Process for preparing highly pure silicon granules

Details Process for preparing highly pure silicon granules Process for preparing highly pure silicon granules

1998-08-07

1999-12-28

Dudash, Diana

Coating processes

Particles, flakes, or granules coated or encapsulated

Solid encapsulation process utilizing an emulsion or...

427215, 427219, 427553, 427557, 427255, 427314, B05D 700

Patent

active

060078693

ABSTRACT:
A process for preparing silicon granules with a chlorine contamination below 50 ppm by weight by deposition of elemental silicon on silicon particles in a fluidized-bed reactor. This reaction has a heating zone below a reaction zone. The silicon particles, in the heating zone, are fluidized by means of an inert silicon-free carrier gas to produce a fluidized bed and are heated by means of microwave energy. The silicon particles are reacted within the reaction zone, a reaction gas made up of a silicon source gas and the carrier gas. The average temperature of the reaction gas in the reaction zone, while the gas is perfusing the fluidized silicon particles, is maintained at less than 900.degree. C. The average temperature of the fluidized silicon particles in the reaction zone, while they are being perfused by the reaction gas, is maintained at greater than 900.degree. C.

REFERENCES:
patent: 3012862 (1961-12-01), Bertrand et al.
patent: 4292344 (1981-09-01), McHale
patent: 4416913 (1983-11-01), Ingle et al.
patent: 4786477 (1988-11-01), Yoon et al.
patent: 4900411 (1990-02-01), Poong et al.
patent: 5077028 (1991-12-01), Age
patent: 5260538 (1993-11-01), Clary et al.
patent: 5374413 (1994-12-01), Kim et al.
patent: 5382412 (1995-01-01), Kim et al.
patent: 5798137 (1998-08-01), Lord et al.
Perry's Chemical Engineers' Handbook, 6th ed., Green ed., McGraw-Hill, New York, 1984.
Patent Abstracts of Japan, vol. 013, vol. 515 (C-655), & JP 01 208311 A (Mitsubishi Metal Corp.).
Patent Abstracts of Japan, vol. 0151 No. 488 (C-0893), & JP 03 215310 A (Osaka Titanium Co. Ltd.).

Affiliated with

Also associated with

Rating

Process for preparing highly pure silicon granules does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing highly pure silicon granules, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing highly pure silicon granules will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2380729