Poly-alpha-olefin base oil and preparation method thereof

A base oil and olefin technology, applied in the field of olefin polymerization, can solve the problems of low viscosity of PAO base oil, and achieve the effects of easy product separation, reducing environmental pollution and avoiding corrosion

Active Publication Date: 2020-04-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, these A1C1 3 The PAO base oil prepared by the solid-supported catalyst has a low viscosity, and the kinematic viscosity at 100°C is generally 3-8mm 2 / s
For the need of 100 ℃ kinematic viscosity 40mm 2 PAO with a viscosity range of about / s is currently mainly solved by mixing high-viscosity and low-viscosity PAO oils, but due to the existence of low-viscosity components, the lubricating oil has higher volatility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] The preparation method of polyalpha-olefin base oil provided by the invention comprises the following steps:

[0044] S1. Under the conditions of temperature 50℃~120℃, pressure 0.1~1.0MPa, α-olefin / solvent volume ratio 1:0~1:1, use Cr-AlCl 3 / Al 2 o 3 The solid-supported catalyst catalyzes the oligomerization reaction of α-olefin mixture for 3 to 8 hours;

[0045] S2. After stopping the reaction, filter the catalyst, wash with distilled water, remove the solvent by distillation under normal pressure, remove unreacted α-olefin and part of α-olefin dimer by distillation under reduced pressure, and obtain polyα-olefin base oil through hydrogenation and hydrogenation.

[0046] Among them, the Cr-AlCl 3 / Al 2 o 3 The immobilized catalyst is prepared by a liquid-phase immobilized method, comprising the following steps:

[0047] (1) Add sodium hydroxide solution to the chromium acetate solution, adjust the pH of the solution to 7.5-8.5, react with the gamma-alumina carri...

Embodiment 1

[0050] 1. Preparation of supported catalyst:

[0051] (1) Slowly add 5 (weight)% sodium hydroxide solution in the chromium acetate solution of 2.0 liters of 2.0M (mol / liter), adjust the pH of the solution to 8.0, and immediately join 1 kilogram of gamma-alumina (Al 2 o 3 ) carrier in a stirred reactor at room temperature and under stirring conditions for 2 hours, filter the carrier and dry it in a vacuum oven at room temperature, and then roast it at 600°C for 4 hours under the protection of an inert gas to obtain Cr / γ-Al 2 o 3 catalyst;

[0052] (2) 100 grams of anhydrous aluminum trichloride is made into a solution in 3.0 liters of toluene solvent, and added to 600 grams of Cr / γ-Al 2 o 3 , kept at reflux temperature for 10 hours, removed the solvent, washed the solid catalyst with toluene, and dried in vacuo to obtain Cr-AlCl 3 / Al 2 o 3 catalyst;

[0053] The chlorine content in the supported catalyst obtained above is 11.6ω%, and the chromium content is 5.6ω%.

[...

Embodiment 2

[0059] 1. Preparation of supported catalyst:

[0060](1) Slowly add 5 (weight)% sodium hydroxide solution in the chromium acetate solution of 2.0 liters of 2.0M (mol / liter), adjust the pH of the solution to 7.5, and immediately add to 1 kilogram of gamma-alumina (Al 2 o 3 ) carrier in a stirred reactor at room temperature and under stirring conditions for 2 hours, filter the carrier and dry it in a vacuum oven at room temperature, and then roast it at 400°C for 8 hours under the protection of an inert gas to obtain Cr / γ-Al 2 o 3 catalyst;

[0061] (2) 200 grams of anhydrous aluminum trichloride is made into a solution in 3.0 liters of toluene solvent, and added to 600 grams of Cr / γ-Al 2 o 3 , kept at reflux temperature for 8 hours, removed the solvent, washed the solid catalyst with toluene, and dried in vacuo to obtain Cr-AlCl 3 / Al 2 o 3 catalyst;

[0062] The chlorine content in the obtained supported catalyst was 15.9ω%, and the chromium content was 4.7ω%.

[0063...

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Abstract

The invention relates to a preparation method of poly-alpha-olefin base oil. The method comprises the following steps: S1, catalyzing an oligomerization reaction of an alpha-olefin mixture for 3-8 hours by using a Cr-AlCl3/Al2O3 immobilized catalyst at a temperature of 50-120 DEG C under a pressure of 0.1-1.0 MPa and an alpha-olefin/solvent volume ratio of (1:0)-(1:1); and S2, after the reaction is stopped, filtering the catalyst, washing with distilled water, carrying out atmospheric distillation to remove the solvent, carrying out reduced pressure distillation to remove the unreacted alpha-olefin and part of the alpha-olefin dimer, and carrying out hydrogenation to obtain the poly-alpha-olefin base oil. The invention also relates to the poly-alpha-olefin base oil prepared by the method.The PAO base oil prepared by the method does not need to be mixed with low-viscosity PAO oil for PAO with a kinematic viscosity range of 30-40 mm<2>/s at 100 DEG C, so that the volatility of lubricating oil can be greatly reduced.

Description

technical field [0001] The invention relates to the field of olefin polymerization, in particular to a polyalpha-olefin base oil and a preparation method thereof. Background technique [0002] During most of the 20th century, the quality of lubricating oil was basically guaranteed by the compounding technology of mineral base oil prepared from crude oil through various traditional "separation processes" and various additives. Since the 1970s, with the technological progress of various engines and other mechanical equipment and the increasingly urgent "energy saving" and "environmental protection" requirements, the viscosity-temperature properties of lubricating oil (marked by viscosity index), volatility, The main properties such as thermal oxidation stability have put forward increasingly stringent requirements, so that the synthetic base oil obtained by synthesis and hydrogenation chemical conversion process has been developed. [0003] According to the API base oil class...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M105/04C07C11/02C07C2/42B01J35/10B01J27/10C10N20/02
CPCC10M105/04C07C11/02C07C2/42B01J27/10B01J35/1019C10M2203/024
Inventor 孙恩浩米普科王力搏蒋岩王婷兰刘通韩云光赵铁凯马克存王斯晗王桂芝徐显明王玉龙高晗王秀绘徐婷婷王紫东孙维霍宏亮马立莉黄付玲林如海王亚丽
Owner PETROCHINA CO LTD
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