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Method for detecting vanadium and ammonium contents in metavanadate solution

A technology of metavanadate and metavanadate, which is applied in measuring devices, chemical method analysis, chemical analysis by titration method, etc., can solve the problem of ineffective detection of vanadium and ammonium content, and achieve low cost effect

Inactive Publication Date: 2019-04-16
DALIAN RONGKE ENERGY STORAGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a method for detecting the content of vanadium and ammonium in the metavanadate solution, which can quickly and accurately realize Detection of vanadium and ammonium content

Method used

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  • Method for detecting vanadium and ammonium contents in metavanadate solution
  • Method for detecting vanadium and ammonium contents in metavanadate solution
  • Method for detecting vanadium and ammonium contents in metavanadate solution

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Embodiment 1

[0036] This embodiment discloses a method for detecting vanadium and ammonium content in a metavanadate solution, and the specific steps are as follows:

[0037] Take without NH 4 + Solution sample A 2.00mL, add water to 150mL, dilute with water for easy stirring and pH Detection, the main components of solution sample A are sodium sulfate and sodium metavanadate, using a Mettler-Toledo T50 potentiometric titrator, pH electrode, and using 0.5165mol / L sodium hydroxide solution as a standard titration solution for single breakthrough Titrate, consume standard titration solution volume 4.423mL, (titration curve such as figure 1 Shown) can be calculated that the metavanadate concentration of solution is:

[0038]

[0039] Where V is the volume of sample A to be tested.

[0040] Titration curve as figure 1 As shown, there is a breakthrough in the figure, which represents the breakthrough when the sodium metavanadate solution is titrated with sodium hydroxide and vanadium...

Embodiment 2

[0042] This embodiment discloses a method for detecting vanadium and ammonium content in a metavanadate solution, and the specific steps are as follows:

[0043] Take without NH 4 + Solution sample B 2.00mL, the main components of solution sample B are sodium sulfate and sodium metavanadate, add water to 150mL, use Mettler-Toledo T50 potentiometric titrator, pH electrode, with 0.5165mol / L sodium hydroxide The solution is used as a standard titration solution for single-surpass titration, and the volume of the standard titration solution is 7.531mL, and the metavanadate concentration of the solution can be calculated as:

[0044]

[0045] Where V is the volume of sample B to be tested.

Embodiment 3

[0047] This embodiment discloses a method for detecting vanadium and ammonium content in a metavanadate solution, and the specific steps are as follows:

[0048] NH 4 + Solution sample C (the main components are sulfuric acid and ammonium sulfate) 2.00mL, add water to 150mL, use Mettler-Toledo T50 potentiometric titrator 0.5165mol / L sodium hydroxide solution as the standard titration solution for double breakthrough titration, consumption Standard titration solution volume is respectively VEQ1=4.883mL, VEQ2=4.732mL, (titration curve such as figure 2 shown) can calculate the free H of the solution + and NH 4 + Concentrations are:

[0049]

[0050]

[0051] Where V is the volume of the sample C to be tested.

[0052] Titration curve as figure 2 As shown, there are two transitions in the figure, the first transition is the reaction of NaOH and free hydrogen, and the second transition is the reaction of NH 4 + Reaction with NaOH.

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Abstract

The invention provides a method for detecting the vanadium and ammonium contents in a metavanadate solution. The method comprises the following steps: carrying out titration on the solution to be detected through a sodium hydroxide standard solution to reach a first jump, and recording the volume of the consumed sodium hydroxide standard solution V1; adding hydrogen peroxide into the solution to be detected, carrying out titration on the solution to be detected through the sodium hydroxide standard solution to reach a second jump, and recording the volume of the consumed sodium hydroxide standard solution V2; adjusting the pH value of the solution to be detected, carrying out titration on the solution to be detected through the sodium hydroxide standard solution to reach a third jump, andrecording the volume of the consumed sodium hydroxide standard solution V3; and calculating the metavanadate concentration, the ammonium concentration and the total vanadium concentration in the solution to be detected according to the following formulas: the metavanadate concentration = V2 x C<NaOH>, the ammonium concentration = (V1-V2) x C<NaOH>, and the total vanadium concentration = (V3+V2-V1)x C<NaOH>. The method provided by the invention has the advantage that the vanadium and ammonium contents can be rapidly and accurately detected.

Description

technical field [0001] The invention relates to detection technology in the fields of vanadium hydrometallurgy and chemistry, in particular to a method for detecting the content of vanadium and ammonium in metavanadate solution. Background technique [0002] At present, there are many methods for the determination of ammonium content in solution, including titration after distillation (arbitration method), formaldehyde method, Nessler's reagent spectrophotometry, ion chromatography, ion selective electrode method, capillary electrophoresis, etc. Among them, the post-distillation titration method is cumbersome and time-consuming, and the distillation speed and distillation volume will affect the detection results, which must be controlled. If the distillation speed is too fast, the distilled ammonia gas will not be absorbed in time and overflow; if the distillation volume in the receiving bottle increases, the pH of the solution will increase, which will inevitably cause titr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
CPCG01N31/164
Inventor 刘月菊宋明明曾繁武姜雪莲王楠丁琳
Owner DALIAN RONGKE ENERGY STORAGE GRP CO LTD