Method for rapidly analyzing and detecting impurity sodium sulfide in barium sulfide solution

A rapid analysis and detection method technology, which is applied in the direction of chemical analysis by titration, analysis by making materials undergo chemical reactions, and material analysis by observing the impact on chemical indicators, etc., which can solve volatility and low production efficiency , limit the application of mechanization, automation and informatization in the compounding process, and achieve the effects of sharp color change, easy observation, and simple operation methods
CN113237994APending Publication Date: 2021-08-10南风化工(运城)集团有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
南风化工(运城)集团有限公司
Publication Date
2021-08-10

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Abstract

The invention provides a method for rapidly analyzing and detecting impurity sodium sulfide in a barium sulfide solution, and relates to the field of production of precipitated barium sulfate. The method mainly comprises the following steps: (1) measuring the total content of sulfur in a solution by iodometry; (2) measuring the content of barium in the solution by using an Mg-EDTA replacement method; (3) calculating the content of sulfur in barium sulfide according to the content of barium; and (4) calculating the content of sulfur in sodium sulfide by subtracting the content of sulfur in barium sulfide from the total content of sulfur so as to obtain the content of impurity sodium sulfide. The method fills the gap of a method for analyzing and detecting the impurity sodium sulfide in the barium sulfide solution, has the advantages of acute color change at the titration end point, easiness in observation, simplicity, convenience, rapidness, economy, practicability and the like, and has an important guiding effect on reaching the end point of the combination reaction in the production of precipitated barium sulfate.
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Description

technical field

[0001] The invention relates to the technical field of precipitated barium sulfate production, in particular to a rapid analysis and detection method for impurity sodium sulfide in a barium sulfide solution. Background technique

[0002] At present, most domestic precipitated barium sulfate production enterprises adopt the "glauber's salt-black ash" method or "Yuan Mingfen-black ash" method to produce precipitated barium sulfate, that is, barite and coal are converted into barium sulfide (commonly known as "barium sulfide" after high-temperature roasting and reduction) "black ash") melt, and then leaching the "black ash" melt with water to obtain a barium sulfide solution; the Glauber's salt solution or Yuanming powder solution reacts with the barium sulfide solution to form precipitated barium sulfate. The chemical reaction is as follows:

[0003] BaSO 4 +4C→BaS+4CO

[0004] BaS+Na 2 SO 4 → BaSO 4 +Na 2 S

[0005] In order to comprehensively utilize ...

Claims

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