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Method for detecting contents of potassium carbonate and potassium bicarbonate in desulfuration solution

A desulfurization solution, potassium bicarbonate technology, applied in the direction of material electrochemical variables, etc., can solve the problems of time-consuming, complicated operation, multi-chemical reagents, etc., and achieve the effect of simple operation, high accuracy and stability

Inactive Publication Date: 2014-10-08
PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] At present, the method for detecting the content of potassium carbonate and potassium bicarbonate in desulfurized lean liquid and desulfurized rich liquid is usually a double indicator titration method. However, the accuracy and stability of the detection results of this method are poor, and there are complex operations and time-consuming and the disadvantages of consuming more chemical reagents

Method used

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  • Method for detecting contents of potassium carbonate and potassium bicarbonate in desulfuration solution
  • Method for detecting contents of potassium carbonate and potassium bicarbonate in desulfuration solution
  • Method for detecting contents of potassium carbonate and potassium bicarbonate in desulfuration solution

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example 1

[0039] (1) Instruments and reagents used

[0040] Instrument: ZDJ-4A type automatic potentiometric titrator, E-201-C-9 type pH composite electrode.

[0041] Reagent: hydrochloric acid standard solution, c(HCl)=0.2000mol / L; standard buffer solution with pH 4.0 and 6.864.

[0042] (2) Calibration

[0043] First, start the automatic potentiometric titrator and preheat it for more than 10 minutes to make it stable.

[0044] Then, use a standard buffer solution with a pH of 6.864 for positioning, then use a standard buffer solution with a pH of 4.0 for positioning, and then use a standard buffer solution with a pH of 6.864 for positioning, so that the value displayed by the instrument is consistent with the pH value of the buffer solution .

[0045] (3) Determination

[0046] Prepare the sample solution: Measure 5ml of the desulfurization solution sample with a pipette and place it in a 100ml beaker, add CO2-free 2 Dilute to 30ml with distilled water, and place the beaker on t...

example 2

[0051] (1) Instruments and reagents used

[0052] Instrument: ZDJ-4A type automatic potentiometric titrator, E-201-C-9 type pH compound electrode.

[0053] Reagent: hydrochloric acid standard solution, c(HCl)=0.1000mol / L; standard buffer solution with pH 4.0 and 6.864.

[0054] (2) Calibration

[0055] First, start the automatic potentiometric titrator and preheat it for more than 10 minutes to make it stable.

[0056] Then, use a standard buffer solution with a pH of 6.864 for positioning, then use a standard buffer solution with a pH of 4.0 for positioning, and then use a standard buffer solution with a pH of 6.864 for positioning, so that the value displayed by the instrument is consistent with the pH value of the buffer solution .

[0057] (3) Determination

[0058] Prepare the sample solution: Measure 5ml of the desulfurization solution sample with a pipette and place it in a 100ml beaker, add CO2-free 2 Dilute to 50ml with distilled water, and place the beaker on th...

example 3

[0063] (1) Instruments and reagents used

[0064] Instrument: ZDJ-4A type automatic potentiometric titrator, E-201-C-9 type pH composite electrode.

[0065] Reagent: hydrochloric acid standard solution, c(HCl)=0.5000mol / L; standard buffer solution with pH 4.0 and 6.864.

[0066] (2) Calibration

[0067] First, start the automatic potentiometric titrator and preheat it for more than 10 minutes to make it stable.

[0068] Then, use a standard buffer solution with a pH of 6.864 for positioning, then use a standard buffer solution with a pH of 4.0 for positioning, and then use a standard buffer solution with a pH of 6.864 for positioning, so that the value displayed by the instrument is consistent with the pH value of the buffer solution .

[0069] (3) Determination

[0070] Prepare the sample solution: Measure 5ml of the desulfurization solution sample with a pipette and place it in a 100ml beaker, add CO2-free 2 Dilute to 40ml with distilled water, and place the beaker on t...

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Abstract

The invention provides a method for detecting the contents of potassium carbonate and potassium bicarbonate in a desulfuration solution. The method comprises the steps of preparing a sample solution of a desulfuration solution; by using an automatic potentiometric titrator, titrating the sample solution through a hydrochloric acid standard solution, and judging an equivalent point of a chemical reaction by using an inflection point of a potentiometric titration curve according to the jump of a potential of an electrode so as to figure out the contents of potassium carbonate and potassium bicarbonate in the sample solution by using an equation (1) and an equation (2), namely c(K2CO3)=c(HCl)*V1*138 / V, and c(KHCO3)=c(HCl)*(V2-2V1)*100 / V. According to The method for detecting the contents of potassium carbonate and potassium bicarbonate in the desulfuration solution, provided by the invention, the operation is simple and convenient, an indicator is not needed, and the accuracy and the stability of a detection result are high because the judgment of a titration end point cannot be disturbed by the color of the desulfuration solution.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection of desulfurization solution, in particular, the invention relates to a method for detecting content of potassium carbonate and potassium bicarbonate in desulfurization solution. Background technique [0002] The coke oven gas purification process mainly includes steps such as condensing blast, ammonium sulfate, final cold washing of benzene, desulfurization, sulfur recovery, and crude benzene distillation. Bottom-up contact with the lean liquid (for example, potassium carbonate solution) from the regeneration tower countercurrently, so that the H in the gas 2 Acid gases such as S and HCN are absorbed. The following chemical reactions mainly occur in the desulfurization process: [0003] K 2 CO 3 +H 2 S→KHCO 3 +KHS [0004] K 2 CO 3 +HCN→KCN+KHCO 3 [0005] K 2 CO 3 +CO 2 +H 2 O→2KHCO 3 [0006] At the same time, NaOH solution can be added to the upper section of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/42
Inventor 陈学康王建明李东阳陈荣
Owner PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
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