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Method for preparing barium carbonate, calcium sulfide and sodium chloride by using alkali sulfide waste residues

A technology of alkali sulfide and sodium chloride, applied in chemical instruments and methods, alkali metal chloride, calcium carbonate/strontium/barium, etc., can solve problems such as potential safety hazards, environmental pollution, poisoning, 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 chloride with soda sulfide waste residue, its raw material is barium sulfate by-product sodium sulfide method gained soda sulfide waste residue, 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 chloride solution;

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

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

Embodiment 2

[0031] The method for preparing barium carbonate, calcium sulfide and sodium chloride with soda sulfide waste residue, its raw material is barium sulfate by-product sodium sulfide method gained soda sulfide waste residue, 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 chloride solution;

[0033] Step B: The alkali sulfide waste residue suspension and the barium chloride solution are successively put into the anti-corrosion reactor with the molar content ratio of sodium carbonate and barium chloride pure substance 1:1, and the chemical reaction is carried out. At this time, due to the barium ions It combines with carbonate ions to form barium carbonate and precipitates. Therefore, at the end of the reaction, the solution does not contain barium ions or contains a very small am...

Embodiment 3

[0041] The method for preparing barium carbonate, calcium sulfide and sodium chloride with soda sulfide waste residue, its raw material is barium sulfate by-product sodium sulfide method gained soda sulfide waste residue, 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 chloride barium solution;

[0043] Step B: The alkali sulfide waste residue suspension and the barium chloride solution are successively put into the anti-corrosion reactor with the ratio of the molar content of sodium carbonate and barium chloride pure substance 1:1.2, and the chemical reaction is carried out. At this time, due to the barium ions It combines with carbonate ions to form barium carbonate and precipitates. Therefore, at the end of the reaction, the solution does not contain barium ions or contain...

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PUM

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Abstract

The invention provides a method for preparing barium carbonate, calcium sulfide and sodium chloride by using alkali sulfide waste residues. The method comprises the following steps of: making alkali sulfide waste residues which serve as a raw material and are obtained by a method for producing barium sulfate with sodium sulfide as a byproduct react with a barium chloride solution by mixing to obtain a mixture containing barium carbonate, sodium chloride and sodium sulfide, and filtering to obtain a clarified solution containing sodium chloride and sodium sulfide, and a filter cake containing barium carbonate; washing the filter cake containing barium carbonate, drying and grinding to obtain a barium carbonate product; making the solution containing sodium chloride and sodium sulfide react with a calcium chloride solution by mixing, filtering to obtain a calcium sulfide filter cake and a sodium chloride solution, washing the calcium sulfide filter cake, drying and grinding to obtain a calcium sulfide product; and distilling the sodium chloride solution to obtain a supersaturated solution, and performing spray drying to obtain a sodium chloride product. By adopting the method, environmental pollution caused by alkali sulfide waste residues is eliminated, potential value of the alkali sulfide waste residues is effectively utilized, and wastes are changed into valuable. The method provided by the invention is a method with high practical value.

Description

technical field [0001] The present invention relates to the technical field of treatment and utilization of waste alkali sulfide residue obtained by barium sulfate by-product sodium sulfide method, in particular to a method for preparing barium carbonate, calcium sulfide and sodium chloride with waste alkali sulfide residue, the raw material of which is barium sulfate by-product sodium sulfide Alkali sulfide residue obtained by the method. 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 concentrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C01F11/00C01D3/04B09B3/00
Inventor 谢善情
Owner 谢善情