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Low-viscosity poly-alpha-olefin lubricating oil and synthetic method thereof

A technology of olefin lubricating oil and synthesis method, which is applied in the direction of lubricating composition, hydrocarbon oil treatment, hydrocarbon oil treatment products, etc., and can solve problems such as drying methods of complexes that have not been seen

Inactive Publication Date: 2020-06-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although most of the above-mentioned patents disclose the recovery method of the complex, there is no drying method for the complex.

Method used

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  • Low-viscosity poly-alpha-olefin lubricating oil and synthetic method thereof
  • Low-viscosity poly-alpha-olefin lubricating oil and synthetic method thereof
  • Low-viscosity poly-alpha-olefin lubricating oil and synthetic method thereof

Examples

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Effect test

Embodiment 1

[0086] see figure 1 Shown, the synthesis of low-viscosity polyalpha-olefin lubricating oil of the present invention and catalyst recycling method technological process, specifically comprise the following steps:

[0087] 1. A synthetic method of low-viscosity polyalpha-olefin lubricating oil, specifically comprising the following processes:

[0088] (1) Refining of raw materials: Carry out dehydration and refining treatment of α-olefin raw materials in a fixed bed with molecular sieves, so that the water content in the raw materials is less than or equal to 10ppm;

[0089] (2) Polymerization reaction: Put the α-olefin raw material and recovered light components into the reactor, add recovered complex catalyst and supplemented fresh complex catalyst (water content ≤ 10ppm), and fill BF 3 Carrying out the reaction to obtain a reaction product;

[0090] (3) Catalyst separation and removal: the reaction product is subjected to flash evaporation, air stripping, centrifugation and...

Embodiment 1～2

[0097] Use dehydrated and refined 1-decene (water content of 4ppm) as raw material to synthesize low-viscosity PAO, use butanol (water content of 50ppm) as a cocatalyst, and the amount of butanol: 1-decene is 1:100 (the amount of substance ratio), at 30°C, BF 3 The pressure is 0.2MPa, the residence time is 1h, and the reaction product is flashed.

[0098] Table 1 Flash process on BF 3 The removal effect of

[0099]

Embodiment 3～8

[0101] The flash oil obtained from the treatment in Examples 1 and 2 was used as the feed for air stripping at atmospheric pressure, and the stripping treatment was carried out respectively.

[0102] Table 2 air stripping separation to BF 3 The removal effect of

[0103]

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Abstract

The invention provides a low-viscosity poly-alpha-olefin lubricating oil and a synthetic method thereof. The method comprises the following steps: (1) dehydration treatment: carrying out a dehydrationtreatment on an alpha-olefin raw material to enable the water content in the raw material to be less than or equal to 10ppm; (2) polymerization reaction: subjecting the dehydrated alpha-olefin raw material to a reaction in the presence of a complex catalyst and gas-phase BF3 to obtain a reaction product, wherein the pressure of the gas-phase BF3 is 0.01-1 MPa; (3) catalyst removal: sequentially carrying out flash evaporation, gas stripping, centrifugation and washing on the reaction product obtained in the step (2) to obtain an intermediate product; and (4) post-treatment: carrying out reduced pressure distillation on the intermediate product obtained in the step (3) to separate the unreacted alpha-olefin raw material and alpha-olefin dimer, carrying out a hydrogenation saturation treatment on the remaining heavy components, and carrying out fractionation cutting to obtain poly-alpha-olefin synthetic oil with different viscosity grades. The method is simple in process, easy and convenient to operate, mild in process conditions and capable of remarkably reducing the operation cost.

Description

technical field [0001] The invention belongs to the field of petrochemical industry. Specifically, the invention relates to a low-viscosity polyalpha-olefin lubricating oil and a synthesis method thereof. Background technique [0002] Regarding the synthesis of low-viscosity poly-α-olefin lubricating oil and the catalyst recovery technology, a large number of related technologies and patents have been published at home and abroad. [0003] US3763244 discloses the use of BF 3 / Water system catalyzes the method for preparing low pour point lubricating oil from conventional C6~C16α-olefins; when US5191140A uses water and acetic anhydride as co-catalysts, the product with a kinematic viscosity of 3.58cSt and a viscosity index of 125 at 100°C is obtained, and the olefin conversion rate is 76.8%; US3742082 discloses a kind of BF 3 As a catalyst, phosphoric acid or water is used as a cocatalyst to catalyze C6~C10α-olefins, especially 1-decene to synthesize olefin dimers. The mol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G50/02
CPCC10G50/02C08F2/00C08F4/14C08F110/14C10M107/10C10M2205/0285C10G2400/22C10G2400/10C10G2300/1088
Inventor 褚洪岭王斯晗马克存徐显明王力搏王桂芝蒋岩冯乐刚王玉龙孙恩浩霍宏亮刘通王亚丽王秀绘高晗曹媛媛王凤荣关伟宏林如海韩雪梅韩云光黄付玲于部伟
Owner PETROCHINA CO LTD