Claims
- 1. In a process for preparing organohalosilanes by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst and a co-catalyst,
the co-catalyst comprising a copper alloy powder of a co-catalyst active element alloyed with copper containing substantial strain energy.
- 2. The co-catalyst of claim 1 wherein the copper alloy powder is a copper alloy foil powder, stamped copper alloy powder or microscopic copper alloy powder.
- 3. The co-catalyst of claim 1 wherein the copper alloy is an alloy of copper with at least one element selected from the group consisting of zinc, tin, antimony, phosphorus and aluminum.
- 4. The co-catalyst of claim 1 which possesses the crystal lattice strain energy which relaxes at a temperature of up to 400° C., and has a specific surface area of 0.05 to 2.0 m2/g as measured by the BET or air-permeability method.
- 5. The co-catalyst of claim 4 which when heated in air, undergoes rapid surface oxidation concomitant with the relaxation of the strain energy.
- 6. The co-catalyst of claim 4 which on air flow differential thermal analysis, exhibits an incipient heat generation temperature of up to 400° C. with an exothermic value of 1 to 80 cal/g.
- 7. A process for preparing organohalosilanes, comprising the step of reacting metallic silicon particles with an organohalide in the presence of a copper catalyst and the co-catalyst of claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2001-110805 |
Apr 2001 |
JP |
|
Parent Case Info
[0001] This invention generally relates to a process for preparing organohalosilanes by reacting metallic silicon particles with an organohalide by Rochow method and more particularly, to a co-catalyst used in the process.