Method for coproducing sodium sulphide and industrial salts while preparing precipitated barium sulfate from barium sulfide waste slag

A technology for precipitating barium sulfate and barium sulfide, which is applied to the removal of calcium/strontium/barium sulfate, alkali metal sulfide/polysulfide, and solid waste, and can solve problems such as occupying large land, waste, and environmental pollution. , achieve the effect of high profit, low cost, and environmental pollution control

Inactive Publication Date: 2011-03-23
汪晋强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thiourea is produced through crystallization, dehydration, drying, crushing, and packaging. Every ton of thiourea produced will produce 9.5 tons of barium sulfide waste residue. The environment is polluted, especially the waste residue contains some rare metals, if not utilized, it will be a great waste
There is no relevant report about the method of preparing precipitated barium sulfate and co-producing soda sulfide and industrial salt with barium sulfide waste residue

Method used

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  • Method for coproducing sodium sulphide and industrial salts while preparing precipitated barium sulfate from barium sulfide waste slag
  • Method for coproducing sodium sulphide and industrial salts while preparing precipitated barium sulfate from barium sulfide waste slag

Examples

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Embodiment 1

[0024] A method for preparing precipitated barium sulfate to co-produce soda sulfide and industrial salt with barium sulfide waste residue. The converted barium sulfide waste residue (calculated as 400kg barium sulfide) and hydrochloric acid are sequentially put into the anti-corrosion reactor with a pure mass ratio of 1:0.26 One mile, chemical reaction is carried out under slow stirring;

[0025] The reaction mixture that reaction obtains is filtered with filter one 2, removes insoluble impurity, and barium chloride filtrate and sodium sulfate drop into anticorrosion reactor two 3 lis successively with pure mass ratio 1: 0.52 and carry out stirring reaction (the described filtrate and calcium hydroxide The pure mass ratio is converted according to pure barium chloride in the filtrate), then filter with filter 2 4, and the sodium chloride filtrate obtained by filtering is distilled with distiller 1 5 to obtain 333.83kg industrial salt 6; Barium sulfate filter cake washes, drie...

Embodiment 2

[0028] A method for preparing precipitated barium sulfate to co-produce soda sulfide and industrial salt with barium sulfide waste residue. The converted barium sulfide waste residue (calculated as 400kg barium sulfide) and hydrochloric acid are sequentially put into the anti-corrosion reactor with a pure mass ratio of 1:0.46 One mile, chemical reaction is carried out under slow stirring;

[0029] The reaction mixture that reaction obtains is filtered with filter one 2, removes insoluble impurity, and barium chloride filtrate and sodium sulfate drop into anticorrosion reactor two 3 li successively with pure mass ratio 1: 0.72 and carry out stirring reaction (the filtrate and calcium hydroxide The pure mass ratio is converted according to pure barium chloride in the filtrate), then filter with filter 2 4, and the sodium chloride filtrate obtained by filtering obtains 590.62kg industrial salt 6 with distiller 1 5 distillation; Barium sulfate filter cake washes, dries and pulveri...

Embodiment 3

[0032] A method for preparing precipitated barium sulfate to co-produce soda sulfide and industrial salt with barium sulfide waste residue. The converted barium sulfide waste residue (calculated as 400kg barium sulfide) and hydrochloric acid are sequentially put into the anti-corrosion reactor with a pure mass ratio of 1:0.66 One mile, chemical reaction is carried out under slow stirring;

[0033] The reaction mixture that reaction obtains is filtered with filter one 2, removes insoluble impurity, and barium chloride filtrate and sodium sulfate drop into anticorrosion reactor two 3 li successively with pure mass ratio 1: 0.92 and carry out stirring reaction (the filtrate and calcium hydroxide The pure mass ratio is converted according to pure barium chloride in the filtrate), then filter with filter 2 4, and the sodium chloride filtrate obtained by filtering obtains 847.41kg industrial salt 6 with distiller 1 5 distillation; Barium sulfate filter cake washes, dries and pulveri...

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Abstract

The invention belongs to the technical field of chemical and industrial three-waste disposal and utilization, in particular to a method for coproducing sodium sulphide and industrial salts while preparing precipitated barium sulfate from barium sulfide waste slag. In the main technical scheme of the invention, hydrochloric acid is mainly and fully used for acidification to completely remove insoluble impurities so as to obtain purer solutions such as barium chloride and the like, then, sodium sulfate is used for exchange to obtain precipitated barium sulfate and byproducts of the sodium sulphide and the industrial salts, therefore, by using the invention, a large amount of barium sulfide waste slag is eliminated when products with higher economic value are prepared. The method of the invention has the advantages of low production cost, high profit, large market demand and simple process and production equipment, belongs to a very practical treatment and utilization method, not only can create considerable economic value, but also can eliminate the chemical and industrial waste slag and control the environment pollution, particularly has thoroughly control results on the barium sulfide waste slag, and avoids secondary pollution and hidden trouble in environment protection.

Description

technical field [0001] The invention belongs to the technical field of treatment and utilization of three chemical wastes, in particular to a method for preparing precipitated barium sulfate and co-producing soda sulfide and industrial salt with barium sulfide waste residue. technical background [0002] There are many production methods for thiourea production, and the most traditional method is to use sulfuric acid to acidify barium sulfide to produce hydrogen sulfide, and then use calcium cyanide for condensation reaction. Thiourea is produced through crystallization, dehydration, drying, crushing, and packaging. Every ton of thiourea produced will produce 9.5 tons of barium sulfide waste residue. The environment is polluted, especially the waste slag contains some rare metals, if not utilized, it will be a great waste. At present, there is no relevant report about the method of preparing precipitated barium sulfate and co-producing soda sulfide and industrial salt with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/46C01B17/22C01D3/04B09B3/00
Inventor 王嘉兴
Owner 汪晋强
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