Method for converting ammonium dihydrogen phosphate and measuring content of barium sulfate in barite

A technology of ammonium dihydrogen phosphate and barite, which is applied in the direction of removing certain components and weighing, using precipitation for chemical analysis, etc., can solve the problems of large environmental pollution, slow analysis speed, toxicity, etc. long time effect

Pending Publication Date: 2021-04-23
QIANNAN NORMAL UNIV FOR NATTIES
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Problems solved by technology

The analysis speed of this method is slow, and the CrO4 2- Toxic, high temperature is required in the early stage of sample processing, and it has great environmental pollution

Method used

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  • Method for converting ammonium dihydrogen phosphate and measuring content of barium sulfate in barite
  • Method for converting ammonium dihydrogen phosphate and measuring content of barium sulfate in barite
  • Method for converting ammonium dihydrogen phosphate and measuring content of barium sulfate in barite

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Embodiment 1

[0028] Embodiment 1: a kind of method that adopts ammonium dihydrogen phosphate to convert and measure barium sulfate content in barite, its principle is: utilize barium sulfate and ammonium dihydrogen phosphate to form metaphosphoric acid in combination with barium ion and hydrogen phosphate under high temperature conditions Barium, Sulfate as SO 3 The form is volatilized, and the barium polymetaphosphate is converted into a barium phosphate precipitate through acid, alkali soaking and other treatments, and then the precipitate is dissolved to a constant volume, and an appropriate amount of the solution is added to 50 mL of quinolimonone solution, and the barium phosphate in the barium phosphate is dissolved by hydrochloric acid. Phosphate ions are converted into orthophosphoric acid, and then the mass fraction of barium metaphosphate in the precipitate is calculated through the co-precipitation formed by phosphoric acid and quinolimonone, and then the content of barium sulfat...

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Abstract

The invention discloses a method for converting ammonium dihydrogen phosphate and measuring the content of barium sulfate in barite, wherein the method comprises the steps: barium sulfate in barite and ammonium dihydrogen phosphate are combined with barium ions and hydrogen phosphate radicals at high temperature to form barium metaphosphate, and the sulfate radicals volatilize in the form of SO3; polybarium metaphosphate is converted into barium phosphate precipitate through acid and alkali soaking treatment, then the precipitate is dissolved to a constant volume, a proper amount of the solution is taken, a quemolybdenum citrone solution is added, phosphate ions in barium phosphate are converted into orthophosphoric acid through hydrochloric acid, and then the mass fraction of barium metaphosphate in the precipitate is calculated through co-precipitation formed by phosphoric acid and quemolybdenum citrone; and the content of barium sulfate in barite is calculated by utilizing the molar weight relationship. Although the method is long in analysis time, the influence of coexisting ions is eliminated, and the analysis result is accurate.

Description

technical field [0001] The invention relates to a method for measuring the content of barium sulfate in barite, in particular to a method for converting and measuring the content of barium sulfate in barite by using ammonium dihydrogen phosphate. Background technique [0002] Barite is a non-metallic mineral with barium sulfate as the main component. It has stable chemical properties and is a non-renewable resource. my country's barite reserves rank first in the world. It is one of my country's export advantage mineral products. Barite is widely used Used in oil and natural gas drilling mud weighting agent, paint, barium chemical filler and other fields. [0003] At present, the gravimetric method is commonly used to determine barium sulfate in barite, which is time-consuming and not suitable for time-critical samples. In recent years, there have been few reports on the determination method of barium sulfate in barite at home and abroad, and more traditional gravimetric meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/02G01N5/04
CPCG01N31/02G01N5/04
Inventor 周骏宏赵三慧罗王艳王祥碧韩维玲邹光素王远航林慧芳郭雪付仁杰田小松
Owner QIANNAN NORMAL UNIV FOR NATTIES
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