Abstract
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.
Highlights
The annual sedimentation rate of the world’s reservoirs averages about 1%, but it is much higher in Asia [1,2]
The reservoir silts were first treated hydrothermally to transform them to hydroxycancrinite [28]; the hydroxycancrinite was transformed to ultramarine blue via a solid-state reaction process
7, 69 study, the reservoir silts were first treated hydrothermally to transform 3them of 13 to hydroxycancrinite [28]; the hydroxycancrinite was transformed to ultramarine blue via a solid-state reaction process. conditions, In this study,such reservoir siltsmaterials were used directly to synthesize ultramarine
Summary
M.L. The Study on the Clay of Reservoir in Taiwan. Structure and dynamics of S3 − radicals in ultramarine-type pigment based on zeolite A: Electron spin resonance and electron spin echo studies. Encapsulation of the chromophores into the sodalite structure during the synthesis of the blue ultramarine pigment. New Synthesis and insight into the structure of blue ultramarine pigments. K.T.; Ray, D.T. A study on the synthesis of zeolites and ultramarine pigment from reservoir sediments. De Menezes, R.A.; Da Paz, S.P.A.; Angélica, R.S.; De Freitas Neves, R.; Castella Pergher, S.B. Color and shade parameters of ultramarine zeolitic pigments synthesized from kaolin waste.
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