Title:
COMBINATION PREPARATION PROCESS AND COMBINATION PREPARATION SYSTEM FOR ZIRCONIA AND METHYLCHLOROSILANE AND/OR POLYSILICON
Document Type and Number:
WIPO Patent Application WO/2020/119522
Kind Code:
A1
Abstract:
Provided are a combination preparation process and a combination preparation system for zirconia and methylchlorosilane and/or polysilicon. The process comprises: using zircon sand, carbon as a reducing agent, chlorine gas, silicon as a heating supplementation agent, and hydrogen chloride as raw materials to prepare zirconia, wherein a product separated during the preparation of zirconia comprises a gas phase substance and a liquid phase substance; and the gas phase substance separated during the preparation of zirconia is used as a raw material to prepare methylchlorosilane, and the liquid phase substance is used as a raw material to prepare polysilicon. In the present invention, not only are waste gases, such as carbon monoxide and hydrogen chloride, which are produced during the preparation of zirconia, used as raw materials to prepare methylchlorosilane, but a by-product, silicon tetrachloride, which is produced during the preparation of zirconia, is used as a raw material to prepare polysilicon, thereby effectively recycling the waste gases and silicon tetrachloride, said recycling having a high value, reducing the treatment cost of the waste gases and the silicon tetrachloride, and preventing environmental pollution, and also reducing the production cost of methylchlorosilane and polysilicon, improving the process level, and improving the overall economic benefit.
Inventors:
YIN BO (CN)
HUANG BIN (CN)
FAN XIECHENG (CN)
CHEN GUOHUI (CN)
WU ZHUFENG (CN)
LIU XINGPING (CN)
HUANG BIN (CN)
FAN XIECHENG (CN)
CHEN GUOHUI (CN)
WU ZHUFENG (CN)
LIU XINGPING (CN)
Application Number:
PCT/CN2019/122688
Publication Date:
June 18, 2020
Filing Date:
December 03, 2019
Export Citation:
Assignee:
XINTE ENERGY CO LTD (CN)
XINJIANG JINGSHUO NEW MAT CO LTD (CN)
XINJIANG JINGSHUO NEW MAT CO LTD (CN)
International Classes:
C07F7/16; C01G25/02
Foreign References:
| CN108557880A | 2018-09-21 | |||
| CN104817110A | 2015-08-05 | |||
| CN105540660A | 2016-05-04 | |||
| GB815425A | 1959-06-24 |
Attorney, Agent or Firm:
TEE & HOWE INTELLECTUAL PROPERTY ATTORNEYS (CN)
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