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Pretreatment method of high-pressure liquid component

A high-pressure liquid and pretreatment technology, which is applied in the direction of material separation, material analysis, measuring devices, etc., can solve the problems that it is difficult to control the pressure of the sample to be tested, the heat capacity is large, and the quantitative analysis of liquid components cannot be reacted.

Active Publication Date: 2019-08-20
北京水木滨华科技有限公司
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Problems solved by technology

However, it is not suitable for systems containing a large amount of high-boiling oxygen-containing compounds in the reaction system due to the large heat capacity of the system; in addition, for such systems, during the sample injection process, due to the high-boiling Compounds are easy to condense and light components are selectively evaporated. The composition of the chromatographic system and the actual system composition are very different. The composition of the sample changes, and the quantitative analysis of the reaction liquid components cannot be accurately performed.
[0003] In addition, the composition of the reaction system is greatly affected by the pressure, and the composition and content are different under different pressures; if the high-pressure liquid is directly used for sampling, it is difficult to control the pressure of the samples to be tested to be consistent, resulting in poor parallelism of the test results

Method used

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  • Pretreatment method of high-pressure liquid component
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  • Pretreatment method of high-pressure liquid component

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preparation example Construction

[0050] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0051] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.

Embodiment 1

[0053] 1 The sample is the high-pressure liquid component obtained after the pilot test of isobutane oxidation

[0054] 2 Pretreatment of samples

[0055] Weigh the sampling cylinder, accurate to 0.01g, recorded 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 cylinders that have been sampled m 1 , accurate to 0.01g. Connect the three-necked flask to the sampling small steel cylinder, and connect the sampling bag to the other port of the three-necked flask. After the connection is completed, the whole system is evacuated. Then fill the whole 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 outlet valve of the steel cylinder to avoid splashing of bubbles emerging from the liquid surface, and release the liquid within 8-10 minutes. Replace the nitrogen in the air ...

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Abstract

The invention provides a pretreatment method of a high-pressure liquid component. According to the pretreatment method, a high-pressure liquid component comprising a liquid-phase component and a gas-phase component is dissolved in a dissolving liquid, so that a solution can be formed; since the dissolving liquid can absorb the liquid-phase component, the separation of the gas-phase component fromthe liquid-phase component in the high-pressure liquid component can be realized. With the pretreatment method of the invention adopted, the volatile gas-phase component can be quantitatively and accurately separated out, so that the gas-phase component and the liquid-phase component can be detected separately. Compared with previous analysis sample feeding methods, the method of the invention canseparate a gas phase and a liquid phase in a sample and then detect the gas phase and the liquid phase separately, so as to obtain an accurate analysis result.

Description

technical field [0001] The invention belongs to the technical field of liquid component detection, and in particular relates to a pretreatment method for high-pressure liquid components. Background technique [0002] For high-pressure reaction liquids, in order to separate the liquid and the components that are easily volatile into gases temporarily dissolved in the liquid, flash evaporation and high-pressure liquid sampling methods are conventionally used to remove the gas components in the liquid components; however, flash evaporation When dealing with high-pressure liquids, the method must ensure that the liquid composition can be vaporized, and the vaporized composition, especially the trace impurity content in it, is exactly the same as that in the liquid state, so the flash method is suitable for hydrocarbon compounds with small heat capacity . However, it is not suitable for systems containing a large amount of high-boiling oxygen-containing compounds in the reaction...

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 姚春海王桂华马敏解淑民郑虓
Owner 北京水木滨华科技有限公司
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