Title:
FLUIDIZED BED REACTOR FOR PRODUCTION OF GRANULAR POLYCRYSTALLINE SILICON
Document Type and Number:
WIPO Patent Application WO/2019/037850
Kind Code:
A8
Abstract:
The invention relates to a fluidized bed reactor for the production of granular polycrystalline silicon. The fluidized bed reactor comprises a segmented reactor pipe arranged between a reactor head and a reactor floor, a heating device, at least one nozzle for supplying fluidization gas, at least one nozzle for supplying reaction gas, a device for supplying silicon seed particles, a product extraction line, and an exhaust extraction line. The reactor pipe comprises a base segment and at least one spacer segment, wherein a flat seal made of a material containing carbon is arranged between the base segment and spacer segment and wherein the spacer segment consists of a material having a thermal conductivity of < 2 W/mK in a temperature range from 100 to 950 °C. The invention further relates to a method for producing granular polycrystalline silicon in such a fluidized bed reactor.
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Inventors:
PEDRON SIMON (DE)
BAUMANN BERNHARD (DE)
FORSTPOINTNER GERHARD (DE)
BAUMANN BERNHARD (DE)
FORSTPOINTNER GERHARD (DE)
Application Number:
PCT/EP2017/071258
Publication Date:
May 02, 2019
Filing Date:
August 23, 2017
Export Citation:
Assignee:
WACKER CHEMIE AG (DE)
International Classes:
C01B33/027; B01J8/18
Attorney, Agent or Firm:
POTTEN, Holger et al. (DE)
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