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Production method of lubricant base oil and naphthenic oil

A technology for lubricating base oils and production methods, which is applied in the production field of lubricating base oils and naphthenic oils, can solve problems such as high naphthenic content and low viscosity index of base oils, achieve high yields, and improve separation efficiency Effect

Active Publication Date: 2019-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of higher naphthene content and low viscosity index of base oil in the products existing in the production of lubricating oil base oil in the prior art, and provide a kind of production method of lubricating oil base oil and naphthenic oil, which can Simultaneous production of high viscosity index base oils and low pour point oils rich in naphthenes

Method used

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  • Production method of lubricant base oil and naphthenic oil
  • Production method of lubricant base oil and naphthenic oil

Examples

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Effect test

Embodiment 1

[0035] This example is used to illustrate the production method of lubricating oil base oil and naphthenic oil provided by the present invention.

[0036] The No. 4 base oil produced by the lubricating oil isomerization dewaxing unit of Sinopec Gaoqiao Branch has a carbon number of 15-25 and a pour point of -12°C as the raw material oil. The properties of the raw material oil are shown in Table 1. A mixture of benzene and butanone is used as a solvent, the content of benzene is 3% by weight, and the content of butanone is 97% by weight. The mass ratio of solvent to raw oil is 10:1. Solid-liquid separation and filtration temperature -30°C. The ratio of the refractive index of the solvent at the filtration temperature to the refractive index of the mixture of liquid components and solvent in the feedstock oil at the filtration temperature is 0.98. See Table 2 for the basic properties of the first component and the second component separated by this method, as well as the separ...

Embodiment 2

[0040] This example is used to illustrate the production method of lubricating oil base oil and naphthenic oil provided by the present invention.

[0041] The No. 10 base oil with a carbon number between 25-35 and a pour point of -12°C produced by Sinopec Jingmen Branch's fourth-line distillate oil through solvent extraction-hydrotreating-solvent dewaxing process is used as raw material. See Table 1 for oil properties. A mixture of cyclopentane and ethanol is used as a solvent, the content of cyclopentane in the solvent is 13% by weight, and the content of ethanol is 87% by weight. The mass ratio of solvent to raw oil is 15:1. Solid-liquid separation filtration temperature -40 ℃. The ratio of the refractive index of the solvent at the filtration temperature to the refractive index of the mixture of feedstock oil and solvent at the filtration temperature was 0.98. See Table 2 for the basic properties of the first component and the second component separated by this method, a...

Embodiment 3

[0043] This example is used to illustrate the production method of lubricating oil base oil and naphthenic oil provided by the present invention.

[0044] Using the >380°C distillate of hydrocracking tail oil produced by the hydrocracking unit of Sinopec Beijing Yanshan Branch as the raw material, the product with a carbon number of 20-40 and a pour point of -12°C after conventional solvent dewaxing is used as the raw material , the properties of raw oil are shown in Table 1. A mixture of n-octane and propanol is used as a solvent, the content of n-octane in the solvent is 10% by weight, and the content of propanol is 90%. The mass ratio of solvent to raw oil is 5:1. Solid-liquid separation and filtration temperature is -45°C. The ratio of the refractive index of the solvent at the filtration temperature to the refractive index of the mixture of feedstock oil and solvent at the filtration temperature was 0.97. See Table 2 for the basic properties of the first component and ...

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Abstract

The invention relates to the field of petrochemical engineering and discloses a production method of lubricant base oil and naphthenic oil. The production method is characterized by including: performing cooling filtration on a mixture of raw material oil and a solvent to obtain a solvent-containing solid hydrocarbon and a liquid hydrocarbon solution, wherein the raw material oil is a mixture containing isoalkanes and cycloalkanes, and removing the solvent to respectively obtain a low-temperature solid phase being rich in the isoalkanes and a low-temperature liquid phase being rich in the cycloalkanes; at the filtration temperature, the ratio of the refractive index of the solvent to the refractive index of the mixture of the liquid components, in the raw material oil, and the solvent is 0.95-1, preferably 0.97-0.99. The method can greatly increase the separation efficiency of the isoalkanes and cycloalkanes, can acquire the cycloalkanes at high yield and the isoalkanes with high viscosity index.

Description

technical field [0001] The invention relates to a production method of lubricating oil base oil and naphthenic oil. Background technique [0002] Base oil produced from petroleum distillates with a boiling point greater than 300°C is the main component of blended lubricating oil products. Generally, the content of base oil in lubricating oil products is between 75-98% by weight. Therefore, base oil is the key performance that affects lubricating oil. , such as the most important factors such as viscosity-temperature performance, oxidation stability, etc. With the improvement of oil-saving performance and environmental protection performance of lubricating oil, the base oil of blended lubricating oil is required to have better viscosity-temperature performance and anti-oxidation stability. Viscosity Index (Viscosity Index, VI) is a commonly used index in the world to characterize the change of oil viscosity with temperature. the better. Oxidation stability is an index indi...

Claims

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Application Information

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IPC IPC(8): C10G31/09
Inventor 管翠诗蔡晨丁洛王玉章
Owner CHINA PETROLEUM & CHEM CORP