Preparation of solid precious metal sensitizing compositions

Details Preparation of solid precious metal sensitizing compositions Preparation of solid precious metal sensitizing compositions

B - Operations, Transporting

01

J

252/84

B01J 23/38 (2006.01)

Patent

CA 1119150

ABSTRACT OF THE DISCLOSURE Method for the preparation of solid compositions soluble in aqueous media to produce clear sensitizing solutions for rendering surfaces receptive to the deposition of an adherent electroless metal comprise (i) precipitating a composition con- sisting of (a) a compound of an ion of a precious metal selected from a group consisting of the precious metals of the fifth and sixth periods of Groups VIII and IB of the Periodic Table of Elements, (b) a compound of a Group IV metal of the Periodic Table of Elements which is capable of two valence states and (c) a com- pound of an anion capable of forming a stable moiety with both valence states of the Group IV metal. Precipitation is from aqueous solution at an elevated pH or by cooling a hot saturated solution or melt. This divisional application is particularly directed to an alternative method in which the solid composition is formed by intimately blending the components in dry form. The compounds per se and methods for their use are also disclosed.

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