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Method for distinguishing and detecting sulfoether compounds and thiophene compounds in petroleum

A detection method and compound technology, applied in measuring devices, analyzing materials, material analysis by electromagnetic means, etc., can solve the problems of inability to detect low-condensation sulfur compounds, discrimination of sulfur compounds, etc.

Active Publication Date: 2017-09-05
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

Electrospray (ESI) ionization sources are mostly used in the analysis of polar compounds. For weakly polar thioethers and thiophenes, detection can be achieved under the conditions of methyl derivatization and metal cation additives, but this method is not suitable for highly condensed Sulfur compounds are discriminatory
The APPI ionization source method can directly detect sulfides and thiophenes, but has the disadvantage of being unable to detect low-condensation sulfur-containing compounds
Moreover, although the soft ionization method mentioned above can realize the detection of thioether and thiophene, it still cannot realize the simultaneous and direct distinction of the two.

Method used

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  • Method for distinguishing and detecting sulfoether compounds and thiophene compounds in petroleum
  • Method for distinguishing and detecting sulfoether compounds and thiophene compounds in petroleum
  • Method for distinguishing and detecting sulfoether compounds and thiophene compounds in petroleum

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Embodiment 1

[0025] This embodiment provides a method for distinguishing and detecting sulfide compounds and thiophene compounds in petroleum, as well as a detection instrument, specifically as follows:

[0026] The schematic diagram of the detection instrument provided in this embodiment is shown in figure 1 , the specific structure is: the detection instrument includes a plasma ionization device (DART ionization source), a mass spectrometry detection device (Fourier transform ion cyclotron resonance mass spectrometry) and a sampling tube assembly; the plasma ionization device and the mass spectrometry detection device are connected through the first The pipe is axially connected, and the sampling tube assembly is arranged on the first connecting pipe; the sampling tube assembly includes a petroleum sample transmission tube and an oxygen-containing mixed gas transmission tube;

[0027] In the sampling tube assembly, the oil sample transmission tube is set inside the oxygen-containing mixe...

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Abstract

The invention provides a method for distinguishing and detecting sulfoether compounds and thiophene compounds in petroleum. According to the method, a plasma ionization device serves as ionization sources of mass spectrum detection, so that mass spectrum detection analysis is performed. An ionization process in the step particularly includes the step: performing excitation and ionization on petroleum samples in the oxygen mixture atmosphere by the aid of plasmas. According to the method, online oxidization ionization of sulfur ether and non-oxidation ionization of thiophene of the petroleum samples are achieved in the molecular ionization process by the aid of a special ionization environment (plasmas and oxidation atmosphere), so that the sulfoether compounds and the thiophene compounds in the petroleum are directly detected and distinguished at a molecular level.

Description

technical field [0001] The invention belongs to the technical field of petroleum component detection, and in particular relates to a method for distinguishing and detecting sulfide compounds and thiophene compounds in petroleum. Background technique [0002] Sulfur ether and thiophene are the main types of sulfur-containing compounds in petroleum, which widely exist in petroleum and its processed products. Sulfur ether and thiophene can cause corrosion of equipment, pollute the environment, and endanger human health. Therefore, sulphide, thiophene and their derivatives are important desulfurization objects in petroleum refining and processing. However, in the hydrodesulfurization process, the activity and desulfurization efficiency of catalysts vary greatly depending on the types of thioethers and thiophenes. Analysis of thioethers and thiophenes at the molecular level is an important topic in petrochemistry, and the differential detection of the two is not only important I...

Claims

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Application Information

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IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 韩晔华张艳芬任丽敏
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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