Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Patent
1992-05-28
1993-10-05
Prescott, Arthur C.
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
25218232, 502243, C07F 704
Patent
active
052507165
ABSTRACT:
A method of preparing an active silicon/copper contact mass for the direct reaction of organic halides with silicon to make organohalosilanes by contacting a particle size distribution of silicon with a copper catalyst vapor, aerosol or a combination of vapor and aerosol. The copper catalyst aerosol can be produced by rapid nucleation of the vapor, by an exothermic reaction between copper metal and chlorine gas or by ultrasonic energy dispersion of a solution of a copper compound to a fine mist consisting of extremely fine particles 0.1 to 0.01 micron or smaller. The preferred copper catalyst is copper chloride. The small, sub-micron size copper chloride aerosol provides an efficient utilization of copper to form the active Cu-Si alloys on the silicon particles' surfaces. Also disclosed in a new, integrated production process which consists of methods to produce the copper chloride aerosol and feeding the aerosol into various mechanical mixing devices in which a particle size distribution of silicon can thoroughly make contact with the aerosol to form the active contact mass in one step.
REFERENCES:
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patent: 4762940 (1988-08-01), Halm et al.
patent: 5015751 (1991-05-01), Feldner et al.
Nitkin William
Prescott Arthur C.
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