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Instrument for quantitative analysing micro-alkyne in C5 fraction and its analysing method

A technology for quantitative analysis of carbon five fractions, which can be used in instruments, scientific instruments, analytical materials, etc., and can solve problems such as complex gas paths.

Active Publication Date: 2008-01-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing domestic cracking C5 separation devices can only quantitatively analyze trace alkynes in chemical grade and polymer grade isoprene products with few components, and the gas path is complicated, requiring four chromatographic columns and two six-way valves

Method used

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  • Instrument for quantitative analysing micro-alkyne in C5 fraction and its analysing method
  • Instrument for quantitative analysing micro-alkyne in C5 fraction and its analysing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The gas chromatographic analysis instrument of the present invention will be further explained below in conjunction with FIG. 1 .

[0050] The gas path of Beifen 3420 gas chromatograph is modified to obtain the analytical instrument of the present invention.

[0051] As shown in Figure 1, the analysis instrument of the present invention comprises the pressure-stabilizing valve 7 of injector 8, injector 8, column box 6, the first packed column 9, the second packed column 10, four-way valve 5, Gas resistance 11, gas resistance 12, pressure regulator valve 13, hydrogen flame detector and thermal conductivity detector, four ports 1, 2, 3 and 4 are provided on the four-way valve 5.

[0052] The pressure stabilizing valve 7 is connected to the injector 8, the first packed column 9 and the second packed column 10 are placed in the column box 6, one end of the packed column 9 is connected to the injector 8, and the other end is connected to the interface 1, One end of the pack...

Embodiment 2

[0059] The analysis instrument of the present invention will be further explained below in conjunction with FIG. 2 .

[0060] The gas path of Beifen 3420 gas chromatograph is modified to obtain the analytical instrument of the present invention.

[0061] As shown in Figure 2, the analytical instrument of the present invention comprises a pressure stabilizing valve 7 of a sample injector 8, a sample injector 8, a column box 6, a first packed column 9, a second packed column 10, a four-way valve 5, Four-way valve 14, gas resistance 11, gas resistance 12, pressure stabilizing valve 13, hydrogen flame detector and thermal conductivity detector, there are four interfaces 1, 2, 3 and 4 on the four-way valve 5, and There are four interfaces 1', 2', 3' and 4'.

[0062] The pressure stabilizing valve 7 is connected to the injector 8, the packed column 9, the packed column 10 and the four-way valve 14 are placed in the column box 6, the injector 8 is connected to the port 2', and one e...

Embodiment 3

[0069] Using the gas path shown in Figure 1, the inner diameter of the first packed column is 3 mm, and the column length is 6 meters. The weight percentage content of liquid is 10%; The inner diameter of the second packing column is 3mm, and column length is 6 meters, and its stationary phase is made up of diethyl azelate stationary liquid and 201 diatomaceous earth carrier, and the weight percentage of stationary liquid The content is 10%; the carrier gas is hydrogen, the flow rate of the carrier gas of the two packed columns is 45ml / min, the flow rate of the auxiliary gas is 45ml / min, the temperature of the injector is 200°C, the thermal conductivity detector and the hydrogen flame detector The temperature is 200°C.

[0070] In order to illustrate the analytical method of the present invention, the carbon five fraction material shown in Table 3 is analyzed as a sample, which contains a trace amount of alkynes. The injection volume was 2 microliters.

[0071] Table 3 The m...

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Abstract

A method for carrying out quantitative analysis on trace amount of alkyne in C5 fraction includes using polarity packed column to separate alkyne out from C5 fraction then cutting said alkyne into weak polarity or nonpolarity packed column for separating out each alkyne composition in packed column, finally applying external standard manner to carry out quantitative analysis on content of alkyne. The gas - phase chromatographic analyzer for realizing said method is also disclosed.

Description

technical field [0001] The invention relates to an instrument and method for quantitatively analyzing trace impurities by gas chromatography, in particular, the present invention relates to an instrument and method for quantitatively analyzing trace alkynes by gas chromatography. Background technique [0002] The cracked C5 fraction is an important by-product of petroleum cracking. With the expansion of cracking ethylene units and the shrinking space for improving the economic benefits of ethylene units, how to use cracking C5 fractions has attracted more and more attention. Separation of cracked C5 fractions into various products such as chemical grade isoprene, polymer grade isoprene, piperylene, dicyclopentadiene and other products is one of the methods for efficient utilization of C5 fractions. However, whether it is C5 raw materials, products, or the intermediate link of C5 separation process, the alkynes they contain are key control indicators. Since the C5 fraction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/46
Inventor 石锦文张桂英田保亮田歧阮细强冯海强李宝芹王金利
Owner CHINA PETROLEUM & CHEM CORP
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