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Method for preparing lubricating oil base oil with high viscosity index

A lubricating base oil, high viscosity technology, applied in the directions of lubricating compositions, chemical instruments and methods, base materials, etc., can solve the problems of difficult to accurately control the reaction, low catalyst activity, high product cost, and achieve less blocking of the reactor, The effect of high catalytic efficiency and low equipment cost

Inactive Publication Date: 2018-12-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the reaction, the catalyst and the product still cannot be separated, and the catalyst is expensive, so the cost of obtaining the product is very high
[0007] Chinese patent CN102471396 has reported the use of aluminoxane, organoboride and metallocene catalysts for catalyzing C 8 -C 12 A method for preparing PAO by oligomerization of olefins, which can solve the problems of single conversion to intrinsic viscosity, low catalyst activity and poor product selectivity in the previous technology, and can control the viscosity of polyα-olefins, but there are still relatively harsh reaction conditions The problem
[0008] Chinese patent CN102776024 provides a poly-alpha-olefin synthetic oil (PAO) and its preparation method. The preparation includes the following steps: contacting the alpha-olefin with an ionic liquid at -10 to 100°C to generate a polymerized reactant; separating the polymerized reactant from the Ionic liquid; the polymerization reaction product is distilled and hydrofined to obtain polyalphaolefin synthetic oil, KV100℃ at 45mm 2 / s or more, but ionic liquids are sensitive to moisture and air, which makes it difficult to accurately control the reaction and realize industrialization.
[0009] Chinese patent CN101501083A has invented a method for preparing a liquid polyalphaolefin (PAO) with a kinematic viscosity exceeding 20 cSt at 100° C. under the presence of a metallocene catalyst, a non-coordinating anion activator and hydrogen, but the method needs to be distilled to remove the solvent. Reaction components and light products, requiring more equipment and greater energy consumption in industry
[0010] Chinese patent CN1549852A reports the synthesis and application of polyalphaolefins: one or more olefin oligomers are prepared under the condition of single-site catalyst, and the PAO has improved biodegradability, improved oxidation resistance and relatively more High viscosity index, but the reaction steps are complicated, need to separate the product and distill the solvent, the industrialization prospect is not great

Method used

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  • Method for preparing lubricating oil base oil with high viscosity index
  • Method for preparing lubricating oil base oil with high viscosity index
  • Method for preparing lubricating oil base oil with high viscosity index

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Experimental program
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specific Embodiment approach 1

[0042] Specific embodiment one: the preparation method of polydecene-1 liquid of the present embodiment realizes according to the following steps:

[0043] Under the protection of nitrogen, add metallocene catalyst, co-catalyst solution, hydrogen and monomer 1-decene liquid to the tank reactor in sequence, carry out oligomerization reaction at a temperature of 0-90°C for 0.5-4h, and add Boron trifluoride-isopropanol complex (47% boron trifluoride, 53% diethyl ether) 1ml, continued reaction of unreacted 1-decene monomer, to obtain poly-1-decene liquid.

[0044] The structural formula of the metallocene catalyst described therein is as follows:

[0045]

[0046] (I) R in the structural formula 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 -H, -CH 3 、-C 2 h 5 、-C 3 h 7 、-C 4 h 9 、-C 5 h 11 、-C 6 h 13 or -C 8 h 17 .

[0047] The cocatalyst is a composite catalyst MAO-Q, wherein MAO is methylaluminoxane, and Q is triethylaluminum, triisobutylaluminum, tri-n-h...

specific Embodiment approach 2

[0051] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the metallocene catalyst is bis(1-butyl-3-methylcyclopentadienyl) zirconium dichloride, bis(1-butyl Base-2-methyl-cyclopentadienyl)zirconium dichloride, bis(1-isobutyl-3-methylcyclopentadienyl)zirconium dichloride, bis(1-octyl-3- Butylcyclopentadienyl) zirconium dichloride, bis(n-butylcyclopentadienyl) zirconium dichloride, bis(methylcyclopentadienyl) zirconium dichloride, bis(tert-butylcyclopentadienyl) dichloride Zirconium chloride, bis(isobutylcyclopentadienyl)zirconium dichloride or bis(n-octylcyclopentadienyl)zirconium dichloride. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0052] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the co-catalyst is a composite catalyst MAO-Q. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for preparing lubricating oil base oil with a high viscosity index. The invention relates to a method for synthesizing poly alpha-olefin lubricating oil base oil fromalpha-olefin as a raw material by using a metallocene catalyst through a blending polymerization process. The method comprises the following steps: with C10 olefin as a raw material, adding the metallocene catalyst and a cocatalyst in a reactor, carrying out heating for carrying out a reaction, controlling the reaction temperature and time, adding a boron trifluoride-isopropanol complex after thereaction is finished, and continuing carrying out a reaction on the unreacted 1-decene monomer to obtain the poly alpha-olefin lubricating oil base oil. The method can be used to prepare the lubricating oil base oil with high viscosity and ultrahigh viscosity index, wherein the viscosity is 125 at a temperature of 100 DEG C, the viscosity index is 238, the viscosity-temperature property is excellent, and the low-temperature fluidity is high.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and relates to a method for preparing a metallocene catalyst, which is used to catalyze 1-decene oligomerization to synthesize high-viscosity, super-high viscosity index polyalpha-olefin base oil. Background technique [0002] Poly alpha olefin synthetic oil (poly alpha olefin, PAO) is currently the best comprehensive performance, the most widely used synthetic lubricating oil base oil (group IV lubricating oil base oil), its molecular stability, high viscosity index, low volatility , low fluidity, good viscosity-temperature performance and excellent high-temperature oxidation resistance; and the ultra-high viscosity index PAO base oil synthesized by metallocene catalyst has good high-temperature performance, high viscosity, good shear performance, no Corrosion, less coking and good wettability to the skin, etc., can be used as internal combustion engine oil, gear oil, hydraulic oil, refrige...

Claims

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Application Information

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IPC IPC(8): C07C2/22C07C11/02C10M107/10C10N20/02
CPCC07C2/22C07C2531/22C10M107/10C10M2205/0285C10N2020/02C07C11/02
Inventor 闫义彬王瑾王斯晗褚洪岭王力搏徐显明孙恩浩王桂芝王玉龙曹媛媛于部伟徐婷婷贺德福王紫东霍宏亮马立莉孙维高晗王秀绘王亚丽马克存韩云光黄付玲林如海韩雪梅
Owner PETROCHINA CO LTD
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