Pengaruh Penambahan Template  Polietilen Glikol  Terhadap Karakter -Al2O3 dari Kaolin

Sunardi Sunardi; Lilik Nofianti; Utami Irawati

doi:10.20527/flux.v17i1.6451

Pengaruh Penambahan Template Polietilen Glikol Terhadap Karakter -Al2O3 dari Kaolin

Sunardi Sunardi, Lilik Nofianti, Utami Irawati

Abstract

Synthesis of g-Al₂O₃ from Tatakan, South Kalimantan kaolin using simple methods: metakaolinization, dealumination, precipitation process using polyethylene glycol (PEG-6000) as a structure directing agent, calcination steps, and characterization of its products have been presented. The purified kaolin was metakaolinized and dealuminated to get amorphous aluminum hydroxide. After that, the sample was precipitated using the various concentration of PEG and NH₄OH as the precipitating agent. Calcination process was carried out at calcined at a temperature of 700°C for 3 hours. Based on the FTIR spectra and X-ray diffraction of the g-Al₂O₃obtained was similar to that of commercial g-Al₂O₃. The highest crystallinity of g-Al₂O₃was formed when using twice of critical micelle concentration of PEG (10^-3 mol/L). This simple process is an industrially practicable substitute to the Bayer process

Keywords

kaolin, metakaolin, -alumina, polietilen glikol

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DOI: http://dx.doi.org/10.20527/flux.v17i1.6451