Qualitative and quantitative analysis method for high-pressure liquid material

A technology for high-pressure liquid and liquid components, which is applied in the field of quantitative analysis and qualitative analysis of high-pressure liquid materials, can solve the problems of long residence time, difficult detection of liquid materials, low detection efficiency, etc. The effect of high detection efficiency

Active Publication Date: 2019-09-27
北京水木滨华科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The reason why the detection of the liquid material is difficult is that the composition and content of the components contained in each liquid material to be tested in real time are extremely complex, for example, the content of some components is extremely high, which can reach more than 99%. How to achieve quantitative detection of trace components becomes a problem; some components have a particularly long residence time, and how to achieve efficient detection of different components becomes a problem; in addition, it is also necessary to match different detectors according to the composition of the components. Such as FID (Flame Ionization Detector), TCD (Thermal Conductivity Cell Detector), etc. Therefore, the method of the prior art needs to use two or three needles for detection, and the detection efficiency is very low

Method used

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  • Qualitative and quantitative analysis method for high-pressure liquid material
  • Qualitative and quantitative analysis method for high-pressure liquid material
  • Qualitative and quantitative analysis method for high-pressure liquid material

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preparation example Construction

[0176] The preparation method of the present invention will be further described in detail below in conjunction with specific examples. It should be understood that the following embodiments are only illustrative and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies implemented based on the foregoing contents of the present invention are covered by the scope of the present invention.

[0177] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples, unless otherwise specified, can be obtained from commercial sources.

Embodiment 1

[0179] 1 The sample is the high-pressure liquid material obtained after the pilot test of isobutane oxidation

[0180] 2 sample pretreatment

[0181] Weigh and sample the cylinder to the nearest 0.01g and record it as m 0 . Add about 150g of water to a three-necked flask with a shut-off valve, accurate to 0.01g, and record the weight as M 1 ; Weigh the total mass of the sampled cylinder m 1 , Accurate to 0.01g. Connect the three-necked flask with the sampling small steel bottle, and connect the sampling bag with the other interface of the three-necked flask. After connection, the entire system is evacuated. Then fill the entire system with high-purity nitrogen to replace the air in the system. After the replacement is completed, close the nitrogen filling valve. Slowly open the cylinder outlet valve to avoid splashing of bubbles emerging from the liquid surface, and release the liquid within 8-10 minutes. Replace the nitrogen in the gas bag with the overflowing gas. After the sa...

Embodiment 2

[0225] This embodiment provides a detection unit for liquid components. The detection unit includes a gas chromatograph, a sixth chromatographic column, a first detector, a second detector, an automatic flow controller, and an automatic pressure controller; the gas phase The chromatograph includes an injection port, a fourth chromatographic column, a fifth chromatographic column, and a heart-cutting part; one end of the fourth chromatographic column is connected to the injection port of the gas chromatograph, and the other end is connected to the inlet of the heart-cutting part, The first outlet end of the heart-cutting component is connected to the first detector through the sixth chromatographic column; the second outlet end is connected to the fifth chromatographic column, and the outlet end of the fifth chromatographic column is connected to the second detector;

[0226] The first detector and the second detector are thermal conductivity cell detectors or hydrogen flame ioniza...

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Abstract

The invention provides a qualitative and quantitative analysis method for a high-pressure liquid material. The qualitative and quantitative analysis method for the high-pressure liquid material comprises the steps of: a pretreatment process, wherein the pretreatment process can completely separate gas-phase components mixed in the high-pressure liquid material and can obtain pretreated liquid-phase components, and the pretreatment process does not have any influence on the content of each component in the liquid-phase components. The separated gas-phase components and the pretreated liquid-phase components are respectively detected, and accurate analysis results can be obtained by adopting different detection methods according to different components contained in the liquid-phase components and the gas-phase components, so that the workload of a detection device is reduced, the detection cost is saved, and the detection accuracy is improved. The detection of the liquid components can achieve the qualitative and quantitative analysis of the components with larger content difference or larger property difference in the liquid components by one-time sample injection, has high detection efficiency and high detection accuracy, and is very beneficial to popularization and application.

Description

Technical field [0001] The invention belongs to the technical field of high-pressure liquid material detection, and specifically relates to a qualitative and quantitative analysis method of high-pressure liquid material. Background technique [0002] For the high-pressure reaction liquid, in order to separate the liquid and the volatile components temporarily dissolved in the liquid, flash evaporation and high-pressure liquid injection are conventionally used to remove the gas component in the liquid component; however, flash evaporation When processing high-pressure liquids, it is necessary to ensure that the composition of the liquid can be vaporized, and to ensure that the composition after vaporization, especially the content of trace impurities, is exactly the same as the composition in the liquid state, so the flash vaporization method is suitable for hydrocarbon compounds with smaller heat capacity . However, for a system containing a large amount of oxygen-containing com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 王桂华姚春海马敏郑虓
Owner 北京水木滨华科技有限公司
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