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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

Pending Publication Date: 2021-08-10
南风化工(运城)集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, not only the production efficiency is low, but also the product quality fluctuates greatly due to the subjective factors of the inspectors and other aspects, and it also limits the application of mechanization, automation and informationization in the compounding process

Method used

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

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Embodiment 1

[0041] The rapid analysis detection of impurity sodium sulfide in the barium sulfide solution of embodiment 1

[0042] Use a 10ml pipette to accurately pipette 10ml of barium sulfide aqueous solution to a 500ml volumetric flask and shake well; add V to a 250ml Erlenmeyer flask 2 =5ml iodine standard titration solution (concentration C 2 =0.1010mol / L), 10ml water and 10ml hydrochloric acid solution, adjust the pH of the solution to be neutral or slightly acidic; then accurately pipette 10ml sample solution from the 500ml volumetric flask with a pipette and add it to the 250ml Erlenmeyer flask, while Shake constantly; use a concentration of C 1 =0.05025mol / L sodium thiosulfate standard solution titration, when the solution is titrated to light yellow, add 2ml starch indicator, continue to titrate with sodium thiosulfate standard solution until the blue color disappears, and consume the volume V of sodium thiosulfate 1 = 6.46ml; then pipette 10ml of the sample solution from the...

Embodiment 2

[0051] The rapid analysis detection of impurity sodium sulfide in the barium sulfide solution of embodiment 2

[0052] Use a 10ml pipette to accurately pipette 10ml of barium sulfide aqueous solution to a 500ml volumetric flask, shake well; put V in a 250ml conical flask 2 =5ml iodine standard titration solution (concentration C 2 =0.1010mol / L), 20ml water and 10ml hydrochloric acid solution, adjust the pH of the solution to be neutral or slightly acidic; then accurately pipette 10ml sample solution from the 500ml volumetric flask with a pipette and add it to the 250ml Erlenmeyer flask, while Shake constantly; use a concentration of C 1 =0.05025mol / L sodium thiosulfate standard solution titration, when the solution is titrated to light yellow, add 2ml starch indicator, continue to titrate with sodium thiosulfate standard solution until the blue color disappears, and consume the volume V of sodium thiosulfate 1 = 5.84ml; then pipette 10ml of the sample solution from the 500ml...

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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.

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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Application Information

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IPC IPC(8): G01N31/16G01N21/78
CPCG01N21/78G01N31/16
Inventor 尚方毓王兰君武向前范佩丽李媛张婧
Owner 南风化工(运城)集团有限公司
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