Process for the Preparation of Palladium Intermetallic Compounds and Use of the Compounds to Prepare Organohalosilanes

摘要

Palladium intermetallic compounds, such as palladium silicides, e.g., PdSi and/or Pd2Si, can be selectively prepared in a two step process including the steps of (1) vacuum impregnating silicon with a metal halide comprising a palladium halide, and (2) ball milling the product of step (1). A method of preparing organohalosilanes may be performed combining an organohalide having the formula RX, where R is a hydrocarbyl group having 1 to 10 carbon atoms and X is a halogen atom, with a contact mass comprising at least 2% of the palladium intermetallic compound.

主权项

1. A process comprises:
(1) vacuum impregnating a metal halide on silicon, where the metal halide comprises a palladium halide of formula PdX′2, where each X′ is independently a halogen atom, thereby producing a mixture comprising PdzSiwX′zq, where z represents a molar amount of Pd, w represents a molar amount of Si and zq represents a molar amount of the halogen atoms in the mixture; and (2) mechanochemically processing the mixture under an inert atmosphere, thereby producing a redox reaction product comprising
(i) an intermetallic compound of formula PdzSi(w−y/4)X′(zq−y)where y represents a molar amount of halogen atom removed from the mixture during step (2), and y