compounds comprising at least 3 aromatic cycles and 1 nitrogen atom, and condensed aromatic compounds comprising at least 3 aromatic cycles and at least 2 nitrogen atoms that are located in the same aromatic cycle, and the molar ratio between said at least one nitrogen-containing ligand and said transition metal is strictly less than 1.