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: 2014-02-12
CHINA PETROLEUM & CHEM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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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...

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, then add 50.00 grams of petroleum ether for dilution. Weigh 750.00 g of silica gel (200-300 mesh), add it into the chromatographic column (10 cm in diameter, 60 cm in length) with a solid addition funnel, and beat it while adding to make it compact. After the chromatographic column was thoroughly rinsed with petroleum ether, the diluted oil sample was directly sucked into the sample. Preparative liquid chromatography was separated in the order of non-polar solvent (n-hexane 1875 ml), medium polar solvent (chloroform 1500 ml) and polar solvent (isopropanol 1500 ml). The ultraviolet detector collects automatically, collects the product according to the analysis result of the ultraviolet detector, and finally divides it into three parts, namely non-polar solvent eluate, medium polar eluate and strong polar eluate. The solvents of the three eluates were evaporated under reduced pressure with a rotary evaporator t...

Embodiment 2

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

[0026] table 3

[0027] project total saturated hydrocarbon Total Aromatics Total Glue Quality Mass (grams) 98.2 0.108 0.096 The proportion(%) 99.8 0.110 0.098

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

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Abstract

The invention relates to a method for separating a base oil family composition and mainly aims at solving the technical problems of complex separation method and a large using amount of a solvent in the prior art. The method provided by the invention comprises the following steps: a) diluting base oil with the solvent which is inert to the base oil; b) separating the base oil family composition by using a liquid preparative chromatograph; c) detecting an obtained product by using an ultraviolet detector, and collecting products according to analysis results of the ultraviolet detector; and d) obtaining total quantity of saturated hydrocarbons, total quantity of aromatic hydrocarbons and total mass of rubber after the treatment of the products. By adopting the technical scheme, the problems are solved in a relatively good manner, and the method can be used in industrial production for separating the base oil family composition.

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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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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