Determination method for saturated hydrocarbon, arene, colloid, asphalt content in oil product

A technology of asphaltene content and determination method, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of difficult actual production and the inability to measure the four components of mixed oil, so as to reduce hazards, improve consistency, and improve work efficiency effect

Inactive Publication Date: 2006-04-26
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot determine the four components of mixed oil species and unrelated model oil species, and cannot separate gums and asphaltenes
However, most domestic oil refineries process mixed oils, so the TLC-FID method is difficult to apply to actual production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 0.10 g of the oil sample and dilute it with 4.0 g of benzene. The thin-layer chromatograph was turned on and warmed up for half an hour, and a blank scan was performed. The oven temperature was set at 120°C. Draw 1.0ul sample with a micro-syringe, and point the sample solution on the chromatographic rod in 5 times. Move the chromatographic rod to the first developing tank (the developing agent is mixed with 125g n-heptane and 5g toluene) and expand to 100mm, take it out and put it in a drying oven to dry for 2 minutes to drive away the solvent. Then move the chromatographic stick to the second developing tank (developing agent is 170g toluene) to expand to 55mm, take it out and put it in a drying oven to dry for 2 minutes to drive away the solvent. Then move the chromatographic rod to the third developing tank (the developing agent is mixed with 250g of dichloromethane and 5g of methanol) to develop to 20mm, take it out and put it in a drying oven to dry for 2 m...

Embodiment 2

[0023] Weigh 0.15g of oil sample and dilute with 5.0g of benzene by weight. The oven temperature was set at 100°C. The first developer is mixed with 130g n-heptane plus 8g toluene, the second developer is 170g toluene, and the third developer is mixed with 250g methylene chloride and 5g ethanol. Other conditions are the same as in Example 1, and then use The same method as in Example 1 is used to measure the four components of the 2# oil sample. At the same time, the gravimetric method was used to compare and measure the 2# oil sample. The results of the two methods are shown in Table 3.

[0024]

[0025] It can be seen from Table 3 that the two methods have good consistency in the determination results of 2# oil sample, and the absolute deviation is within the allowable error range.

Embodiment 3

[0027] Weigh 0.10 g of the oil sample and dilute it with 8.0 g of benzene. The oven temperature was set at 110°C. The first developer is mixed with 130g n-heptane plus 10g toluene, the second developer is 170g toluene, and the third developer is mixed with 250g methylene chloride and 8g methanol. Other conditions are the same as in Example 1, and then use The same method as in Example 1 was used to measure the four components of the 3# oil sample. At the same time, the gravimetric method was used to compare and measure the 3# oil sample. The results of the two methods are shown in Table 4.

[0028]

sample name

project

The method of the invention

The measurement results(%)

Gravimetry

Determined result (%)

Absolutely partial

Difference(%)

3# oil sample

saturated hydrocarbon

26.08

27.12

1.04

Aromatics

64.40

63.85

0.55

colloid

8....

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PUM

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Abstract

The invention discloses a detecting method of saturated hydrocarbon, aromatic hydrocarbon, colloid and asphaltene content in one oil, which comprises the following steps: diluting the 1-2 weight sample through 45-90 weight benzeneú” preheating for half a hour through thin-layer chromatograph to do blank scan; setting the drier temperature between 100 and 120 deg.c; extracting 1.0ª–l sample through microscale injector to drip on the chromarod for 5 times; moving the chromarod at the first, second and third developing tank; connecting the host and disposer to scan the chromarod on the hydrogen flame; displaying chromatogram, chromatogram peak area and hydrocarbon, aromatic hydrocarbon, colloid, asphaltene content on the data disposer automatically, which realizes the detection of single or mixing oil.

Description

technical field [0001] The invention relates to a method for determining the content of saturated hydrocarbons, aromatic hydrocarbons, colloids and asphaltene in oil products, in particular to a method for measuring the contents of saturated hydrocarbons, aromatic hydrocarbons, colloids and asphaltene in oil products by using a thin-layer chromatograph. technical background [0002] In the prior art, the domestic TLC-FID method for determining the content of saturated hydrocarbons, aromatics, colloids, and asphaltenes in oil products is as follows: firstly, the TLC-FID method and gravimetric method are established for each single oil type. Correlation model before the determination of the four components of the single oil species. The specific measurement process: the thin-layer chromatograph is turned on and preheated for half an hour, and a blank scan is performed. The drying oven is set at an appropriate temperature. Weigh an appropriate amount of sample and dissolve it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/90
Inventor 赵诚光宁长青展江宏
Owner PETROCHINA CO LTD
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