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Preparation method for low-viscosity poly-alpha-olefin synthetic oil

An olefin synthetic oil, low viscosity technology, applied in the treatment of hydrocarbon oil, hydrocarbon oil treatment products, production of liquid hydrocarbon mixtures, etc., can solve the problems of easily causing corrosion, large energy consumption, etc., reducing operating costs, realizing recovery, and operation. easy effect

Active Publication Date: 2018-07-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method consumes a lot of energy and is prone to corrosion and other problems.

Method used

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  • Preparation method for low-viscosity poly-alpha-olefin synthetic oil
  • Preparation method for low-viscosity poly-alpha-olefin synthetic oil
  • Preparation method for low-viscosity poly-alpha-olefin synthetic oil

Examples

Experimental program
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Effect test

preparation example Construction

[0053] see figure 1 Shown, the preparation method of low-viscosity polyalpha-olefin synthetic oil of the present invention specifically comprises the following steps:

[0054] (1) Dehydrating and refining the α-olefin raw material through a molecular sieve fixed bed (ie molecular sieve dehydration tower 1), so that the water content of the raw material is ≤ 10ppm;

[0055] (2) Put the α-olefin raw material and the recovered monomer and dimer (obtained by the following step (5)) into the reactor 2, and add the reclaimed complex catalyst (obtained by the following step (4)) And supplementary co-catalyst (water content ≤ 10ppm), filled with BF 3 To carry out the reaction, co-catalyst with BF 3 Combined to obtain a complex catalyst.

[0056] (3) Polymerization product flash treatment: the reaction product is flashed through flasher 3 to obtain the first oil phase and gas phase, the catalyst activity is terminated, and BF is recovered 3 ,Recycling.

[0057] Vacuum Flash BF 3 ...

Embodiment 1～6

[0064] The low-viscosity PAO is synthesized from dehydrated and refined 1-decene (water content is 8ppm), and butanol (water content 9ppm) is used as a cocatalyst, and the amount ratio of butanol and 1-decene is 1:100 (substance volume), at 30°C, BF 3 Pressure is the reaction under the condition of 0.2MPa, and the reaction time is 1h, and the obtained reaction product is subjected to flashing treatment, adopts different flashing conditions to carry out flashing test (see Table 1, get embodiment 1-6) respectively, obtains the first oily phase And the gas phase, the gas phase, that is, the flash gas is pressurized and returned to the reactor, and the first oil phase enters the precipitator for precipitation treatment.

[0065] Table 1 Flash process on BF 3 The removal effect of

[0066]

Embodiment 7～11

[0068] With the first oil phase of embodiment 3 as precipitation feedstock (i.e. precipitation oil), adopt respectively different precipitation conditions to carry out precipitation test (see table 2, obtain embodiment 7-11), obtain the second oil phase of upper strata and lower layer catalyst layer, the second oil phase is separated from gas and liquid, the resulting gas and flash gas are combined and compressed, and the remaining oil phase (i.e. degassed oil) is subjected to alkali washing and water washing treatment to obtain water-washed oil (i.e. clean intermediate product). The fluorine content of the oil was washed with water, and the composition of the lower catalyst layer was analyzed, which is listed in Table 2.

[0069] Table 2 Sedimentation separation on BF 3 The removal effect of

[0070]

[0071] Intermediate products continue to undergo vacuum distillation to separate monomers and dimers, and then undergo hydrogenation and saturation treatment to obtain poly...

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Abstract

The invention provides a preparation method for low-viscosity poly-alpha-olefin synthetic oil. The preparation method comprises the following steps: subjecting raw materials to dehydration; then withBF3 alcohol or an organic acid complex as a catalyst, carrying out oligomerisation at a temperature of 0 to 100 DEG C and a pressure of 0 to 1.0 MPa; after completion of oligomerisation, subjecting areaction product to flash evaporation and separating a gas-phase BF3 catalyst; compressing the gas-phase BF3 for recycling, subjecting an oil phase to precipitation or centrifugation so as to separatethe complexation catalyst and poly-alpha-olefin lubricating oil, recycling the complexation catalyst, washing the oil phase with alkaline water; and carrying out pressure-reduced distillation on a clean intermediate product so as to separate monomers and dimmers, and then carrying out hydrotreatment so as to obtain saturated poly-alpha-olefin lubricating oil base oil.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a method for preparing synthetic oil from a low-viscosity polyalpha-olefin. Background technique [0002] Regarding low-viscosity poly-α-olefin synthetic oil as lubricating oil and its 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 molar ratio of catalyst to olefin...

Claims

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Application Information

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IPC IPC(8): C10G50/02
CPCC10G50/02C10G2300/1088C10G2400/10C10G2400/22
Inventor 马克存徐显明褚洪岭王斯晗王桂芝王力搏刘通蒋岩孙恩浩刘丽军曹媛媛贺德福于部伟高晗徐婷婷焦立军孙维林如海王秀绘王亚丽韩云光黄付玲韩雪梅
Owner PETROCHINA CO LTD
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