Separation and characterization methods for heavy oil aromatic hydrocarbon components, two-dimensional liquid chromatography, and device
A technology of two-dimensional liquid chromatography and separation method, which is applied in the field of separation and characterization of heavy oil aromatic components, two-dimensional liquid chromatography and equipment, and can solve problems such as complex operation, cumbersome steps, and large amount of calculation
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Embodiment 1
[0116] This example is used to illustrate the effect of using two-dimensional liquid chromatography to separate the aromatic components of medium-weight vacuum gas oil in Saudi Arabia.
[0117] First, solid-phase extraction was used to separate the heavy oil aromatic components in Saudi medium vacuum gas oil. Take 0.1g of Saudi Arabian medium-weight vacuum wax oil (see Table 3 for properties), dissolve it in 2mL of n-hexane, and then pour it into a solid-phase extraction column with silica gel and alumina packing as the stationary phase in a mixing volume ratio of 7:3 Above, wash the solid-phase extraction column with n-hexane, dichloromethane and dichloromethane-ethanol solution with a mixing volume ratio of 1:1 in sequence. The solvent in the desorption liquid is evaporated to dryness to obtain separated saturated hydrocarbon components, heavy oil aromatic components and colloidal components in sequence. The distillation range of the heavy oil aromatic components is 350-540°...
Embodiment 2
[0124] The characterization method of the high-resolution mass spectrum of the present invention is described.
[0125] (1) High-resolution mass spectrometry characterization conditions for aromatic components
[0126] Take 10 mg of the light component aromatics separated in Example 1 and dissolve them in 1 mL of chromatographically pure toluene to prepare a mother liquor. Dilute to 0.2 mg / mL with chromatographically pure toluene to obtain a sample solution to be tested, and use 15T SolariX FT-ICR MS from Bruker Dalton Company to test, and the test conditions are the same as in Example 1.
[0127] (2) List A of mass spectrometry data obtained from high-resolution mass spectrometry characterization of light aromatics
[0128] According to the light component aromatics high-resolution mass spectrogram (see Figure 4 ) had a total of 7488 mass spectral peaks with a signal-to-noise ratio (S / N) higher than 5.5. The data processing software that comes with the instrument can give...
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