Sintesis Talk dari Batuan Dolomit dan Kuarsa Lokal Serta Prospeknya untuk Industri Kimia dan Farmasi

Chicha Nuraeni, Retno Yunilawati, Dwinna Rahmi

Abstract


Talk dari bahan baku lokal berpotensi untuk dikembangkan. Telah dilakukan sintesis talk dari bahan baku lokal dolomit dan kuarsa dengan metode pemanasan/kalsinasi dan hidrotermal. Karakterisasi dolomit yang diperoleh dari Gresik, Jawa Timur menunjukkan kandungan CaMg(CO)3 sebanyak 71,0 %berat dan CaCO3 sebanyak 29,0 %berat. Pemanasan dolomit pada 300 oC selama 24 jam menghasilkan kalsit CaCO3, periclase MgO dan portlandite Ca(OH)2, sedangkan pemanasan pada 750 oC selama 24 jam menghasilkan kalsit (CaCO3 dan CCa0.936 Mg0.064O3), periclase MgO dan portlandite Ca(OH)2. Kandungan MgO dari pemanasan dolomit pada 300 oC lebih tinggi daripada pemanasan 750 oC sehingga disarankan sintesis talk dilakukan pada suhu 300 oC. Proses pengadukan bahan baku secara konvensional dan sonikasi tidak menghasilkan perbedaan produk. Proses hidrotermal selama 6 jam menghasilkan lebih banyak mineral CaxMgy(SiO3)2 dibandingkan durasi proses 12 jam dan 18 jam. 


Keywords


Dolomit; Kuarsa; Talk; Proses hidrotermal

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DOI: http://dx.doi.org/10.24817/jkk.v38i2.2700

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