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Synthesis of poly-alpha olefin and use thereof.

A technology of olefins and oligomers, which is applied in the field of lubricant compositions and can solve problems such as poor stability

Inactive Publication Date: 2004-11-24
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found that boron trifluoride catalysis causes excessive backbone branching during oligomerization
The increase in the amount of branching in the skeleton is directly related to the increase in the amount of easily oxidized tertiary hydrogen in the molecule, so it has poor stability when used in lubricants

Method used

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  • Synthesis of poly-alpha olefin and use thereof.
  • Synthesis of poly-alpha olefin and use thereof.
  • Synthesis of poly-alpha olefin and use thereof.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] A 120ml pressure reaction vial with a magnetic stirring bar was completely evacuated and then blown with argon. Then, 10 ml of anhydrous toluene (distilled with potassium treatment) and 10 ml of 1-tetradecene (dried over 5A molecular sieves) were added to the bottle. At 40° C., 4 ml of a 3.3 M methylaluminoxane solution in toluene was added to the reaction flask and stirred for 15 minutes. Then inject 4ml 6.2×10 into the bottle - 3 M's dichlorobis(cyclopentadienyl) zirconium in toluene to start the reaction. The temperature of the reaction system was controlled within ±1°C by a constant temperature bath. After 1 hour, 50 ml of 10% aqueous HCl was added to the reaction flask to stop the reaction, and the resulting mixture was stirred for 2 hours. The organic layer was then separated and further washed twice with 50 ml of deionized water. Subsequently, the toluene solvent was removed from the organic layer in a rotary evaporator. Analysis of the product mixture by hi...

Embodiment 2

[0087] The procedure was essentially the same as in Example 1, except that the reaction was carried out at 60°C. The oligomer yield was 86%. The oligomer contains about 60% dimers, 23% trimers, 8% tetramers, 4% pentamers and 5% higher oligomers.

Embodiment 3

[0089] The procedure was essentially the same as in Example 1, except that the reaction was carried out at 60°C and 2 ml of 3.3 M methylalumoxane in toluene was used. The oligomer yield was 87%. The oligomer contains approximately 68% dimers, 20% trimers, 7% tetramers, 3% pentamers and 2% higher oligomers.

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Abstract

One or more oligomers of an olefin are prepared in the presence of a single-site catalyst. Preferably, the olefin is an alpha-olefin, and the oligomers are a poly-alpha-olefin (PAO). The PAO so prepared is completely or substantially free of tertiary hydrogen resulting from isomerization. Consequently, the PAO possesses improved biodegradability, improved oxidation resistance, and / or a relatively higher viscosity index. The PAO has many useful applications, such as a component of a lubricant.

Description

field of invention [0001] The present invention relates to polyalphaolefin oligomers and processes for their preparation. More specifically, the present invention relates to a composition for use in lubricants and a method for preparing the composition. Background of the invention [0002] Synthetic hydrocarbons are utilized as components of automotive, aerospace and industrial lubricants. In the automotive industry, lubricants include engine oil, brake fluid and grease. Automobile engine oil includes 2-stroke oil, 4-stroke oil and gear oil. In aviation, lubricants include turbine oils, piston oils, hydraulic system fluids and greases. In industrial applications, lubricating oils are used as gas turbine oils, gear oils, bearing and circulating oils, compressor oils, hydraulic oils, metalworking fluids, heat transfer and insulation oils, and greases. [0003] Polyalphaolefins (PAOs) are synthetic hydrocarbons used as lubricant base oils. PAO has good low temperature flui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/34C07B61/00C07C9/22C07C11/02C08F4/64C08F4/659C08F4/6592C08F10/00C08F110/14C09G1/08C10L1/16C10M105/04C10M107/02C10M107/10C10M143/08C10N40/04C10N40/08C10N40/26
CPCC07C11/02C08F110/14C10N2220/021C10N2240/044C07C2/34C10N2240/042C07C9/22C10M143/08C08F10/00C10M107/10C10N2230/10C10N2230/02C10N2240/08Y10S526/943C10L1/1641C07C2531/14C08F4/65912C10M2205/0285C10M2205/028C10N2240/105C10N2220/022C07C2531/22C10N2220/10C10N2020/02C10N2020/04C10N2030/02C10N2030/10C10N2040/08C10N2040/26C10N2020/081C10N2040/042C10N2040/044C08F4/65925C08F2500/02
Inventor 宋卫W·J·海尔曼
Owner SHELL INT RES MAATSCHAPPIJ BV
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