Preparation method of ultrawhite antimonous oxide

The invention discloses a preparation method of ultrawhite antimonous oxide. The preparation method comprises the steps of adding a complexing agent into purified water, adding antimony butter powderwhile stirring, filtering, obtaining antimony oxychloride precipitates, washing, adding into an alkaline solution containing a conversion agent in batches, and obtaining antimonous oxide precipitates;washing, mixing with an organic solvent, grinding in a ball mill for 3 to 8h, drying at low temperature, and obtaining white powder which is the super white antimonous oxide. The super white antimonous oxide product prepared through the preparation method provided by the invention is small in particle size, has the average whiteness being 99.0 percent, achieves high brightness, is stable in property, and is not easy to discolor when being illuminated; the preparation method provided by the invention is simple to operate, and short in production cycle; in the obtained product, the mass contentof antimonous oxide is lar