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A method for measuring impurities in 2,3,3,3-tetrafluoropropene products by gas chromatography

A technology of gas chromatography and tetrafluoropropene is applied in the field of analysis and determination of impurities in fluorine-containing olefin products, and can solve the problems of difficult separation and the like

Active Publication Date: 2017-08-08
ZHEJIANG RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the research and production of 2,3,3,3-tetrafluoropropene (HFO-1234yf), the product purity and main impurity content of 2,3,3,3-tetrafluoropropene (HFO-1234yf) are the main factors affecting product quality. According to different processes, there may be nearly 20 kinds of impurities with similar properties, which are not easy to separate
But there is no report about HFO-1234yf and its impurity analysis method at home and abroad

Method used

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  • A method for measuring impurities in 2,3,3,3-tetrafluoropropene products by gas chromatography
  • A method for measuring impurities in 2,3,3,3-tetrafluoropropene products by gas chromatography
  • A method for measuring impurities in 2,3,3,3-tetrafluoropropene products by gas chromatography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A 7890A gas chromatograph and FID detector from Agilent were used.

[0030] Firstly, the HFO-1234yf product is prepared into a test sample with methane and 20 kinds of impurities that may be contained. The impurities contained in it are: R1216, R143a, R32, R125, R1225zc, 3,3,3-trifluoropropyne, R1243zf, R245cb, R1225ye(Z), R1234ze(E), R1225ye(E), R134a, R1233xf, R152a, R227ea, R1233zd, R133a, R1234ze(Z), R236ea, and R245eb. Then select the chromatographic conditions as follows:

[0031]

[0032] The prepared test sample is carried by the carrier gas through the selected chromatographic column. The components in the chromatographic column have different distribution coefficients between the mobile phase (carrier gas) and the stationary phase and are separated. After separation, each component enters the Detector; different materials have different characteristics, and the sensor is used to convert the electric quantity signal, and the weak electric quantity signal is...

Embodiment 2

[0037] A 7890A gas chromatograph and FID detector from Agilent were used.

[0038] The same injected sample as in Example 1 was used. After the completion of Example 1, at an interval of 6 hours, select the same chromatographic conditions as in Example 1 to analyze, and the chromatogram is detailed in the attached description. figure 2 . The content of each impurity is calculated using the area normalization method, and the results are as follows:

[0039]

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Abstract

The invention discloses a method for determining impurities in a 2,3,3,3-tetrafluoropropylene product through gas chromatography. Chromatographic conditions comprise a Al2O3 capillary column [(10-200)m * (200-600)[mu]m * (0.2-20)[mu]m] and the like. The method can be used to qualitatively and quantitatively analyze impurities in the 2,3,3,3-tetrafluoropropylene product, and the content thereof.

Description

technical field [0001] The invention relates to a method for analyzing and measuring impurities in fluorine-containing olefin products, in particular to a method for measuring impurities in 2,3,3,3-tetrafluoropropene products by gas chromatography. Background technique [0002] Ozone layer depletion and global warming are two major global environmental issues facing the international community. The research, development and production of a new generation of ODS substitutes with zero ODP and low GWP has become a hot spot of common concern. The ODP value of fluorinated olefins (HFOs) is zero, and the GWP value is also extremely low. When directly emitted, CO 2 The emission reduction rate is greater than 99%, and it has good environmental performance. It is the most important variety for the development of a new generation of ODS substitutes. [0003] As a representative of fluoroolefins (HFOs) products, the molecular formula of 2,3,3,3-tetrafluoropropene (HFO-1234yf) is CF 3...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
Inventor 史婉君方路鬲春利刘宏健郑育欢庞银娟吴伟东王桃燕
Owner ZHEJIANG RES INST OF CHEM IND CO LTD