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A kind of separation method of alkylphenol in crude oil

A technology of an alkyl phenol and a separation method, applied in the field of petroleum geological exploration, can solve problems such as analysis troubles, and achieve the effects of being beneficial to elution and enrichment, saving reagents, and having good recovery and repeatability.

Active Publication Date: 2019-12-10
PETROCHINA CO LTD
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  • Claims
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Problems solved by technology

The amino solid phase extraction method does not have a step of precipitating asphaltenes, and the solid phase extraction column is washed with ethanol in reverse phase to collect alkylphenol compounds. Interfering substances such as asphaltenes and organic acids are likely to exist in the separated products, which will give subsequent analysis troubles

Method used

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  • A kind of separation method of alkylphenol in crude oil
  • A kind of separation method of alkylphenol in crude oil
  • A kind of separation method of alkylphenol in crude oil

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Embodiment 1

[0044] This embodiment provides a method for separating alkylphenols in crude oil, and the specific process is as follows figure 1 shown, including the following steps:

[0045] Weigh about 50mg of crude oil sample into a 2mL gas chromatography vial;

[0046] Dissolve the oil sample with 100uL dichloromethane and transfer it to the Florisil solid-phase extraction column, then rinse the remaining oil sample in the vial with 100uL dichloromethane and transfer it to the upper end of the Florisil solid-phase extraction column, pay attention When transferring the oil sample, add a small amount of drops several times; leave it for 30 minutes until the dichloromethane evaporates; first rinse the sample on the adsorbent with 0.5mL n-pentane, then rinse it with 4.5mL n-pentane, and collect the eluate ;

[0047] Concentrate the eluent to 0.5 mL under nitrogen blowing at room temperature, transfer the concentrated solution to an N-propylethylenediamine solid-phase extraction column, and ...

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Abstract

The invention provides a method for separating alkylphenol from crude oil. The method comprises the following steps: dissolving crude oil in a solvent and transferring the dissolved crude oil to a Florisil solid-phase extraction column; placing the column, leaching a sample onto an adsorbent in virtue of n-pentane and collecting eluate; subjecting the eluate to nitrogen-blowing concentration so as to obtain a concentrate; transferring the concentrate to an N-propyl ethylenediamine solid-phase extraction column, carrying out standing and then carrying out elution with n-pentane; discharging n-pentane in the N-propyl ethylenediamine solid-phase extraction column, flushing the lower end of the solid-phase extraction column with methanol, leaching the N-propyl ethylenediamine solid-phase extraction column with methanol and collecting methanol leacheate; and subjecting the methanol leacheate to nitrogen-blowing concentration at 50 DEG C to complete separation of alkylphenol from crude oil.The method for separating alkylphenol from crude oil in the invention is simple in operation, high in recovery and good in repeatability.

Description

technical field [0001] The invention relates to a separation method, in particular to a separation method of alkylphenol in crude oil, and belongs to the field of petroleum geological exploration. Background technique [0002] Alkylphenol compounds in crude oil include phenol and its derivatives whose benzene ring is substituted by alkyl, mainly including phenol, methylphenol, dimethylphenol, ethylphenol, trimethylphenol, propylphenol and isopropylphenol base phenol etc. These low-molecular-weight alkylphenols are a common oxygen-containing compound in petroleum, but their source and controlling factors are not yet clear. isomerization. [0003] Alkylphenol is a kind of trace or trace component with high polarity in crude oil. The change of its distribution, composition and concentration is an important content in the study of crude oil migration, accumulation and accumulation history in the field of geochemistry. According to the structure and physicochemical characteris...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D15/36B01D15/38B01D15/42G01N30/02G01N30/06
CPCB01D15/363B01D15/3828B01D15/424G01N30/02G01N30/06G01N2030/009
Inventor 黄凌房忱琛胡国艺张水昌翟佳
Owner PETROCHINA CO LTD
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