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Automatic titration method of aluminium oxide, caustic alkali and carbon alkali in sodium aluminate solution

An automatic titration, alumina technology, applied in the direction of chemical analysis by titration, can solve the problems of environmental damage, large electrode damage, complicated analysis methods, etc., to improve speed and accuracy, avoid errors, and simplify the analysis process and steps. Effect

Active Publication Date: 2019-01-11
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

) research shows that Australian analysis methods are more cumbersome and slower
At the same time, this method uses fluoride as a complexing accelerator, which will cause great damage to the electrode, greatly shorten the service life of the electrode, increase the cost of analysis and detection, and cause certain damage to the environment.

Method used

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  • Automatic titration method of aluminium oxide, caustic alkali and carbon alkali in sodium aluminate solution
  • Automatic titration method of aluminium oxide, caustic alkali and carbon alkali in sodium aluminate solution

Examples

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Effect test

Embodiment 1

[0030] A kind of automatic titration method of alumina, caustic alkali and carbon alkali in a sodium aluminate solution, the steps are as follows:

[0031] (1) Preparation of reagent A: use a pipetting device to accurately pipette or weigh a certain amount of acid solution, and configure it as H + Acid solution with a concentration of 0.1mol / L and calibrated;

[0032] (2) Preparation of reagent B: Weigh a certain mass of aluminum complexing agent and carbonate + sodium hydroxide mixed reagent in a ratio of 1:0.05, put it into a beaker and dissolve it with distilled water or deionized water. Water ethanol, transfer the solution in the beaker to a constant volume flask;

[0033] (3) Sampling and dilution of sodium aluminate solution: use a pipetting device to take 5ml (expressed as V 1 ) The sodium aluminate solution to be tested is transferred into a 100ml volumetric flask, and the volume is determined with one of distilled water or deionized water;

[0034] (4) Potential au...

Embodiment 2

[0055] A kind of automatic titration method of alumina, caustic alkali and carbon alkali in a sodium aluminate solution, the steps are as follows:

[0056] (1) Preparation of reagent A: use a pipetting device to accurately pipette or weigh a certain amount of acid solution, and configure it as H + Acid solution with a concentration of 0.2mol / L and calibrated;

[0057] (2) Preparation of reagent B: Weigh a certain mass of aluminum complexing agent and carbonate + sodium hydroxide mixed reagent in a ratio of 1:0.5, put it into a beaker and dissolve it with distilled water or deionized water. Water ethanol, transfer the solution in the beaker to a constant volume flask;

[0058] (3) Sampling and dilution of sodium aluminate solution: use a pipetting device to take 1ml (expressed as V 1 ) The sodium aluminate solution to be tested is transferred into a 100ml volumetric flask, and the volume is determined with one of distilled water or deionized water;

[0059] (4) Potential aut...

Embodiment 3

[0080] A kind of automatic titration method of alumina, caustic alkali and carbon alkali in a sodium aluminate solution, the steps are as follows:

[0081] (1) Preparation of reagent A: use a pipetting device to accurately pipette or weigh a certain amount of acid solution, and configure it as H + Acid solution with a concentration of 0.5mol / L and calibrated;

[0082] (2) Preparation of reagent B: Weigh a certain mass of aluminum complexing agent and carbonate + sodium hydroxide mixed reagent in a ratio of 1:0.2, put it into a beaker and dissolve it with distilled water or deionized water. After dissolving, add 10ml of Water ethanol, transfer the solution in the beaker to a constant volume flask;

[0083] (3) Sampling and dilution of sodium aluminate solution: use a pipetting device to take 5ml (expressed as V 1 ) The sodium aluminate solution to be tested is transferred into a 100ml volumetric flask, and the volume is determined with one of distilled water or deionized wate...

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Abstract

The invention relates to an automatic titration method of aluminium oxide, caustic alkali and carbon alkali in a sodium aluminate solution. The method comprises the following steps: (1) preparing a reagent A being an acid solution; (2) preparing a reagent B being a mixed reagent of an aluminum complexing agent and carbonate + sodium hydroxide; (3) taking a V1 sodium aluminate solution to be tested, moving the V1 sodium aluminate solution to be tested into a constant volume utensil, and carrying out constant volume operation by using one of distilled water or deionized water; (4) taking a V2 diluted sodium aluminate solution to be tested, placing the same in a titration cup, and placing a pH electrode to start the titration, wherein the titrating solution is the reagent A; titrating to pH 10-11 to obtain a titration volume T1; adding the reagent B to form a secondary titration solution, continuing the titration until the pH value is 10-11 to obtain a second titration volume T2; and continuing the titration until the pH value is 8-9 to obtain a third titration volume T3; and (5) performing numerical calculation. According to the method, no fluorine auxiliary agent is added, the concentrations of the aluminium oxide, caustic alkali and carbon alkali in the sodium aluminate solution can be analyzed quickly and automatically, and the detection speed and precision of the sodium aluminate solution are improved.

Description

technical field [0001] The invention belongs to the field of chemical analysis methods for chemical components in the industrial production process of alumina, and mainly relates to an automatic titration device and method for alumina, caustic alkali and carbon alkali in a sodium aluminate solution during alumina production and scientific research. Background technique [0002] Sodium aluminate solution is an important carrier in the production process of alumina, mainly composed of NaOH-NaAl(OH) 4 The solution, which runs through the entire alumina production process, mainly includes circulating alkali, leaching solution, semen, mother liquor, evaporation mother liquor, etc. The composition of these sodium aluminate solutions is an important indicator of alumina production, and the control of the concentration of sodium aluminate solution in each stage of production is very important, so it is important to quickly and accurately determine the content of each component. At ...

Claims

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Application Information

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IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 李来时吴玉胜
Owner SHENYANG POLYTECHNIC UNIV