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
View PDF15 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method consumes a lot of energy a

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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
Comparison scheme
Effect test

Example Embodiment

[0053] See figure 1 As shown, the preparation method of low-viscosity poly-α-olefin synthetic oil of the present invention specifically includes the following steps:

[0054] (1) The α-olefin raw material is dehydrated and refined 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) Feed the α-olefin raw material and recovered monomers and dimers (obtained from the following step (5)) into the reactor 2, and add the recovered complex catalyst (obtained from the following step (4)) And supplementary supplementary co-catalyst (water content ≤10ppm), filled with BF 3 To react, the co-catalyst and BF 3 Combine to obtain a complex catalyst.

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

[0057] Decompress...

Example

[0063] Examples 1~6

[0064] Use dehydrated and refined 1-decene (water content of 8ppm) as raw material to synthesize low-viscosity PAO, use butanol (water content of 9ppm) as a co-catalyst, and the ratio of butanol to 1-decene is 1:100 (material Amount), at 30℃, BF 3 The reaction was carried out under the pressure of 0.2MPa and the reaction time was 1h. The obtained reaction product was subjected to flashing treatment, and the flashing test was carried out with different flashing conditions (see Table 1, Examples 1-6) to obtain the first oil phase The gas phase, the flash gas, is pressurized and returned to the reactor, and the first oil phase enters the precipitator for precipitation treatment.

[0065] Table 1 Effect of flash evaporation process on BF 3 Removal effect

[0066]

Example

[0067] Examples 7-11:

[0068] Using the first oil phase of Example 3 as the precipitation feed (ie precipitation oil), the precipitation tests were carried out using different precipitation conditions (see Table 2, Examples 7-11) to obtain the second oil phase of the upper layer and the lower layer After the gas-liquid separation of the second oil phase, the resulting gas and flash steam are combined and compressed, and the remaining oil phase (ie degassed oil) undergoes alkaline washing and water washing to obtain water-washed oil (ie clean intermediate product). The fluorine content of the washing oil, and the composition of the lower catalyst layer were analyzed, as shown in Table 2.

[0069] Table 2 Settlement and separation of BF 3 Removal effect

[0070]

[0071] The intermediate product is continuously subjected to vacuum distillation to separate monomers and dimers, and then hydrogenates and is saturated to obtain poly-α-olefin synthetic oil.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products