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Method for testing and analyzing hexafluoropropylene

A hexafluoropropylene, testing and analysis technology, applied in the field of hexafluoropropylene content determination, can solve the problems of low technical standards, complex oxygen content, inaccuracy, etc., and achieve the effect of improving the analysis accuracy

Inactive Publication Date: 2011-06-08
屠国强
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Problems solved by technology

[0004] At present, the technical standards used in the known testing and analysis methods for hexafluoropropylene are low, and there are disadvantages of complex and inaccurate oxygen content analysis by cylinder sampling

Method used

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  • Method for testing and analyzing hexafluoropropylene
  • Method for testing and analyzing hexafluoropropylene
  • Method for testing and analyzing hexafluoropropylene

Examples

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Embodiment Construction

[0022] First embodiment of the present invention:

[0023] Test and analyze hexafluoropropylene as follows:

[0024] 1) Filling of the chromatographic column: plug one end of the chromatographic column tube with a little glass wool, and connect this end to the exhaust system. Under gentle vibration, put the stationary phase into the chromatographic column from the other end through the funnel, About 4g / m2;

[0025] 2) Aging of the chromatographic column: aging at 120°C for 8 hours under the passage of carrier gas;

[0026] 3) Select the following conditions to obtain a suitable degree of separation:

[0027]

[0028] 4) Sampling: Sampling hexafluoropropylene with a small steel cylinder or an air bag lined with a metal film on the inner wall.

[0029] 5) Determination: After starting the gas chromatograph, make necessary adjustments to make the instrument reach a suitable condition and stabilize it for several minutes before proceeding;

[0030] 6) Calculation: The conte...

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Abstract

The invention relates to a method for measuring the content of hexafluoropropylene, in particular to a method for testing and analyzing hexafluoropropylene which is prepared by tetrafluoroethylene through thermal cracking, rectification and purification. The method comprises the following steps of: (1) filling a chromatographic column; (2) aging the chromatographic column; (3) selecting proper conditions to obtain a proper resolution; (4) sampling; (5) measuring; (6) calculating; (7) using the arithmetic mean of two measuring results as an analysis result; and (8) using the same instrument by the same operator, carrying out experiments on the same sample under the same operation condition in normal and correct operation methods, and ensuring that the difference of the two measuring results is not more than 0.1%. The invention has the beneficial effects that impurities are effectively separated by adopting the analysis method, analysis precision is increased, and the method has excellent effects.

Description

technical field [0001] The invention relates to a method for determining the content of hexafluoropropylene, in particular to a method for testing and analyzing hexafluoropropylene prepared from tetrafluoroethylene through thermal cracking and rectification purification. Background technique [0002] The molecular formula of hexafluoropropylene is C 3 f 6 [0003] Relative molecular mass: 150. [0004] Currently, the known testing and analysis methods for hexafluoropropylene use low technical standards, and have the disadvantages of complex and inaccurate oxygen content sampling and analysis by steel cylinders. Contents of the invention [0005] The present invention relates to the test and analysis method of hexafluoropropylene. Specifically, in the present invention, the determination of hexafluoropropylene content is to pass the chromatographic column after the gas or liquid of the hexafluoropropylene sample is vaporized, so that the components to be measured are sep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/66G01N30/56
Inventor 屠国强
Owner 屠国强
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