The method that barium sulfide produces barium hydroxide co-production barium sulfate and sodium thiosulfate

Abstract

The invention discloses a method for directly producing barium hydroxide and co-producing barium sulfate and sodium thiosulfate by utilizing barium sulfide, comprising the following steps: S100: dissolving crude barium sulfide black ash in process water at a temperature of 65-85°C , make a clear barium sulfide solution with a concentration of 150-200g / L for subsequent use; S200: oxygen is introduced into the barium sulfide solution, and the barium sulfide is oxidized; S300: the solution obtained by S200 is filtered to remove impurities, and the clear solution is cooled to obtain solution and crystallization Mixture A, and obtain mother liquor B; S400: add sodium sulfate solution to the above solution B to obtain barium sulfate product, and filter the solution to be solution C; S500: pass oxygen into solution C and continue to oxidize to obtain sodium thiosulfate pentahydrate product . The invention can not only produce barium hydroxide, but also can produce barium sulfate and sodium thiosulfate in the auxiliary belt, and the economic benefit is remarkable.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a method for directly producing barium hydroxide and co-producing barium sulfate and sodium thiosulfate by using barium sulfide. Background technique [0002] Barium hydroxide is mainly used for the manufacture of special soaps, insecticides, lubricants, hard water softening, beet sugar refining, boiler descaling, glass lubrication, and the manufacture of other barium salt chemicals. At present, there are two production methods of barium hydroxide octahydrate in my country. One method is to use barium chloride-sodium hydroxide method. The disadvantage of this method is that sodium chloride is produced at the same time. The value of sodium chloride is too low and it is difficult to sell. Another method is to calcine barium carbonate into barium oxide, and then leaching crystallization method, this method is labor intensive and has a greater impact on the environment. Contents of ...

AI Technical Summary

Problems solved by technology

At present, there are two production methods of barium hydroxide octahydrate in my country. One method is to use barium chloride-sodium hydroxide method. The disadvantage of this method is that sodium chloride is produced at the same time. The value of sodium chloride is too low and it is difficult to sell. Another method is to calcinate barium carbonate into barium oxide, and then leaching crystallization method, this method is labor intensive and has a great impact on the environment

Images