Preparation method of antimony (III) trioxide cubic crystal

Abstract

The invention discloses a preparation method of an antimony (III) trioxide cubic crystal. The preparation method comprises the following steps: step one, dissolving antimony trichloride into glycol; step two, heating the solution to a temperature of 25-90 DEG C, and introducing ammonia gas into the solution until the pH value of the solution is greater than 8; step three, after the reaction, mixing the obtain solid-liquid mixture with distilled water, and stirring to carry out hydrolysis; step four, after the hydrolysis, carrying out centrifugal separation, washing the obtained substances until no chlorine ion exists on the substances, and drying so as to obtain the antimony (III) trioxide cubic crystals. The provided preparation method has the following advantages: (1) the raw materials are cheap, and the technology is simple; (2) the organic solvent can be recycle and reutilized, the recycling cost is low, and the production cost is reduced; (3) the crystal form of the obtained product is single, the crystallization is complete, and thus the crystals can be easily dispersed in plastic and paints and attached on fibers.

Description

[0001] technical field [0002] The invention relates to a preparation method of an inorganic antimony-based flame retardant, in particular to a preparation method of antimony trioxide. [0003] Background technique [0004] Antimony-based flame retardants are one of the most important inorganic flame retardants. They have little flame-retardant effect when used alone, but when used in combination with halogen-based flame retardants, they can greatly improve the performance of halogen-based flame retardants. [0005] Antimony trioxide is one of the main varieties of antimony-based flame retardants. Adding antimony trioxide to plastics, coatings and fibers after nanometerization will form inorganic-organic polymer nanocomposites. On the one hand, it will significantly increase the antimony trioxide The flame retardancy synergism and flame retardancy of diantimony and the flame retardancy of the whole material will also significantly improve and enhance the physical and chemi...

AI Technical Summary

Problems solved by technology

[0006] At present, there are two types of preparation methods of antimony trioxide powder: dry method and wet method. All dry methods require some special equipment, while wet methods are easy to carry out. Alcohol salt hydrolysis is commonly used in wet methods, but the raw materials are expensive and loss The liquid ratio is relatively large, and the water content is strictly required