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A method for separating and analyzing non-basic nitrogen compounds in petroleum components

A non-basic nitrogen and compound technology, which is applied in the petroleum industry and the treatment of hydrocarbon oil, etc., can solve the problems of loss of non-basic nitrogen compounds, high operating skill requirements, poor applicability of petroleum components, etc., and achieve mild operating conditions Effect

Active Publication Date: 2016-06-29
BC P INC CHINA NAT PETROLEUM CORP +1
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AI Technical Summary

Problems solved by technology

Moreover, the simple column chromatography method is highly empirical and requires high operating skills. Therefore, it is not suitable for petroleum components with different light and heavy, and it is easy to cause the loss of non-basic nitrogen compounds, causing great trouble to qualitative and quantitative detection.

Method used

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  • A method for separating and analyzing non-basic nitrogen compounds in petroleum components

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Embodiment 1

[0032] This embodiment provides a method for separating and analyzing non-basic nitrogen compounds in petroleum components, and its specific steps are as follows:

[0033] First, add 10 g of hydrotreated diesel oil with a total nitrogen content of 169 μg / g and 50 ml of dichloromethane into a 250 ml eggplant-shaped bottle, then add 0.5 g of silver tetrafluoroborate, and add 0.3 g of silver tetrafluoroborate with a syringe under vigorous stirring. mL of methyl iodide, the sealed eggplant-shaped bottle was stirred and reacted at 25° C. for 24 hours under dark conditions, then 0.2 mL of methyl iodide was added, and reacted for another 24 hours under the same conditions.

[0034] Then, the filtrate obtained after filtering the silver iodide generated by the reaction was volatilized in a nitrogen atmosphere to remove dichloromethane and excess methyl iodide, after adding 100 milliliters of n-hexane, ultrasonication was performed for 1 minute, and then the insoluble part was centrifug...

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Abstract

The invention discloses a method for separating and analyzing a non-alkaline nitrogen compound in a petroleum component. The method comprises the following steps: dissolving the petroleum component in an organic solvent, adding an alkylate reagent to react for 12-48h at the temperature of 0-80 DEG C and filtering to get the filtrate; mixing the filtrate with a C5-C7 alkane solvent to separate the sediment; dissolving the sediment in the organic solvent, and adding a dealkylation reagent to react for 12-48h at the temperature of 50-150 DEG C; performing column chromatography isolation on the obtained mixed solution, and removing the sulfocompound to obtain the methylated non-alkaline nitrogen compound; and detecting the obtained nitride by a gas chromatography-mass spectrometer. By adopting the method for separating and analyzing the non-alkaline nitrogen compound in a petroleum component, the non-alkaline nitride can be converted to N-methyl derivative and can be completely separated from the hydrocarbon and a complex matrix of the other heteroatom compounds; and the method is suitable for analyzing the molecular organization of the low-content non-alkaline nitride in the petroleum component.

Description

technical field [0001] The invention relates to a method for separating and analyzing non-basic nitrogen compounds in petroleum components, belonging to the technical field of petroleum analysis. Background technique [0002] Nitrogen is one of the most important heteroatoms in petroleum components. The molecular composition of non-basic nitrogen compounds can be used in petroleum exploration to study the migration direction of oil and gas. Adverse effects, release of harmful gases such as nitrogen oxides (NOx) during the use of fossil fuels. Therefore, the study of the composition of non-basic nitrogen compounds in petroleum is a topic of concern to the petroleum industry. However, the concentration of non-basic nitrogen compounds in petroleum is very low, and these compounds need to be separated from very complex petroleum matrices for effective analysis. . [0003] The separation and detection of non-basic nitrogen compounds is a difficult problem in petrochemical resea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G57/00
CPCC10G57/00
Inventor 史权王萌赵锁奇
Owner BC P INC CHINA NAT PETROLEUM CORP
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