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Tetra-substituted cyclopentanyl poly-alpha-alkene and preparation thereof

A technology of cyclopentane group polymerization and cyclopentyl group, which is applied in the field of tetra-substituted cyclopentyl group polyalphaolefin and its preparation, can solve the problem that it is difficult to obtain high-viscosity lubricating oil and the like, and achieve the effect of high viscosity index

Inactive Publication Date: 2009-05-27
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to obtain high-viscosity lubricating oils by the current method of preparing poly-alpha-olefin synthetic oils from alpha-olefins, especially lubricating oils with a viscosity greater than 22 centistokes at 100°C

Method used

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  • Tetra-substituted cyclopentanyl poly-alpha-alkene and preparation thereof
  • Tetra-substituted cyclopentanyl poly-alpha-alkene and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1. Cyclopentadiene and alpha octene copolymerization

[0016] 25g of cyclopentadiene was mixed with 210g of 1-octene, and 8g of zinc dichloride catalyst was added into the reaction vessel at the same time. Blow dry nitrogen, heat to 60-180°C, and keep stirring for 1-10 hours. After the reaction, add aqueous sodium hydroxide solution (5%) to wash and remove zinc dichloride. Add water to wash until the pH is neutral. After removing the water, distill under reduced pressure to 100-250°C to remove the light fraction, and the residue is the desired product. n is 6.

[0017] The properties of the resulting product are as follows:

[0018] Kinematic viscosity (40°C): 403mm 2 / s

[0019] Kinematic viscosity (100°C): 40mm 2 / s

[0020] Viscosity index: 150

[0021] Pour point (°C): less than -20°C

[0022] Specific gravity: 0.827

[0023] Flash point: 278°C

Embodiment 2

[0024] Embodiment 2. Cyclopentadiene and alpha decene copolymerization

[0025] Preparation of cyclopentyl polyalphaolefin: 25g of cyclopentadiene was mixed with 300g of 1-decene, and 8g of zinc dichloride catalyst was added into the reaction vessel at the same time. Blow dry nitrogen, heat to 60-180°C, and keep stirring for 1-10 hours. After the reaction was completed, an aqueous sodium hydroxide solution (5%) was added to wash and remove aluminum trichloride. Add water to wash until the pH is neutral. After removing the water, distill under reduced pressure to 100-250°C to remove the light fraction, and the residue is the desired product. n is 7.

[0026] The properties of the resulting product are as follows:

[0027] Kinematic viscosity (40°C): 430mm 2 / s

[0028] Kinematic viscosity (100°C): 56mm 2 / s

[0029] Viscosity index: 150

[0030] Pour point (°C): less than -20°C

[0031] Specific gravity: 0.83

[0032] Flash point: 260°C

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Abstract

The invention discloses tetra-substituted cyclopentane-based poly-alpha olefin and a preparation method thereof. The compound has a chemical structure shown as formula (I), wherein n represents the number of chain links of cyclopentane-based poly-alpha olefin and is an integer from 2 to 10; and alpha olefin represents 1-octene or 1-decene. The compound is copolymerized through cyclopentadiene and 1-octene or 1-decene and can be used as a lube. The compound has high viscosity and viscosity index, can increase the viscosity by 5 to 6 times compared with similar poly-alpha olefin without a cycloalkyl structure and improves the viscosity index. In addition, the compound has excellent high- and low-temperature performance and good viscosity-temperature performance and volatility.

Description

technical field [0001] The invention relates to a tetrasubstituted cyclopentyl polyalphaolefin and a preparation method thereof. Background technique [0002] Polyalphaolefin is a commonly used lubricating oil, which is widely used in various friction parts. Its advantages are good viscosity-temperature performance, low volatilization, good thermal stability and oxidation stability at high temperature, plus shear stability, chemical inertness, excellent electrical properties, and can be used as damping fluid and hydraulic pressure in a wide temperature range. oils and lubricants etc. Its production is mainly prepared by α-olefin copolymerization, so the degree of polymerization of α-olefin directly affects the viscosity of lubricating oil. It is difficult to obtain high-viscosity lubricating oil, especially lubricating oil with a viscosity greater than 22 centistokes at 100° C., by the current method of preparing poly-alpha-olefin synthetic oil using alpha-olefin as a raw ...

Claims

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Application Information

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IPC IPC(8): C10G50/02C07C2/38
Inventor 冯大鹏张霖徐斌刘维民
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI