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

A C5 fraction and quantitative analysis technology, applied in the direction of instruments, scientific instruments, analytical materials, etc., can solve problems such as complex gas paths

Active Publication Date: 2006-09-13
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
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  • Instrument for quantitative analysing micro-alkyne in C5 fraction and its analysing method

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Experimental program
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Effect test

Embodiment 1

[0047] Combine below figure 1 Further explain the gas chromatography analysis instrument of the present invention.

[0048] The gas path of Beifen 3420 gas chromatograph is modified to obtain the analytical instrument of the present invention.

[0049] like figure 1 As shown, the analytical instrument of the present invention includes 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, and an air 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.

[0050] 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 t...

Embodiment 2

[0057] Combine below figure 2 The analytical instrument of the present invention is further explained.

[0058] The gas path of Beifen 3420 gas chromatograph is modified to obtain the analytical instrument of the present invention.

[0059] like figure 2 As shown, the analytical instrument of the present invention comprises a pressure stabilizing valve 7 of a sampler 8, a sampler 8, a column box 6, a first packed column 9, a second packed column 10, a four-way valve 5, and a four-way valve 14. Air resistance 11, air resistance 12, pressure regulator 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 four interfaces on the four-way valve 14 Ports 1', 2', 3' and 4'.

[0060] 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 ...

Embodiment 3

[0067] use figure 1 In the gas circuit shown, the inner diameter of the first packed column is 3 mm, and the column length is 6 meters. The percentage content is 10%; The inner diameter of the second packed column is 3mm, and the column length is 6 meters, and its stationary phase is made up of diethyl azelate stationary liquid and 201 diatomite carrier, and the weight percentage content of stationary liquid is 10 %; The carrier gas is hydrogen, the carrier gas flow rate 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 ℃, and the temperature of the thermal conductivity detector and the hydrogen flame detector is 200°C.

[0068] 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.

[0069] Component

Content (%) ...

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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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IPC IPC(8): G01N30/84G01N30/16G01N30/60G01N30/02
Inventor 石锦文张桂英田保亮田岐阮细强冯海强李宝芹王金利
Owner CHINA PETROLEUM & CHEM CORP
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