SU636184A1 - Method of obtaining antimony oxychloride - Google Patents

Description

The invention is refractory to methods for producing antimony oxychloride, which serves as the starting material for the synthesis of other, antimony compounds, and is also used in laboratory practice. A known method for the preparation of antimony oxychloride is compounded with hydrolytic decomposition of antimony trichloride with water, and by 1 part by weight. Three to five antiparty antimony take 5-50 weight parts. water W. The disadvantage of this method is the need to use antimony trichloride, which is prepared by dissolving antimony trioxide in concentrated hydrochloric acid, evaporating the solution and distilling trichloride at 220 C. It is also known to produce antimony oxychloride by treating antioxid trioxide with concentrated hydrochloric acid at heating, hydrolysis of the resulting solution with water, followed by separation of the product, washing and drying it 2. The disadvantages of this method are the duration of the process and its multi-stage process and the considerable costs of obtaining the target product, as for preparing a solution of antimony trichloride per 1 kg of antimony trioxide requires 4 kg of concentrated hydrochloric acid, and a large amount of distilled is required for hydrolysis of sludge washing water. The aim of the invention is to intensify the process of producing antimony oxychloride. The goal is achieved by the described method (obtaining antimony oxychloride, which consists in treating antimony trioxide with a solution of hydrochloric acid at a concentration of 20-50 g / l, separating the product, washing and drying. The concentration of hydrochloric acid is different. Its concentration is less than 2O g / l, the process of formation of antimony oxychloride slows down dramatically, with

Concentrates above 50 g / l, partial dissolution of antimony trioxide occurs.

The proposed method allows to reduce the process time from 7-1 O to 1.0-1.5 h.

Example 1. A 19O ml of 50 g / l hydrochloric acid solution is heated to 70 ° C and 58.5 g of antimony trioxide are poured into it with stirring. The suspension is stirred at this temperature for 0.5 hours. After stirring, the content of residual hydrochloric acid does not change and amounts to 11.5 g / l, which indicates the completion of the reaction-formation of antimony chloroxane. The precipitate was fi lled, washed with 50 ml of cold water and dried, B5.2 g of product was obtained with an antimony content of 76.3 wt. % and chlorine 11,08 wt.%

Calculated for 2 SbOCE o2, b

5 76.34 wt.% CE 11.11 wt.%. The product yield of 99.2%. The content of antimony in the mother solution is less than O, OB mg / l.

Example 2. 760 ml of a hydrochloric acid solution with a concentration of 20 g / l are heated. Syv is filled with 58.5 tons of antimony trioxide. After stirring for 1 hour, the hydrochloric acid content in the solution is 12.7 g / l. h - 1O, 8 g / l, Zi 4h-1O, 4 g / l. The precipitate is filtered, washed and dried. 63.1 g of product are obtained with the content of:: apy 76.5% by weight, chlorine 1O, 9% by weight. The product yield is 98.9%,

Technique-economic indicators of the known and proposed methods are presented in the table.

The duration of the process, h

Consumption of 30% hydrochloric acid per 1 ton of product

Distilled water consumption, t per 1 ton of product

Claims (2)

1. Korin Yu. V., Angelov I. I. Chemical Chemical Substances, 1974, p. 352. 2. Industry of chemical reagents and high purity substances Information Bulletin, No. 2, IREA, 1963, with. 34-36.