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Minerals 2017, 7(5), 69;

Synthesis of Ultramarine from Reservoir Silts

Department of Resources Engineering, National Cheng Kung University, 1 Da-Hsueh Road, Tainan 70101, Taiwan
Author to whom correspondence should be addressed.
Academic Editor: Radostina G. Atanassova
Received: 27 March 2017 / Revised: 2 May 2017 / Accepted: 4 May 2017 / Published: 7 May 2017
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Ultramarine blue was synthesized by using reservoir silts as a major raw material to replace traditional kaolin clay. The reservoir silts were pretreated to collect the fines, in which the main mineral composition is illite clay. The fine part was mixed with sodium carbonate, sulfur, and activated carbon, and calcined at 800°C for 8 h. The products were examined by X-ray powder diffraction (XRD) and a scanning electron microscope (SEM) to identify the mineral phases and particle morphology. The color characteristics were measured according to the CIELab system. Brilliant blue ultramarine powders were successfully synthesized with a chroma of 52.4, which is competitive with the commercial ultramarine. View Full-Text
Keywords: reservoir silts; ultramarine; synthesis reservoir silts; ultramarine; synthesis

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Hsiao, Y.-H.; Shen, Y.-H.; Ray, D.-T. Synthesis of Ultramarine from Reservoir Silts. Minerals 2017, 7, 69.

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