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Method for analyzing mixed alkali in hydrazine hydrate by hydrogen peroxide oxidation method

A hydrogen peroxide and mixed alkali technology, which is used in chemical method analysis, chemical analysis by titration, and material analysis, etc., can solve the problems of high final result of mixed alkali and affect the accuracy of experimental results, so as to make up for the vacancy in the measurement and improve the accuracy. The effect of stable, efficient and accurate detection

Pending Publication Date: 2021-02-05
NINGXIA RISHNEG HIGH NEW IND CO LTD
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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for analyzing the mixed alkali in hydrazine hydrate by the hydrogen peroxide oxidation method, which has the advantages of accurately analyzing the content of each component of the mixed alkali in the crude hydrazine solution, and solves the problem of the traditional double indicator The method is not completely suitable for the determination of the content of mixed alkali in hydrazine hydrate. Hydrazine hydrate is an alkaline solution. When titrated with acid, a part of the acid will react with hydrazine hydrate, which will cause the final result of mixed alkali to be high and affect the accuracy of the experimental results. question

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  • Method for analyzing mixed alkali in hydrazine hydrate by hydrogen peroxide oxidation method
  • Method for analyzing mixed alkali in hydrazine hydrate by hydrogen peroxide oxidation method
  • Method for analyzing mixed alkali in hydrazine hydrate by hydrogen peroxide oxidation method

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Experimental program
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Effect test

Embodiment 1

[0024] Embodiment one: a kind of hydrogen peroxide oxidation method analyzes the method for mixed alkali in hydrazine hydrate, comprises the following steps:

[0025] 1) Prepare samples with known hydrazine content and the content of each component of the mixed alkali, respectively prepare a mixed solution with a hydrazine concentration of 30 to 80 g / L, sodium carbonate of 137 g / L, and sodium hydroxide of 12 g / L;

[0026] ① Use a syringe to draw 36.5mL, 48.7mL, 60.9mL, 73.1mL, 85.3mL and 97.4mL of 821g / L hydrazine solution, and inject them into 1000mL volumetric flasks;

[0027] ②Add 137g of sodium carbonate and 12g of sodium hydroxide in turn to each volumetric flask;

[0028] ③Add water to dilute to the scale, so as to prepare Na2CO3 of 137g / L, NaOH of 12g / L and hydrazine concentrations of 30g / L, 40g / L, 50g / L, 60g / L, 70g / L and 80g / L A mixed solution of hydrazine;

[0029] 2) Take 25mL of the mixed solution in step 1) as the test sample, and add corresponding hydrogen perox...

Embodiment 2

[0033] Embodiment two: a kind of hydrogen peroxide oxidation method analyzes the method for mixed alkali in hydrazine hydrate, comprises the following steps:

[0034] 1) Prepare samples with known hydrazine content and the content of each component of the mixed alkali, respectively prepare a mixed solution with a hydrazine concentration of 30 to 80 g / L, sodium carbonate of 137 g / L, and sodium hydroxide of 12 g / L;

[0035] ① Use a syringe to draw 36.5mL, 48.7mL, 60.9mL, 73.1mL, 85.3mL and 97.4mL of 821g / L hydrazine solution, and inject them into 1000mL volumetric flasks;

[0036] ②Add 137g of sodium carbonate and 12g of sodium hydroxide in turn to each volumetric flask;

[0037] ③Add water to dilute to the scale, so as to prepare Na2CO3 of 137g / L, NaOH of 12g / L and hydrazine concentrations of 30g / L, 40g / L, 50g / L, 60g / L, 70g / L and 80g / L A mixed solution of hydrazine;

[0038] 2) Take 25mL of the mixed solution in step 1) as the test sample, and add corresponding hydrogen perox...

Embodiment 3

[0042] Embodiment three: a kind of hydrogen peroxide oxidation method analyzes the method for mixed alkali in hydrazine hydrate, comprises the following steps:

[0043] 1) Prepare samples with known hydrazine content and the content of each component of the mixed alkali, respectively prepare a mixed solution with a hydrazine concentration of 30 to 80 g / L, sodium carbonate of 137 g / L, and sodium hydroxide of 12 g / L;

[0044] ① Use a syringe to draw 36.5mL, 48.7mL, 60.9mL, 73.1mL, 85.3mL and 97.4mL of 821g / L hydrazine solution, and inject them into 1000mL volumetric flasks;

[0045] ②Add 137g of sodium carbonate and 12g of sodium hydroxide in turn to each volumetric flask;

[0046] ③Add water to dilute to the scale, so as to prepare Na2CO3 of 137g / L, NaOH of 12g / L and hydrazine concentrations of 30g / L, 40g / L, 50g / L, 60g / L, 70g / L and 80g / L A mixed solution of hydrazine;

[0047] 2) Take 25mL of the mixed solution in step 1) as the test sample, and add corresponding hydrogen per...

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Abstract

The invention belongs to the technical field of analysis of mixed alkali in hydrazine hydrate, and discloses a method for analyzing the mixed alkali in hydrazine hydrate by a hydrogen peroxide oxidation method. The method comprises the following steps of: preparing a sample with known hydrazine content and content of each component of mixed alkali; and respectively taking 25mL of the mixed solution as experiment samples, and adding corresponding hydrogen peroxide into the experiment samples according to different hydrazine contents; According to the method for analyzing the mixed alkali in thehydrazine hydrate through the hydrogen peroxide oxidation method, the hydrazine hydrate in the solution is oxidized by adding the hydrogen peroxide, interference of the hydrazine hydrate on titrationof the mixed alkali is eliminated; then a double-indicator method is adopted, titration is conducted through a standard hydrochloric acid solution, and the content of all components of the mixed alkali is calculated according to the amount of consumed acid under two different indicators. The detection method not only improves the determination accuracy of the content of the mixed alkali in the hydrazine hydrate, but also makes up the determination vacancy of the mixed alkali in the hydrazine hydrate industry, and achieves the effect of efficiently and accurately detecting the content of eachcomponent of the mixed alkali in the hydrazine hydrate.

Description

technical field [0001] The invention relates to the technical field of analyzing mixed alkalis in hydrazine hydrate, in particular to a method for analyzing mixed alkalis in hydrazine hydrate by a hydrogen peroxide oxidation method. Background technique [0002] Sodium chloride, sodium carbonate and sodium hydroxide are mainly contained in the thick hydrazine hydrate solution prepared by urea method, for the mixed alkali of sodium carbonate and sodium hydroxide, do not find the report about the mixed alkali content analysis method in hydrazine hydrate at present, and There are many analysis methods for simple mixed alkalis. The analysis method often used in the laboratory is the double indicator method to determine the content of each component. After titration until the solution is colorless, record the titration volume as V1mL, then add methyl orange indicator, continue to titrate with hydrochloric acid standard solution until the solution turns from yellow to orange, and ...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N1/28
CPCG01N1/28G01N31/162
Inventor 柯超前赵现营左光亮
Owner NINGXIA RISHNEG HIGH NEW IND CO LTD
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