Effect of Dry Grinding of Pyrophyllite on the Hydrothermal Synthesis of Zeolite Na-X and Na-A

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概要

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• Zeolite Na-X and Na-A were synthesized by mechanochemical activation of pyrophyllite and pyrophyllite-gibbsite mixture followed by hydrothermal reaction in NaOH solution at 75°C under atmospheric pressure. The formation of zeolite Na-X and Na-A was depended on the degree of activation caused by grinding; i.e., grinding accelerated the dissolution of loosely bonded Si substances rather than Al ones of the ground pyrophyllite particles leading the Si/Al molar ratio close to 1.2, which is favorable for the formation of zeolite Na-X. The mixed grinding of pyrophyllite and gibbsite enabled us to synthesize zeolite Na-A monophase. In the early stage of grinding within 60 min, the hydroxysodalite (HS) phase was detected, however, HS disappeared completely when the grinding time extended to 120 min. The highest crystallinity (I/I0) of zeolite Na-A synthesized was estimated to 0.93 at the mixture with Si/Al molar ratio of 1.2.

• The Japan Institute of Metals and Materialsの論文

著者

• Kim Sangbae

  Mineral Resources Res. Div. Korea Inst. Of Geoscience & Mineral Resources

• CHAE Woori

  Department of Mineral Resources and Energy Engineering, Chonbuk National University

• Kim Wantae

  Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources

• Kwon Soyeon

  Department of Geo-Environmental Sciences, Kongju National University

• Kim Kwanho

  Mineral Processing Department, Korea Institute of Geoscience and Mineral Resources

• Lee Hoon

  Mineral Processing Department, Korea Institute of Geoscience and Mineral Resources

関連論文

• Solvent Extraction Separation of Co(II) from Synthetic Leaching Sulfate Solution of Nickel Laterite Ore with High Magnesium Content
• Electrostatically Controlled Enrichment of Lepidolite via Flotation
• Effect of Dry Grinding of Pyrophyllite on the Hydrothermal Synthesis of Zeolite Na-X and Na-A

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