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Online chromatographic analysis device

A chromatographic analysis and analytical column technology, which is applied in measurement devices, analytical materials, material separation, etc., can solve the problems that non-aromatic and aromatic hydrocarbon mixtures cannot be analyzed at the same time, water interference, etc., and achieve the effect of avoiding water interference and achieving good technical effects.

Active Publication Date: 2012-05-30
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is the problem that hydrogen / permanent gas, non-aromatic and aromatic hydrocarbon mixtures cannot be analyzed at the same time and the problem of water interference in the analysis of water-containing reaction systems in the existing chromatographic analysis technology. A new online chromatographic analysis technology is provided. Analyzer

Method used

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Effect test

Embodiment 1

[0036] use figure 1 The online chromatographic analysis device shown in the figure analyzes the standard mixed gas, and the typical chromatographic analysis conditions are shown in Table 1. Among them, standard gas 2 # As the sample to be tested, and with 1 # Calibration gas as a standard, for 2 # The standard gas has been quantitatively calculated by the appearance method and the correlation method. The composition and analysis results of the standard samples are shown in Table 2.

[0037] Table 1 Typical chromatographic analysis conditions

[0038]

[0039] Table 2 Standard gas analysis results

[0040]

Embodiment 2

[0042] use figure 1 The shown online chromatographic analysis device analyzes self-prepared styrene standard samples (about 70% water content by mass ratio). The typical online chromatographic analysis conditions are shown in Table 3, and the standard sample composition and analysis results are shown in Table 4.

[0043] Table 3 Typical chromatographic analysis conditions

[0044]

[0045] Table 4 Analysis results of standard samples

[0046]

Embodiment 3

[0048] use figure 1 The online chromatographic analysis device shown is for online chromatographic analysis of the styrene catalyst evaluation reaction product. The reaction product consists of hydrogen (a small amount), water (accounting for about 70% of the total product mass), C1-C4 light hydrocarbons, C5 and C6 non- Aromatic, styrene and other aromatic hydrocarbons. The typical online chromatographic analysis conditions are the same as Table 3, and the typical chromatograms are shown in figure 2 , and the analysis results are shown in Table 5.

[0049] The online chromatographic analysis device of the present invention is used to carry out automatic online analysis of actual samples, and perform relevant processing and calculation on the results of 10 consecutive automatic sampling analyzes in a certain day, and compare the results with the offline analysis results, as shown in Table 5. The results show that the online chromatographic analysis device operates stably, an...

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Abstract

The invention relates to an online chromatographic analysis device, which mainly solves the problem of difficult simultaneous analysis of a mixture of hydrogen / permanent gases, non-aromatic hydrocarbon and aromatic hydrocarbon in the process of analyzing an aqueous reaction system and solves the water interference problem during analysis in the conventional chromatographic analysis technology. Byadopting two serially connected quantitative tubes 5 and 7 for sampling simultaneously, a sample acquired by the quantitative tube 5 switches light components with the carbon atom number less than 5 and water to a damping column 15 and an analytical column 16, while the components with the carbon atom number greater than 5 are all switched to a damping column 17 and an analytical column 18 and are all detected by a hydrogen ionized flame detector 22 after separation. A sample acquired by the quantitative tube 7 blows back the water and components with the carbon atom number of 2 and more than2, while the hydrogen, methane and other permanent gases enter an analytical column 12 for separation and are detected by a thermal conductivity detector 21. Therefore, the online chromatographic analysis device well solves the problem of the simultaneous analysis of the mixture of hydrogen / permanent gases, non-aromatic hydrocarbon and aromatic hydrocarbon and the water interference problem during analysis, and can be used for online chromatographic analysis of the aqueous mixture of hydrogen / permanent gases, non-aromatic hydrocarbon and aromatic hydrocarbon.

Description

technical field [0001] The invention relates to an online chromatographic analysis device. Background technique [0002] Many reactions are endothermic reactions, and the heat of the reaction is provided by water vapor with a large heat capacity, so the reaction product system contains a large amount of water. The presence of water brings great challenges to the chromatographic analysis of reaction products, because capillary chromatographic columns used for the separation of hydrocarbons, especially non-aromatic mixtures, are generally very sensitive to water, and water will not only change the polarity of the chromatographic column, resulting in peaks The tail broadens and the separation effect deteriorates. At the same time, it will also lead to a series of problems such as increased column loss, loss of water resistance of the chromatographic column, peak bifurcation, worse baseline, increased detection limit, and poor repeatability of quantitative data. [0003] Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/60G01N30/30G01N30/06G01N30/88G01N30/78
Inventor 高枝荣李继文高青山宋曙光王川
Owner CHINA PETROLEUM & CHEM CORP
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