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One-step production of barium hydroxide and sodium sulfide by using barium sulfide and sodium hydroxide

A barium hydroxide and sodium hydroxide technology, applied in the direction of alkali metal sulfide/polysulfide, calcium/strontium/barium oxide/hydroxide, etc. Product purity impact and other issues, to achieve the effect of saving raw material hydrochloric acid, no pollution to the environment, and shortening the process route

Active Publication Date: 2012-10-10
李易东 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is greatly affected by impurities such as calcium, aluminum, and iron in the heavy poisonous stone, and the purity of the obtained product is affected.
And in recent years, heavy poison stone resources have been exhausted, and the scope of application of this method is limited

Method used

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  • One-step production of barium hydroxide and sodium sulfide by using barium sulfide and sodium hydroxide
  • One-step production of barium hydroxide and sodium sulfide by using barium sulfide and sodium hydroxide
  • One-step production of barium hydroxide and sodium sulfide by using barium sulfide and sodium hydroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The industrial barium sulfide black ash that 2kg barium sulfide content is 65% is packed in the container that is used for leaching, adds 3.5L hot water to this container, and the temperature of described hot water is above 95 ℃. During the leaching process, the container can be heated to ensure the water temperature.

[0027] In the above steps, on the one hand, the leaching of the raw material is repeated until the content of barium sulfide in the raw material residue is lower than 1%. On the other hand, for the leaching solution whose concentration needs to be lower than 20°Be, it is added into the container cyclically as the leaching solution to leach the raw material.

[0028] After the leaching is completed, remove the slag from the leaching solution, add it to the tank, let it stand, keep warm at 95°C, and concentrate to above 30°Be.

[0029] Add the leaching solution after standing for heat preservation into the reaction tank, measure the amount of barium ions ...

Embodiment 2

[0033] The industrial barium sulfide black ash that 2kg barium sulfide content is 55% is packed in the container that is used for leaching, adds 3.5L hot water to this container, and the temperature of described hot water is above 70 ℃. During the leaching process, the container can be heated to ensure the water temperature.

[0034] In the above steps, on the one hand, the leaching of the raw material is repeated until the content of barium sulfide in the raw material residue is lower than 1%. On the other hand, for the leaching solution whose concentration needs to be lower than 20°Be, it is added into the container cyclically as the leaching solution to leach the raw material.

[0035] After the leaching is completed, remove the slag from the leaching solution, add it to the tank, let it stand, keep warm at 80°C, and concentrate to above 30°Be.

[0036] Add the leaching solution after standing for heat preservation into the reaction tank, measure the amount of barium ion i...

Embodiment 3

[0040] The industrial barium sulfide black ash that 2kg barium sulfide content is 60% is packed in the container that is used for leaching, adds 3.5L hot water to this container, and the temperature of described hot water is above 90 ℃. During the leaching process, the container can be heated to ensure the water temperature.

[0041] In the above steps, on the one hand, the leaching of the raw material is repeated until the content of barium sulfide in the raw material residue is lower than 1%. On the other hand, for the leaching solution whose concentration needs to be lower than 20°Be, it is added into the container cyclically as the leaching solution to leach the raw material.

[0042] After the leaching is completed, remove the slag from the leaching solution, add it to the tank, let it stand, keep warm at 90°C, and concentrate to above 30°Be.

[0043] Add the leaching solution after standing for heat preservation into the reaction tank, measure the amount of barium ions ...

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Abstract

The invention provides a one-step production of barium hydroxide and sodium sulfide by using barium sulfide and sodium hydroxide, that is, industrial barium sulfide is utilized to directly react with an alkaline liquor to produce a barium hydroxide product and a byproduct sodium sulfide. The method comprises the following steps: leaching barium sulfide raw materials, carrying out slag removal on the leachate, then heating and preserving heat, determining the amount of barium ions, adding an alkali lye with the amount of caustic soda being 1-3 times of the amount of the barium ions, and separating the obtained product to obtain barium hydroxide and sodium sulfide. According to the invention, the final product can be obtained by only one step; compared with traditional process routes, the process provided by the invention is more economic, saves equipment cost and production time, omits the step of using hydrochloric acid to process barium sulfide in traditional processes, discharges without harmful gas hydrogen sulfide, is environmentally friendly, fully utilizes raw materials, and realizes atom economy.

Description

technical field [0001] The invention relates to the production of barium hydroxide, in particular to a method for reacting barium sulfide and lye to generate barium hydroxide in one step. Background technique [0002] Barium hydroxide is an important chemical raw material. At present, the methods for generating barium hydroxide mainly include the barium sulfide method and the heavy poisonous stone method. [0003] According to the record on page 55 of the fifth edition of "Chemical Product Handbook - Inorganic Chemical Raw Materials Volume" published by Chemical Industry Press in 2008: the barium sulfide method will be obtained by roasting barite and leaching the barium sulfide. The solution concentration is controlled at 14 ~16°Be, let it stand for clarification, the supernatant reacts with hydrochloric acid, the barium chloride solution produced is heated to 70~90℃ and excess caustic soda is carried out metathesis reaction at 100~110℃; after concentration, cooling and cry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/10C01B17/22
Inventor 李易东朱清明陈燕忠
Owner 李易东
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