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Calculating method for dilution ratio of reaction liquid while researching nucleation rate of ion crystallization reaction

A technology of ion crystallization and nucleation rate, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of not giving the calculation method of dilution factor or the way to obtain it, and affecting the accuracy of the nucleation rate of ion crystallization reaction, so as to reduce The number of experiments, saving time, and the effect of simple calculation formulas

Active Publication Date: 2019-01-11
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

In either case, it will affect the accuracy of the determination of the nucleation rate of the ion crystallization reaction.
[0005] Although the prior art gives the degree of supersaturation after the mixture of the reaction mixture and the diluent when the ion crystallization reaction occurs, it does not give the calculation method of the dilution factor or the way to obtain it

Method used

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  • Calculating method for dilution ratio of reaction liquid while researching nucleation rate of ion crystallization reaction
  • Calculating method for dilution ratio of reaction liquid while researching nucleation rate of ion crystallization reaction
  • Calculating method for dilution ratio of reaction liquid while researching nucleation rate of ion crystallization reaction

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Embodiment 1

[0026] 1) Prepare a certain volume of 0.1mol / L hydrazine nitrate + 0.05, 0.07, 0.09, 0.15, 0.20, 0.30mol / LH 2 SO 4 +0.1mol / L oxalic acid as diluent.

[0027] 2) At 25°C, 15.0 mL of the first reaction solution (0.05, 0.07, 0.09, 0.15, 0.20, 0.30 mol / L ferrous sulfate+0.1 mol / L hydrazine nitrate solution) and 15.0 mL of the second reaction solution were respectively reacted. Liquid (corresponding to 0.25, 0.27, 0.29, 0.35, 0.40, 0.50mol / L oxalic acid + 0.1mol / L hydrazine nitrate solution) was added to figure 1 Two feeders 2 are shown.

[0028] 3) On the basis of measuring the relevant concentration values ​​(C Aa+ is the concentration of ferrous sulfate in the first reaction solution, C Bb- is the concentration of oxalic acid in the second reaction solution; at a constant temperature of 25 °C, after mixing the first reaction solution and the second reaction solution in equal volumes in a beaker until the equilibrium of dissolution and precipitation is reached, measure the fe...

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Abstract

The invention belongs to the technical field of chemical reaction kinetics and relates to a calculating method for the dilution ratio of a reaction liquid while researching nucleation rate of ion crystallization reaction. The dilution ratio means the dilution ratio of a diluent to a mixed reaction liquid when no new crystal nucleus forms and no formed crystal nucleus dissolves under the conditionthat the diluent is used for diluting after crystal nucleus is generated by instantly isopyknic mixing a first reaction liquid with Aa+ ion concentration of CAa+ and a second reaction liquid with Bb-ion concentration of CBb- under a certain constant temperature. The calculating method comprises the following steps: (1) mixing equal volume of first reaction liquid and second reaction liquid undera certain constant temperature, and then measuring the concentrations CAa+equ and CBb-equ of Aa+ ions and Bb- ions in the mixed reaction liquid when dissolution-precipitation balance is achieved; (2)utilizing a formula to calculate the dilution ratio N. The calculating method provided by the invention can be utilized to calculate the dilution ratio of the appropriate mixed reaction liquid.

Description

technical field [0001] The invention belongs to the technical field of chemical reaction kinetics, and relates to a method for calculating the dilution ratio of a reaction solution when studying the nucleation rate of an ion crystallization reaction. Background technique [0002] mA for ionic precipitation a+ +nB b- ->A m B n , containing two precipitated ions A, respectively a+ and B b- After mixing the two reaction liquids, precipitate particles A are instantly generated in the reaction mixture under the action of supersaturation m B n . Precipitated particles A generated per unit volume and unit time in the reaction mixture m B n The total number of ions is the nucleation rate of the ion crystallization reaction, in units / m 3 ·s. [0003] The magnitude of the nucleation rate of the ionic crystallization reaction is related to A a+ and B b- The respective concentrations are related when mixing. When the nucleation rate of the ion crystallization reaction w...

Claims

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Application Information

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IPC IPC(8): G01N33/00
CPCG01N33/00
Inventor 李传博晏太红郑卫芳
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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