A kind of preparation method of praseodymium yellow pigment

Abstract

The invention provides a preparation method of a praseodymium yellow pigment. The preparation method comprises the following steps: reacting a soluble zirconium source, a soluble praseodymium source and a soluble silicon source in a mixed solution of a C1-C4 alcohol type solvent, water and a surfactant under the condition that the pH value is 6-11 to obtain a precipitate; mixing the precipitate with a mineralizer and water, and then spray-drying to obtain particles; calcining the particles, and then sequentially crushing and grinding to obtain ultrafine particles; and performing post-treatment on the ultrafine particles to obtain the praseodymium yellow pigment. According to the preparation method provided by the invention, the precipitate with homogeneous microcomponents, relatively small particle size and relatively high surface activity is generated from the soluble zirconium source, the soluble praseodymium source and the soluble silicon source under a liquid-phase condition by adopting a liquid-phase precipitation method, so that the using amount of the subsequent mineralizer can be effectively reduced, the solid-phase reaction time can be shortened, the energy consumption in the calcination process can be reduced, and the difficulty in subsequent crushing can be also reduced.

Description

technical field [0001] The invention belongs to the technical field of pigment preparation, in particular to a preparation method of praseodymium yellow pigment. Background technique [0002] Praseodymium yellow, also known as zirconium praseodymium yellow in the ceramic industry, is mainly used in the coloring of ceramic glazes. Its main component is zirconium silicate, and an appropriate amount of Pr 3+ and other ions to make a series of yellow pigments. [0003] The traditional method of preparing praseodymium yellow uses zircon sand as the main raw material, praseodymium oxide or praseodymium oxalate and other auxiliary materials are mixed by wet physical ball milling, and the base material is formed by calcining at a high temperature of about 1000 °C for a long time, and then pulverized, washed, dried, Grinding and sieving to make glaze pigments; or physically mixing zirconia, silicon dioxide, praseodymium oxide or praseodymium oxalate, and various mineralizers, calcin...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN102627478A discloses a solid material prepared by mixing zirconium oxychloride, cadmium sulfate, sodium sulfide, caustic soda, and zinc chloride in the liquid phase. After mixing white carbon black and multiple groups of mineralizers containing fluorine, it is calcined, A method for preparing a yellow pigment after acidification, ball milling, acid bleaching, and alkali boiling processes, but the heavy metal cadmium is used in the production process of the pigment, which is used in the production of pigments, the long-term use of subsequent products, and the scrapping process The cadmium contained in the pigment is extremely harmful to the safety of the human body and the natural environment

This method requires multiple crushing and grinding, and the prepared pigment particles are relatively large, making it difficult for the yellow pigment to be used in the fields of coatings, plastics, inks, glazes, etc.

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