Industrial Utilization of Silica in Rice Hulls.

• Okutani Takeshi

  Hokkaido National Industrial Research Institute

• Nakata Yoshinori

  Hokkaido National Industrial Research Institute

Bibliographic Information

Other Title

• 籾殻中のシリカの工業的利用
• モミガラチュウ ノ シリカ ノ コウギョウテキ リヨウ

Abstract

Highly pure silicon and silicon compounds are required in the fields of high technology products such as semiconductor and optical fiber. Rice hulls contists of 71-87wt% of organic components such as cellulose and 13-29% of inorganic components. 87-97wt% of the inorganic components is silica (SiO₂). The reactivity of rice hull SiO₂ is assumed to be higher than that of mineral SiO₂ because rice plant accumulates it in a living body. The rice hull SiO₂ has high possibility to use as industrial raw materials though rice hulls are now utilizing only as agricultural materials or waste materials for now. To utilize the rice hull SiO₂ in the field of high technology industries, the production process of pure silicon compound from rice hull ashes is proposed in this paper. The process is that SiO₂ in rice hull ashes is reacted with Cl₂ under coexistence of C to be converted to SiCl₄, <br>SiO₂+2Cl₂+2C→SiCl₄+2CO<br>SiCl₄ is distilled to be purified. The effeciency of the process of SiCl₄ production from rice hull ashes was much higher than that from mineral SiO₂, and it is found that coexistance of potassium salts and sulfur accelerated the chlorination of SiO₂.

Journal

• Netsu Sokutei

  Netsu Sokutei 23 (3), 117-127, 1996

  The Japan Society of Calorimetry and Thermal Analysis

Details

• CRID: 1390282680064163968
• NII Article ID: 10002000724
• NII Book ID: AN00199597
• DOI: 10.11311/jscta1974.23.117
• ISSN: 18841899
• ISSN: 03862615
• NDL BIB ID: 4148413
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4148413
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • Crossref
• Abstract License Flag: Disallowed