Preparation method of barium hydroxide

Abstract

The invention discloses a preparing method of barium hydroxide, which comprises the following steps: (1) reducing barite into barium sulphide through coal; (2) immersing barium sulphide through washing water to obtain mother liquid of barium sulphide; adjusting the temperature of mother liquid of barium sulphide to 30-70 Deg C and density at 50-150g / L; washing filter slag through water; immersing barium sulphide through washing water; (3) oxidizing barium sulphide to produce barium hydroxide, sulfur and manganese monoxide through manganese dioxide; filtering to obtain barium hydroxide mother liquid; obtaining the filter slag with sulfur and manganese monoxide; (4) condensing barium hydroxide; crystallizing; centrifuging; separating to obtain barium hydroxide octahydrate; (5) separating filter slag in the step (3); recycling sulfur; oxidizing manganese monoxide into manganese dioxide through air to circulate in the step (3).

Description

(1) Technical field

[0001] The invention relates to a preparation method of a barium compound, in particular to a preparation method of barium hydroxide. (two), background technology

[0002] Barium hydroxide is a basic chemical raw material, used to manufacture barium salts, organic barium compounds, barium-based grease, and also used for refining animal and vegetable oils, sucrose, and sugar beets. Also used in plastic stabilizers, paper additives, sealing components, rubber vulcanization catalysts, antirust paper components, paint dispersants, polyurethane foam fire extinguishing agents, silk and rayon treatment agents, boiler hard water softeners and neutralizers, glass The enamel industry is used as a raw material for the production of glass and enamel. With the development of new uses for barium hydroxide, the market demand for barium hydroxide is increasing year by year.

[0003] There are two traditional barium hydroxide industrial production processes:

[0004] (1...