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Method for separating base oil family composition

A separation method and base oil technology, applied in material separation, base material, petroleum industry, etc., can solve the problems of large solvent consumption and complicated separation methods

Active Publication Date: 2015-06-10
CHINA PETROLEUM & CHEM CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem of complex separation methods and large solvent consumption in the prior art, and a new separation method of base oil group composition is provided

Method used

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  • Method for separating base oil family composition
  • Method for separating base oil family composition
  • Method for separating base oil family composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Accurately weigh 100.00 grams of lubricating oil base oil I, and then add 50.00 grams of petroleum ether to dilute for use. Weigh 750.00 grams of silica gel (200~300 mesh), add it to a chromatographic column (10 cm in diameter, 60 cm in length) with a solid addition funnel, and beat while adding it to make it compact. After the chromatographic column was thoroughly rinsed with petroleum ether, the diluted oil sample was directly sucked into the sample. Separation by liquid preparative chromatography was carried out in the order of non-polar solvent (n-hexane 1875 ml), medium polar solvent (chloroform 1500 ml) and polar solvent (isopropanol 1500 ml). The UV detector is automatically collected, and the products are collected according to the analysis results of the UV detector, and finally divided into three parts, namely the non-polar solvent eluate, the medium polar eluate and the strong polar eluate. The three eluates were evaporated under reduced pressure with a rota...

Embodiment 2

[0025] In the same way as in [Example 1], the group composition of lubricating base oil II was separated by liquid preparative chromatography. Only the non-polar solvent used is n-heptane, and the amount is 2000 ml; the medium polar solvent is chloroform, and the amount is 1500 ml; the polar solvent is n-propanol, and the amount is 1500 ml. The total saturated hydrocarbon content, total aromatic hydrocarbon content and total gum mass shown in Table 3 were obtained.

[0026] table 3

[0027] project Total Saturated Hydrocarbons Total Aromatics total glue quality Mass (g) 98.2 0.108 0.096 The proportion(%) 99.8 0.110 0.098

[0028] It can be seen from Table 3 that the total recovery rate is as high as 98.4% 。 In the same way, [Example 2] was repeated three times in parallel, and the average relative standard deviation was calculated to be 2.75%. Comparing the results with the full mass spectrometry results (which can only be accurate to 0.1...

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Abstract

The invention relates to a method for separating the composition of base oil family, and mainly solves the technical problem that the separation method in the prior art is complicated and the amount of solvent used is large. The present invention includes the following steps by adopting: a) diluting the base oil with an inert solvent; b) using a liquid phase preparative chromatograph to separate the composition of the base oil group; c) using an ultraviolet detector to detect the obtained product Detection, collect products according to the analysis results of the ultraviolet detector; d) After the product is processed, the technical scheme of obtaining the total saturated hydrocarbon content, the total aromatic hydrocarbon content and the total rubber quality solves this problem well, and can be used for the separation of base oil group composition in industrial production.

Description

technical field [0001] The invention relates to a separation method of base oil group composition. Background technique [0002] Lubricating oil is the most important and widely used lubricating material. It is a high-tech, high-value-added product formulated by blending a large amount of base oil and a small amount of additives. It plays a key role in ensuring and maintaining the normal operation of various vehicles and mechanical equipment, reducing friction loss, reducing energy consumption, and prolonging the service life of equipment. In general, more than 80% of lubricating oil is base oil, so to improve the quality of lubricating oil, improving the quality of base oil is the foundation. Mineral oil currently accounts for about 90% of the base oil, and synthetic oil and vegetable oil only account for about 10%. Due to the great difference in the grade of crude oil in different oilfields, the different processes of different mineral oil refining manufacturers, and eve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88C10M101/02
Inventor 益梅蓉孔吉霞晏金灿白雪峰何晓瑛周霞
Owner CHINA PETROLEUM & CHEM CORP
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