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Quantitative detection method for impurity content of sulfur monochloride and sulfur dichloride in sulfoxide chloride

A quantitative detection method, sulfur dichloride technology, applied in the measurement of color/spectral characteristics, etc., can solve the problems of poor measurement accuracy and long time, and achieve the effects of accurate results, easy operation and simple system

Active Publication Date: 2018-05-04
石家庄市和合化工化肥有限公司
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Problems solved by technology

[0003] The purpose of this invention is to provide a kind of quantitative detection method of sulfur monochloride and sulfur dichloride content in sulfur oxychloride, to solve existing method in measuring sulfur monochloride and sulfur dichloride in sulfur oxychloride The problem of poor determination accuracy and long time in the total content

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  • Quantitative detection method for impurity content of sulfur monochloride and sulfur dichloride in sulfoxide chloride
  • Quantitative detection method for impurity content of sulfur monochloride and sulfur dichloride in sulfoxide chloride
  • Quantitative detection method for impurity content of sulfur monochloride and sulfur dichloride in sulfoxide chloride

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Embodiment 1

[0027] The used instrument and reagent of this example are: TU-1810PC type ultraviolet-visible spectrophotometer (Beijing General Analysis General Instrument Co., Ltd.); Sulfur monochloride is West Asia reagent (analytical pure); industrial product rectification); carbon tetrachloride is Comeo reagent (analytical pure); thionyl chloride (industrial product).

[0028] The steps of the present invention are as follows:

[0029] (1) Detect the absorption spectrum of sulfur monochloride and sulfur dichloride in the range of 380nm~430nm with ultraviolet spectrophotometer, and draw absorption spectrum curve, the result is as follows figure 1 shown. from figure 1 It can be seen that sulfur monochloride and sulfur dichloride have an isoabsorption point at a wavelength of 388nm, and the absorption of sulfur dichloride at a wavelength of 420nm is not affected by sulfur monochloride, therefore, choose λ 1 = 388nm and λ 2 =420nm is the analysis wavelength.

[0030] (2) Determination ...

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Abstract

The invention discloses a quantitative detection method for the impurity content of sulfur monochloride and sulfur dichloride in sulfoxide chloride. The method comprises the processes that carbon tetrachloride is used as a test solvent; a spectrophotometer is used for respectively measuring the standard curves of sulfur monochloride and sulfur dichloride in analysis wavelengths lambda 1 and lambda2; the absorbancy of each milligram of sulfur monochloride and sulfur dichloride in the analysis wavelengths is obtained; then, the absorbancy A388 and A420 of sulfoxide chloride testing liquid to bemeasured in the wavelengths lambda 1 and lambda 2 is determined; the impurity content of sulfur monochloride and sulfur dichloride in sulfoxide chloride to be measured can be further obtained throughcalculation according to the absorbancy of each milligram of sulfur monochloride and sulfur dichloride in the analysis wavelengths and A388 and A420 values. The quantitative detection method has theadvantages that an isoabsorptive point dual-wavelength spectrophotometric method is used for measuring the content of sulfur monochloride and sulfur dichloride in the sulfoxide chloride; the total detectable rate is 98 percent to 100 percent; the system is simple; the operation is easy; the determination is fast; the result is accurate; the method is applicable to quality control and detection ofsulfoxide chloride products.

Description

technical field [0001] The invention relates to a method for measuring impurities in thionyl chloride products, in particular to a quantitative detection method for impurity content of sulfur monochloride and sulfur dichloride in thionyl chloride. Background technique [0002] Thionyl chloride SOCl 2 It is a fine chemical product widely used in medicine, pesticides, dyes, flavors and fragrances and other fields. The purity of thionyl chloride will have a certain impact on the production of downstream products. At present, sulfur monochloride (i.e. disulfur dichloride, chemical formula: S 2 Cl 2 ) and sulfur dichloride (chemical formula: SCl 2 ) The relevant literature of impurities is less, and it is reported that gas chromatography is used for its determination, but the results obtained are relatively small. The boiling range method is used in the industry standard, but it is very easy to generate azeotrope in the boiling range method, which affects the accuracy of the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33
CPCG01N21/33
Inventor 牛圣操何海超刘敏王川
Owner 石家庄市和合化工化肥有限公司
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