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PAO20 base oil and preparation method thereof

A technology of base oil and heavy oil, applied in the direction of base material, petroleum industry, lubricating composition, etc., can solve the problems of high preparation cost, high reaction conditions, low product yield, etc., and achieve simple operation, less side reactions, Response to easily controlled effects

Active Publication Date: 2022-05-06
CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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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 provide a kind of PAO20 base oil and preparation method in order to overcome the problems of low product yield, high requirements for reaction conditions and high preparation cost in the method for preparing PAO20 base oil in the prior art

Method used

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  • PAO20 base oil and preparation method thereof

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preparation example Construction

[0019] The first aspect of the present invention provides a kind of preparation method of PAO20 base oil, comprising:

[0020] (I) Cut the Fischer-Tropsch stable heavy oil into fractions to obtain 8 -C 12 distillate streams of hydrocarbons;

[0021] (II) subjecting the distillate stream to removal of oxygenated compounds to obtain a deoxygenated distillate stream;

[0022] (III) In the presence of a catalyst and a solvent, subjecting the deoxygenated distillate stream to a polymerization reaction to obtain a product system, and post-processing the product system to obtain a primary product;

[0023] (IV) Distilling the initial product to obtain PAO20 base oil.

[0024] According to the present invention, the Fischer-Tropsch stable heavy oil is obtained from a medium-temperature Fischer-Tropsch synthesis process and contains α-olefins, alkanes and oxygenates. 8 -C 20 Heavy product. The medium temperature Fischer-Tropsch synthesis process refers to the synthesis gas (mainl...

Embodiment 1

[0065] (I) Fischer-Tropsch stabilized heavy oil is introduced into the first rectification column for fraction cutting (the reflux ratio is 20, the tower top temperature is 170°C, and the tower top pressure is normal pressure), to obtain C 10 A distillate stream of hydrocarbons (based on the total amount of said distillate stream, said distillate stream has an alpha-olefin content of 61.2% by weight);

[0066] (II) adding column chromatography silica gel to the distillate stream (column chromatography silica gel: the weight ratio of the distillate stream is 1:5), stirring for 1h for adsorption, repeating the above adsorption process twice to obtain the deoxygenated distillate stream (based on The total amount of the deoxygenated distillate stream, the content of oxygen-containing compounds in the deoxygenated distillate stream is 800ppm);

[0067] (III) AlCl 3 Powder and n-heptane are added in the reaction vessel, and nitrogen gas is passed into, and then the deoxygenated dis...

Embodiment 2

[0072] (I) Fischer-Tropsch stabilized heavy oil is introduced into the first rectification tower for fraction cutting (the reflux ratio is 20, the tower top temperature is 150°C-170°C, and the tower top pressure is normal pressure), to obtain C 9 -C 10 A distillate stream of hydrocarbons (based on the total amount of said distillate stream, said distillate stream has an alpha-olefin content of 63.5% by weight);

[0073] (II) adding column chromatography silica gel to the distillate stream (column chromatography silica gel: the weight ratio of the distillate stream is 1:5), stirring for 1h for adsorption, repeating the above adsorption process twice to obtain the deoxygenated distillate stream (based on The total amount of the deoxygenated distillate stream, the content of oxygen-containing compounds in the deoxygenated distillate stream is 800ppm);

[0074] (III) AlCl 3 Add the powder and n-heptane solvent into the reaction vessel, feed nitrogen, and then use a constant pres...

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Abstract

The invention relates to the field of lubricating oil preparation, and discloses PAO20 base oil and a preparation method thereof, and the method comprises the following steps: (1) carrying out fraction cutting on Fischer-Tropsch stabilized heavy oil to obtain a fraction material flow containing C8-C12 hydrocarbons; (2) carrying out oxygen-containing compound removal treatment on the fraction material flow to obtain a deoxidized fraction material flow; (III) in the presence of a catalyst and a solvent, carrying out polymerization reaction on the deoxidized fraction material flow to obtain a product system, and carrying out post-treatment on the product system to obtain an initial product; and (IV) carrying out distillation treatment on the initial product to obtain the PAO20 base oil. According to the method, the yield of the PAO20 base oil can be higher than 95%, and the prepared PAO20 base oil has better low-temperature fluidity and thermal stability.

Description

technical field [0001] The invention relates to the field of lubricating oil preparation, in particular to a PAO20 base oil and a preparation method. Background technique [0002] As the main synthetic base oil, polyalphaolefin (PAO) has outstanding advantages in terms of viscosity-temperature properties, low-temperature fluidity, oxidation stability, and evaporation loss. It can be used as a raw material for high-quality lubricating oils and can reduce mechanical oil change intervals ,Extended service life. In addition, PAO contains almost no sulfur, is biodegradable, and has little environmental pollution after decomposition. At present, different types of lubricating oils prepared by PAO and lubricating oil additives are widely used in many fields such as automotive internal combustion engine oil, heat transfer oil, compressor oil, aerospace, and military oil. [0003] In order to improve the quality of PAO products in China and provide high-quality PAO base oils in the...

Claims

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Application Information

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IPC IPC(8): C10M107/02C10M177/00
CPCC10M107/02C10M177/00C10M2205/0206
Inventor 白忠祥安良成张安贵何金学张慧佳范娜娜
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD