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Method for preparing barium carbonate, calcium sulfide and sodium nitrate by sodium sulfide waste residue

A technology of alkali sulfide and sodium nitrate, applied in chemical instruments and methods, alkali metal nitrates, calcium carbonate/strontium/barium, etc., can solve problems such as hidden safety hazards, poisoning, environmental pollution, etc., and achieve the effect of eliminating pollution

Inactive Publication Date: 2011-07-06
谢善情
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the hydrogen sulfide gas generated by reacting with water will cause poisoning and even death after being absorbed into the human body. Therefore, if the waste alkali sulfide residue is not utilized and treated, it will not only cause environmental pollution, but also pose certain safety hazards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The method for preparing barium carbonate, calcium sulfide and sodium nitrate with soda sulfide waste slag, its raw material is barium sulfate by-product sodium sulfide method gained soda sulfide waste slag, comprises the steps:

[0022] Step A: convert the sodium carbonate content in the sodium sulfide waste residue, and the alkali sulfide waste residue is pulverized into 80 orders, and then configure the alkali sulfide waste residue suspension and barium nitrate solution;

[0023] Step B: Put the alkali sulfide waste residue suspension and barium nitrate solution into the anti-corrosion reactor successively with the molar content ratio of sodium carbonate and barium nitrate pure substance 1: 0.8, carry out chemical reaction, obtain barium carbonate, sodium nitrate and Sodium sulphide mixtures;

[0024] Step C: the resulting mixture of step B is filtered through a filter to obtain a clear solution containing sodium nitrate and sodium sulfide and a filter cake containin...

Embodiment 2

[0031] The method for preparing barium carbonate, calcium sulfide and sodium nitrate with soda sulfide waste slag, its raw material is barium sulfate by-product sodium sulfide method gained soda sulfide waste slag, comprises the steps:

[0032] Step A: convert the sodium carbonate content in the sodium sulfide waste residue, and the alkali sulfide waste residue is pulverized into 90 orders, and then configure the alkali sulfide waste residue suspension and barium nitrate solution;

[0033] Step B: The alkali sulfide waste residue suspension and barium nitrate solution are successively put into the anti-corrosion reactor with the molar content ratio of sodium carbonate and barium nitrate pure substance at a ratio of 1:1, and the chemical reaction is carried out. The root ions are combined into barium carbonate and precipitated. Therefore, at the end of the reaction, the solution does not contain barium ions or contains a very small amount of barium ions, thereby obtaining a mixt...

Embodiment 3

[0041] The method for preparing barium carbonate, calcium sulfide and sodium nitrate with soda sulfide waste slag, its raw material is barium sulfate by-product sodium sulfide method gained soda sulfide waste slag, comprises the steps:

[0042] Step A: convert the sodium carbonate content in the sodium sulfide waste residue, and the alkali sulfide waste residue is pulverized into 100 orders, and then configure the alkali sulfide waste residue suspension and barium nitrate barium solution;

[0043] Step B: The alkali sulfide waste residue suspension and barium nitrate solution are successively put into the anti-corrosion reactor with the ratio of the molar content of sodium carbonate and barium nitrate pure substance 1:1.2, and the chemical reaction is carried out. The root ions are combined into barium carbonate and precipitated. Therefore, at the end of the reaction, the solution does not contain barium ions or contains a very small amount of barium ions, thereby obtaining a m...

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PUM

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Abstract

The invention provides a method for preparing barium carbonate, calcium sulfide and sodium nitrate by sodium sulfide waste residue, which comprises the steps of: taking the sodium sulfide waste residue obtained by a method of by-product sodium sulfide of barium sulfate as raw material; mixing the sodium sulfide waste residue and barium nitrate solution for reaction, and obtaining mixture containing the barium carbonate, the sodium nitrate and sodium sulfide; filtering the obtained mixture and obtaining clear solution containing the sodium nitrate and the sodium sulfide as well as a filter cake containing the barium carbonate; washing, drying and grinding the filter cake containing the barium carbonate, and obtaining the barium carbonate product; mixing the solution containing the sodium nitrate and the sodium sulfide to have reaction with calcium nitrate solution, filtering and obtaining a calcium sulfide filter cake and sodium nitrate solution; washing, drying and grinding the calcium sulfide filter cake, and obtaining the calcium sulfide product; and finally, leading the sodium nitrate solution to be distilled into supersaturated solution, spray drying and obtaining the sodium nitrate product. The method eliminates the pollution of the sodium sulfide waste residue for the environment, and effectively utilizes the potential value of the sodium sulfide waste residue, thus changing waste into valuable, and being good in practical value.

Description

technical field [0001] The present invention relates to the technical field of treatment and utilization of sodium sulfide waste residue obtained by the barium sulfate by-product sodium sulfide method, in particular to a method for preparing barium carbonate, calcium sulfide and sodium nitrate with the alkali sulfide waste residue, the raw material of which is the barium sulfate by-product sodium sulfide method The resulting alkali sulfide residue. Background technique [0002] The industrial production methods of soda sulfide (sodium sulfide) mainly include coal powder reduction mirabilite method, gas reduction method, barium sulfate by-product sodium sulfide method and hydrogen sulfide method. Among them, the barium sulfate by-product sodium sulfide method is to use coal to reduce barium sulfate to produce barium sulfide, then add sodium sulfate solution for treatment to generate sodium sulfide and precipitate barium sulfate, separate by suction filtration, evaporate and c...

Claims

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Application Information

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IPC IPC(8): C01F11/18C01F11/00C01D9/00B09B3/00
Inventor 谢善情
Owner 谢善情