Low viscosity poly-alpha-olefin lubricant base oil, preparation method and system thereof

An olefin lubricating oil and low-viscosity technology, applied in the field of preparation of lubricating base oil, can solve the problems such as the inability to recover the catalyst, the consumption and the increase of labor cost, etc.

Active Publication Date: 2019-04-09
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Catalyst for Low Viscosity Polyα-Olefin Lubricating Oil with BF 3 Mainly, in the traditional production process, after the reaction is completed, it is necessary to perform processes such as dumping, replacement, alkali washing, and water washing to completely remove F ions (below 1ppm). In the process, a large amount of wastewater containing F ions will be generated and a large amount of waste water will be consumed. BF 3 catalyst
In this way, it is necessary to build a new supporting F ion-containing wastewater treatment plant, which increases the pressure on environmental protection; and the catalyst cannot be recovered after alkali washing and water washing, which increases the operating cost; if the alkali washing and water washing tanks are intermittently operated, the labor cost is also increased. Hidden dangers in production

Method used

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  • Low viscosity poly-alpha-olefin lubricant base oil, preparation method and system thereof

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preparation example Construction

[0043] The method for preparing low-viscosity poly-alpha-olefin lubricating oil base oil of the present disclosure makes the reaction aid and BF by heating in the gas-liquid separation device 3 Depolymerization of the formed complex can prepare polyalphaolefins with qualified F content and can continuously separate BF in polyalphaolefin products 3 Catalyst, without manual intermittent pouring, greatly reducing production safety hazards; this method can make poly-alpha-olefin products and BF 3 The catalyst is completely separated, and no F-containing wastewater is produced during the production process, and BF can be recycled 3 Catalyst, reducing catalyst waste.

[0044] According to the present disclosure, the gas-liquid separation device may include at least one of a gas-liquid separation tower, a gas-liquid separation tank, and a heat exchanger, preferably a gas-liquid separation tower, so as to control separation operating conditions and improve separation efficiency.

[...

Embodiment 1

[0067] Such as figure 1 As shown, in this embodiment, the gas-liquid separation tower 1 is used as the gas-liquid separation device, and the raw material containing α-olefin is 1-decene, which contains BF 3 BF in the catalyst 3 The content is 90%, the reaction auxiliary agent is 1-octanol, and the F content of the liquid phase product at the bottom of the tower is measured online by combustion ion chromatography (refer to ASTM D7359 for the specific method).

[0068] Make α-olefin raw material 1-decene, containing BF 3 The catalyst, circulating catalyst and reaction aid 1-octanol enter the polymerization reaction device 4 for polymerization reaction, the reaction temperature is 25°C; the reaction pressure is 0.15MPa; the raw material containing α-olefin, BF 3 The molar ratio of catalyst and 1-octanol is 1:0.01:0.01, resulting in BF-containing 3 The mixed product of catalyst, 1-octanol and poly-1-decene, the mixed product enters the gas-liquid separation tower 5 (the number ...

Embodiment 2

[0073] The process is carried out according to the method of Example 1, the difference is that the gas phase product at the top of the gas-liquid separation tower 5 is directly returned to the polymerization reaction device without passing through the first heat exchanger 6 and cooler 7 .

[0074] According to the method of this embodiment, after stable operation, the processing capacity of the mixed product entering the gas-liquid separation tower is 1kg / h, and the BF in the mixed product 3 The separation rate of the catalyst was 99.99%, and the F content in the hydrogenation product was 2 ppm.

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Abstract

The invention relates to low viscosity poly alpha lubricant base oil, a preparation method and system thereof. The method comprises the following steps: (1) polymerizing a raw material containing alpha-olefin, a catalyst containing BF3 and reaction auxiliaries in a polymerization device to obtain a mixed product containing the BF3 catalyst, reaction auxiliaries and poly alpha-olefin; (2) feeding the mixed product in a gas-liquid separation device, heating to separate liquid and gas to obtain a gaseous product mainly comprising the BF3 catalyst and a liquid mainly comprising the poly alpha-olefin; and (3) returning at least part of the gaseous product to the polymerization device. The poly alpha-olefin with qualified content of F, prepared by the method can be used for continuously separating the BF3 catalyst in the poly alpha-olefin product, does not need manual intermittent discharging, no F-containing wastewater in the producing process, the BF3 catalyst can be recycled, and catalystwaste can be reduced.

Description

technical field [0001] The disclosure relates to the field of preparation of lubricating oil base oils, in particular, to a low-viscosity poly-α-olefin lubricating oil base oil and a preparation method and system thereof. Background technique [0002] Lubricating oil specifications are becoming increasingly stringent, and the demand for high-quality lubricating oil and synthetic oil has increased significantly, and polyalphaolefin is one of the fastest growing varieties. It has the advantages of wide operating temperature range, good stability at low and high temperatures, low pour point, low volatility, good viscosity-temperature performance, high oxidation resistance, high viscosity index, etc. It can be used to prepare various high-grade engine oils, such as gasoline Engine oil, diesel engine oil, compressor oil, military lubricants, etc. [0003] Poly α-olefins are mainly long-chain alkanes obtained by polymerization of C8-C12 α-olefins under the action of a catalyst, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M107/10C10N20/02
CPCC10M107/10C10M2205/0285C10N2020/02C10N2030/40
Inventor 丁晖殿施昌智黄作鑫苏朔段庆华徐冰成欣么佳耀辛世豪赵敏
Owner CHINA PETROLEUM & CHEM CORP
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