Method for measuring active concentration of sodium naphthalin treatment solution

A technology for treating liquid and sodium naphthalene, which is applied in the field of sodium naphthalene complexes, can solve the problems of no effective detection method, etc., and achieve the effect of reasonable method design, fast analysis speed and good reproducibility

Inactive Publication Date: 2008-08-20
JUHUA GRP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no effective detection method at home and abroad for the dete

Method used

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  • Method for measuring active concentration of sodium naphthalin treatment solution

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Embodiment 1

[0051] Under the condition of isolating air and moisture, use dichloroethane to react with sodium naphthalene treatment solution at a reaction temperature of 40°C and a reaction time of 5 minutes. Add 50ml tertiary pure water, adjust the pH to 6 with sulfuric acid, and extract the resulting product with water. Sodium chloride, the extraction time is 1min, the sodium chloride in the aqueous solution is titrated with silver nitrate standard solution, and the concentration of sodium naphthalene treatment solution activity is calculated based on the consumption of silver nitrate standard solution V1. Sodium naphthalene treatment solution and dichloroethane The weight-to-volume ratio is 0.2:2,

[0052] Calculation of activity concentration of sodium naphthalene treatment solution:

[0053] X=(V1-V2)×C / m=(6.98-0.02)×0.1010 / 0.2051=3.43mol / kg

Embodiment 2

[0055] Under the condition of isolating air and water vapor, use trichloroethane as a dechlorination agent to react with sodium naphthalene treatment solution, reaction temperature 70℃, reaction time 15min, add 50ml tertiary pure water, adjust the pH value to 10 with nitric acid, The sodium chloride produced by water extraction, the extraction time is 5 minutes, the sodium chloride in the aqueous solution is titrated with silver nitrate standard solution, and the active concentration of sodium naphthalene treatment solution is calculated according to the consumption of silver nitrate standard solution V1. The weight-to-volume ratio of trichloroethane is 2:2,

[0056]Calculation of activity concentration of sodium naphthalene treatment solution:

[0057] X=(V1-V2)×C / m=(7.89-0.03)×0.1010 / 2.005=0.40mol / kg

Embodiment 3

[0059] Under the condition of isolating air and water vapor, use chloroform as a dechlorinating agent to react with sodium naphthalene treatment solution at a reaction temperature of 50°C and a reaction time of 10 minutes. Add 50ml tertiary pure water, adjust the pH to 10 with acetic acid, and use water The sodium chloride produced by extraction, the extraction time is 5 minutes, the sodium chloride in the aqueous solution is titrated with silver nitrate standard solution, and the active concentration of sodium naphthalene treatment solution is calculated according to the consumption of silver nitrate standard solution V1. The weight-to-volume ratio of methyl chloride is 1:2,

[0060] Calculation of activity concentration of sodium naphthalene treatment solution:

[0061] X=(V1-V2)×C / m=(7.86-0.05)×0.1010 / 1.012=0.78mol / kg

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Abstract

The invention discloses a testing method of sodium-naphthalene solution active concentration. In the absence of air and water, hydrochloric ether is used as dechlorinating agent to act with sodium-naphthalene solution, reaction temperature is 40-70 DEG C, reaction time is 5-15 minutes, sodium chloride is generated, at pH 6-10, sodium chloride is generated with water extraction, extraction time is 1-5 minutes, titrate sodium chloride in water solution with silver nitrate titrating solution, sodium-naphthalene solution active concentration is calculated according the consumption of silver nitrate standard solution. The invention has advantages of scientific test principle, reasonable design method, simple acquired method, simple test operation, which can be completed within 10-15 minutes and fast analysis speed, the relative standard deviation is less than 2%, the test result has good reproduction quality, and the test method is effective and practical.

Description

Technical field [0001] The invention relates to a sodium naphthalene complex, in particular to a method for measuring the active concentration of a sodium naphthalene treatment solution. Background technique [0002] Polytetrafluoroethylene material (hereinafter referred to as PTFE) is a high-performance polymer material with excellent chemical stability, electrical insulation, extremely low dynamic friction coefficient, non-flammable, chemical corrosion resistance and high mechanical strength. It is considered to be one of the most suitable solid materials. However, PTFE has poor wettability and cannot be infiltrated by the adhesive, which limits its application range. Using sodium naphthalene treatment liquid to chemically treat PTFE products can improve the surface activity of PTFE products, reduce contact angles, and increase surface energy, thereby significantly improving adhesion and wettability, thereby expanding its application range. [0003] The surface treatment of PTF...

Claims

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Application Information

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IPC IPC(8): G01N31/16G06F19/00
Inventor 童闻亮
Owner JUHUA GRP
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