Preparation method of medium-viscosity poly alpha-olefin base oil

Abstract

The invention relates to a preparation method of medium-viscosity poly alpha-olefin base oil. The preparation method comprises the following steps: under conditions with a temperature of 20 DEG C-120 DEG C, reaction pressure of 0.1 MPa-1.4 MPa and a volume ratio of alpha-olefin / a solvent of (1:0)-(1:3), catalyzing 1-decene or 1-decene and alpha-olefin of C8-C12 for oligomerization for 2 hours-12 hours by using an alkaline-modified AlCl3 / Al2O3 immobilized catalyst; and filtering the catalyst after stopping reaction, washing by distilled water, distilling under the normal pressure to remove the solvent, distilling under reduced pressure to remove un-reacted alpha-olefin to obtain alpha-olefin oligomer base oil, wherein the yield of the poly alpha-olefin is greater than 60 omega%, the movement viscosity of the oligomer at 100 DEG C is 10.0mm<2> / s-25.0mm<2> / s, and the chlorine content of the oligomer is less than 2.0 omega%.

Description

technical field

[0001] The invention relates to a preparation method of medium-viscosity polyalpha-olefin base oil. Background technique

[0002] As technology advances and the automotive industry grows, the demand for high-quality finished lubricants continues to increase. Mineral base oils often have shortcomings such as too wide molecular weight distribution due to the limitation of process conditions. Compared with natural mineral base oils, PAO (polyalpha-olefin) base oils have better lubricating properties and chemical stability. It is highly valued in the application of machinery industry.

[0003] According to the API base oil classification, PAO (poly-α-olefin) belongs to Group IV base oil. In foreign countries, most PAOs are obtained by oligomerization of 1-decene, so 1-decene oligomer is the most common base oil in lubricating oil base oils, with high viscosity index, high flash point, Low pour point, good low temperature fluidity, small evaporation loss, good ...

Examples

Embodiment 1

[0022] Carrier modification treatment: at room temperature, spherical γ-alumina carrier (carrier diameter 1.3-2.3mm, specific surface area 100-180m 2 / g, total pore volume ≥1.0ml / g;) soak in 1.0M sodium carbonate solution for 6 hours, then vacuum dry at 80-100°C for 8 hours, and then bake at 600°C for 6 hours at high temperature.

[0023] Solid loading of aluminum trichloride solution: under the protection of argon, make a solution of 5g of anhydrous aluminum trichloride in 100ml of carbon tetrachloride, add it to 10g of the above-mentioned modified and activated alumina carrier, and The temperature was maintained for 36 hours, the solvent was removed, washed with n-hexane, and vacuum-dried to obtain an aluminum trichloride supported catalyst.

[0024] The chlorine content of the above-mentioned aluminum trichloride supported catalyst was determined by Volhard titration, and the chlorine content in the supported catalyst was obtained as 18.25ω%.

[0025] Catalytic 1-decene ol...

Embodiment 2

[0027] The preparation of the loaded aluminum trichloride catalyst is the same as in Example 1, except that the carrier treatment condition is that at room temperature, the spherical gamma-alumina carrier is immersed in 0.5M sodium carbonate solution for 6 hours, and then vacuum-dried at 80-100°C for 8 hours, followed by high-temperature calcination at 600°C for 6 hours.

[0028] The chlorine content of the above-mentioned aluminum trichloride supported catalyst was determined by Volhard titration, and the chlorine content in the supported catalyst was obtained to be 16.66ω%.

[0029] Catalytic 1-decene oligomerization: Add 80ml of n-hexane, 8g of the above-mentioned carrier catalyst, and 40ml of 1-decene into a 250ml high-pressure polymerization kettle, and carry out 1-decene oligomerization reaction at a reaction temperature of 80°C and a reaction pressure of 1.0MPa 5 hours. The reaction was stopped, the catalyst was filtered, the solvent n-hexane was distilled off under no...

Embodiment 3

[0031] The preparation of the supported aluminum trichloride catalyst is the same as in Example 1, except that the carrier treatment condition is that the spherical γ-alumina carrier is immersed in 1.0M sodium bicarbonate solution for 6 hours at room temperature, and then vacuum-dried at 80-100°C 8 hours, and then high-temperature calcination at 600°C for 6 hours.

[0032] The chlorine content of the above-mentioned aluminum trichloride supported catalyst was measured by Volhard titration, and the chlorine content in the supported catalyst was obtained as 15.20ω%.

[0033] Catalytic 1-decene oligomerization: Add 80ml of n-hexane, 8g of the above-mentioned carrier catalyst, and 80ml of 1-decene into a 250ml high-pressure polymerization kettle, and carry out 1-decene oligomerization reaction at a reaction temperature of 80°C and a reaction pressure of 1.0MPa 5 hours. The reaction was stopped, the catalyst was filtered, the solvent n-hexane was distilled off under normal pressur...

technical field

[0001] The invention relates to a preparation method of medium-viscosity polyalpha-olefin base oil. Background technique

[0002] As technology advances and the automotive industry grows, the demand for high-quality finished lubricants continues to increase. Mineral base oils often have shortcomings such as too wide molecular weight distribution due to the limitation of process conditions. Compared with natural mineral base oils, PAO (polyalpha-olefin) base oils have better lubricating properties and chemical stability. It is highly valued in the application of machinery industry.

[0003] According to the API base oil classification, PAO (poly-α-olefin) belongs to Group IV base oil. In foreign countries, most PAOs are obtained by oligomerization of 1-decene, so 1-decene oligomer is the most common base oil in lubricating oil base oils, with high viscosity index, high flash point, Low pour point, good low temperature fluidity, small evaporation loss, good ...

Examples

Embodiment 1

[0022] Carrier modification treatment: at room temperature, spherical γ-alumina carrier (carrier diameter 1.3-2.3mm, specific surface area 100-180m 2 / g, total pore volume ≥1.0ml / g;) soak in 1.0M sodium carbonate solution for 6 hours, then vacuum dry at 80-100°C for 8 hours, and then bake at 600°C for 6 hours at high temperature.

[0023] Solid loading of aluminum trichloride solution: under the protection of argon, make a solution of 5g of anhydrous aluminum trichloride in 100ml of carbon tetrachloride, add it to 10g of the above-mentioned modified and activated alumina carrier, and The temperature was maintained for 36 hours, the solvent was removed, washed with n-hexane, and vacuum-dried to obtain an aluminum trichloride supported catalyst.

[0024] The chlorine content of the above-mentioned aluminum trichloride supported catalyst was determined by Volhard titration, and the chlorine content in the supported catalyst was obtained as 18.25ω%.

[0025] Catalytic 1-decene ol...

Embodiment 2

[0027] The preparation of the loaded aluminum trichloride catalyst is the same as in Example 1, except that the carrier treatment condition is that at room temperature, the spherical gamma-alumina carrier is immersed in 0.5M sodium carbonate solution for 6 hours, and then vacuum-dried at 80-100°C for 8 hours, followed by high-temperature calcination at 600°C for 6 hours.

[0028] The chlorine content of the above-mentioned aluminum trichloride supported catalyst was determined by Volhard titration, and the chlorine content in the supported catalyst was obtained to be 16.66ω%.

[0029] Catalytic 1-decene oligomerization: Add 80ml of n-hexane, 8g of the above-mentioned carrier catalyst, and 40ml of 1-decene into a 250ml high-pressure polymerization kettle, and carry out 1-decene oligomerization reaction at a reaction temperature of 80°C and a reaction pressure of 1.0MPa 5 hours. The reaction was stopped, the catalyst was filtered, the solvent n-hexane was distilled off under no...

Embodiment 3

[0031] The preparation of the supported aluminum trichloride catalyst is the same as in Example 1, except that the carrier treatment condition is that the spherical γ-alumina carrier is immersed in 1.0M sodium bicarbonate solution for 6 hours at room temperature, and then vacuum-dried at 80-100°C 8 hours, and then high-temperature calcination at 600°C for 6 hours.

[0032] The chlorine content of the above-mentioned aluminum trichloride supported catalyst was measured by Volhard titration, and the chlorine content in the supported catalyst was obtained as 15.20ω%.

[0033] Catalytic 1-decene oligomerization: Add 80ml of n-hexane, 8g of the above-mentioned carrier catalyst, and 80ml of 1-decene into a 250ml high-pressure polymerization kettle, and carry out 1-decene oligomerization reaction at a reaction temperature of 80°C and a reaction pressure of 1.0MPa 5 hours. The reaction was stopped, the catalyst was filtered, the solvent n-hexane was distilled off under normal pressur...