酸性白土より微粉ケイ酸塩の製造に関する研究　（第７報）　硫酸処理によるモンモリロナイトの構造変化

• 前野 昌弘

  東京理科大学山口短期大学

• 鐘尾 浩一

  日鉄鉱業株式会社

• 野納 敏展

  日鉄鉱業株式会社

• 藤川 英樹

  日鉄鉱業株式会社

書誌事項

タイトル別名

• Structural Change of Montmorillonite by Sulfuric Acid Treatment.

抄録

Ca-montmorillonite from Vici, Oklahoma, U.S.A. is treated with 15% and 35% sulfuric acid at 70°C for 36 hours. With increasing hours, chemical change and morphological alteration are estimated as follows. At first stage, the primary 40Å micropores develop with the extraction of interlayer Ca. At second stage, larger micropores are made as the result of the leaching of octahedral Mg, Fe and Al. The specific surface area becomes maximum of 500m²/g at about 24 hours in case of 15% sulfuric acid treatment and 360m²/g at 9 hours in case of 35% sulfuric acid treatment. At final stage, the primary 40Å micropores disappear and secondary larger micropores remain. As the result, the specific surface area decreases from 360 to 300m²/g in case of 35% sulfuric acid. It is considered that this alteration is caused by the decomposition of montmorillonite structure and the formation of amorphous silica during sulfuric acid treatment.

収録刊行物

• 粘土科学

  粘土科学 33 (3), 130-137, 1993

  一般社団法人 日本粘土学会

キーワード

• Ca-montmorillonite
• sulfuric acid
• structural change
• specific surface area
• micropore
• pore volume
• amorphous silica

詳細情報

• CRID: 1390001204112430336
• NII論文ID: 130004307578
• DOI: 10.11362/jcssjnendokagaku1961.33.130
• ISSN: 21863563
• ISSN: 04706455
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可