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Method for preparing strontium carbonate and co-producing calcium sulfate and industrial salt by using filter cake strontium sulfate

A technology of calcium sulfate and strontium sulfate, applied in the direction of calcium carbonate/strontium/barium, calcium/strontium/barium sulfate, solid waste removal, etc., can solve the problems of environmental pollution, large land occupation, waste, etc., and achieve governance Effects of environmental pollution, high profit and low cost

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

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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 strontium carbonate and co-producing calcium sulfate and industrial salt with filter cake strontium sulfate

Method used

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  • Method for preparing strontium carbonate and co-producing calcium sulfate and industrial salt by using filter cake strontium sulfate
  • Method for preparing strontium carbonate and co-producing calcium sulfate and industrial salt by using filter cake strontium sulfate

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Embodiment 1

[0023] A kind of method that uses filter cake strontium sulfate to prepare strontium carbonate to co-produce calcium sulfate and industrial salt, the converted filter cake strontium sulfate (according to 400kg strontium sulfate) and chlor-alkali refining waste liquid calcium chloride are successively in pure mass ratio 1:0.40 Drop into anticorrosion reactor-1 successively and carry out stirring reaction, the pure mass ratio of described barium sulfide waste residue and hydrochloric acid is converted according to the pure barium sulfide in the barium sulfide waste residue;

[0024] The reaction mixture obtained from the reaction in anticorrosion reactor one 1 is filtered with filter one 2 to obtain white filter cake calcium sulfate and 227.07kg of clarified liquid strontium chloride; the filtrate and sodium carbonate are successively put into the anticorrosion reactor with a pure mass ratio of 1:0.47 Stirring reaction is carried out in 23 li, generates the mixture of strontium c...

Embodiment 2

[0028] A method for preparing strontium carbonate co-production of calcium sulfate and industrial salt with filter cake strontium sulfate, the converted filter cake strontium sulfate (according to 400kg strontium sulfate) and chlor-alkali refining waste liquid calcium chloride are successively in a pure mass ratio of 1:0.60 Drop into anticorrosion reactor-1 successively and carry out stirring reaction, the pure mass ratio of described barium sulfide waste residue and hydrochloric acid is converted according to the pure barium sulfide in the barium sulfide waste residue;

[0029] The reaction mixture obtained from the reaction in anticorrosion reactor one 1 is filtered with filter one 2 to obtain white filter cake calcium sulfate and 340.60 kg of clarified liquid strontium chloride; and sodium carbonate is successively dropped into anticorrosion reactor two with a pure mass ratio of 1: 0.67 3. carry out stirring reaction, generate the mixture of strontium carbonate precipitation...

Embodiment 3

[0033] A method for preparing strontium carbonate co-production of calcium sulfate and industrial salt with filter cake strontium sulfate, the converted filter cake strontium sulfate (according to 400kg strontium sulfate) and chlor-alkali refining waste liquid calcium chloride are successively in a pure mass ratio of 1:0.80 Drop into anticorrosion reactor-1 successively and carry out stirring reaction, the pure mass ratio of described barium sulfide waste residue and hydrochloric acid is converted according to the pure barium sulfide in the barium sulfide waste residue;

[0034] The reaction mixture obtained by the reaction in anticorrosion reactor one 1 is filtered with filter one 2 to obtain white filter cake calcium sulfate and 454.13kg of clarified liquid strontium chloride; and sodium carbonate is successively dropped into anticorrosion reactor two with a pure mass ratio of 1: 0.87 3. carry out stirring reaction, generate the mixture of strontium carbonate precipitation an...

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Abstract

The invention belongs to the technical field of chemical three-waste treatment and utilization, and particularly relates to a method for preparing strontium carbonate and co-producing calcium sulfate and industrial salt by using filter cake strontium sulfate. The method mainly comprises the following steps of:: processing the filter cake strontium sulfate by fully using calcium chloride so as to form purer solution, such as strontium chloride, exchanging with sodium carbonate to obtain precipitated strontium carbonate and the byproducts of strontium sulfate and industrial salt; then preparing the product with higher economic value and eliminating a great amount of waste residue of barium sulphide. The invention has the advantages of low cost, high profit, great market demand, simple process and production device, provides a comparatively practical processing and utilizing method which can create appreciable economic value, eliminate the chemical waste residue and solve environmental pollution, particularly treats the waste residue of barium sulphide completely and avoids secondary pollution and environmental-friendly hidden troubles.

Description

technical field [0001] The invention belongs to the technical field of treatment and utilization of chemical wastes, in particular to a method for preparing strontium carbonate and co-producing calcium sulfate and industrial salt by using filter cake strontium sulfate. 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 strontium carbonate and co-producing calcium sulfate and industrial salt with filter cake...

Claims

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Application Information

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IPC IPC(8): C01F11/18C01F11/46C01D3/04B09B3/00
Inventor 王嘉兴
Owner 汪晋强