Title:
METHOD FOR REMOVING IMPURITIES FROM MG-SI USING ACID LEACHING FOR PRODUCING SILICON FOR SOLAR BATTERIES
Document Type and Number:
WIPO Patent Application WO/2012/002665
Kind Code:
A2
Abstract:
The present invention relates to a method for removing impurities from MG-Si using acid leaching for producing silicon for solar batteries. The present invention relates to a method for removing impurities from MG-Si using an acid leaching process, comprising the following processes: preparing a vessel selected from among a Pyrex beaker, a carbon vessel, an Al2O3 vessel, a Teflon vessel and an MgO vessel having high abrasion resistance to an acid solution; providing the prepared vessel with one or more acid solutions selected from HCl, HNO3, H2SO4, and HF which does not corrode MG-Si silicon; providing, to the inside of the vessel in which the acid solutions are provided, MG-Si such that the weight ratio of the silicon and acid solutions satisfies the ratio of 1:0.5 to 2; and keeping the MG-Si in the vessel at a preset temperature for a preset period of time, thereby removing impurities at an ion state from Si, wherein the impurities result from the interfacial reaction between the acid solutions and Si.
Inventors:
MIN, Dong Joon (1 Lotte Apt, Samseong 2-dong Gangnam-gu, Seoul 135-863, 135-863, KR)
민동준 (서울특별시 강남구 삼성2동 롯데아파트 101동 1404호, 135-863 Seoul, 135-863, KR)
민동준 (서울특별시 강남구 삼성2동 롯데아파트 101동 1404호, 135-863 Seoul, 135-863, KR)
Application Number:
KR2011/004517
Publication Date:
January 05, 2012
Filing Date:
June 21, 2011
Export Citation:
Assignee:
INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YOUNSEI UNIVERSITY (Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, 120-749, KR)
연세대학교 산학협력단 (서울특별시 서대문구 신촌동 134 연세대학교, 120-749 Seoul, 120-749, KR)
RENEW ENERGY CO., LTD. (4F Gamryeong Bldg, 153-29 Samseong-dong, Gangnam-gu, Seoul 135-878, 135-878, KR)
㈜리뉴에너지 (서울특별시 강남구 삼성동 153-29 감령빌딩 4층, 135-878 Seoul, 135-878, KR)
연세대학교 산학협력단 (서울특별시 서대문구 신촌동 134 연세대학교, 120-749 Seoul, 120-749, KR)
RENEW ENERGY CO., LTD. (4F Gamryeong Bldg, 153-29 Samseong-dong, Gangnam-gu, Seoul 135-878, 135-878, KR)
㈜리뉴에너지 (서울특별시 강남구 삼성동 153-29 감령빌딩 4층, 135-878 Seoul, 135-878, KR)
International Classes:
C01B33/037; B09B3/00
Attorney, Agent or Firm:
LEEON INTELLECTUAL PROPERTY LAW FIRM (316 Kolon Science Valley 2cha, 811 Guro-dong, Guro-gu, Seoul 152-050, 152-050, KR)
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