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Method for preparing poly-alpha-olefin from 1-octene

A technology of alpha olefins and octene, which is applied in the field of preparing polyalphaolefins from 1-octene, and can solve problems such as low viscosity index

Inactive Publication Date: 2005-08-17
HONAM PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PAOs prepared from 1-hexene or 1-octene have a lower viscosity index, a measure of stability, than PAOs prepared from 1-decene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] 300 ml of 1-octane was added to a 1 L reactor equipped with a stirrer, cooling coil and thermometer maintained at 30°C under a nitrogen atmosphere.

[0025] In addition, 1-decene was added to 5.4ml of 3.4M ethylaluminum dichloride (EADC) and 2.1ml of 8.99M tert-butyl chloride (TBC) respectively, so that the total volume was 21ml, and the molar ratio of EADC and TBC was 1 : 1. The mixture is then filled into a syringe. Here the molar ratio of 1-octene to 1-decene is 10:1.

[0026] A 500 ml four-necked flask equipped with a stirrer, a condenser with cooling coil and a thermometer was maintained at 30°C under a nitrogen atmosphere. A mixture of EADC and TBC diluted with 1-decene was injected into the flask with stirring via a microsyringe over 5 minutes and stirred for an additional 5 minutes to obtain a prepolymer. The prepolymer was then immediately added to the syringe.

[0027] Next, the prepolymer was added to the 1-L reactor containing 1-octene with a microsyring...

example 2

[0030] The procedure described in Example 1 was followed for prepolymerization and reactor preparation. The following procedures were carried out in the same manner as described in Example 1, except that, in order to obtain polyalphaolefins with low dynamic viscosity (yield: 76.8 wt%) after removal of catalyst residues, distillation and filtration, the obtained prepolymer was used Microsyringes were added to the 1 L reactor over 10 minutes.

[0031] The polyalphaolefin thus obtained was also measured for kinematic viscosity and viscosity index as described in Example 1. The measurement results are listed in Table 1.

example 3

[0033] 300ml of 1-octane was added to the 1L reactor in the same manner as described in Example 1. In addition, 1-decene was added to 5.4ml 3.4M ethyl aluminum dichloride (EADC) and 2.1ml 8.99M tert-butyl chloride (TBC) respectively, so that the total volume was 12.4ml, and the molar ratio of EADC and TBC was 1 : 1. The mixture is then filled into a syringe. Here the molar ratio of 1-octene to 1-decene is 20:1.

[0034] The following procedure was carried out in the same manner as described in Example 1, except that the prepolymer was added to the 1L reactor with a microinjector for 20 minutes, and polyalphaolefin (productivity was 80.4wt) was obtained after removing catalyst residue, distillation and filtration. %).

[0035] The polyalphaolefin thus obtained was also measured for kinematic viscosity and viscosity index as described in Example 1. The measurement results are listed in Table 1.

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Abstract

Disclosed is a method for preparing a high-viscosity polyalphaolefin, chiefly useful as an industrial oil, with high yield under conditions of the room temperature and atmospheric pressure, the method including: prepolymerizing 1-decene or 1-dodecene using a catalyst composed of ethyl aluminum dichloride (EADC) and t-butyl chloride (TBC) to obtain a prepolymer, and bringing 1-octene into contact with the prepolymer used as a catalyst under conditions of the room temperature and atmospheric pressure. Using the method makes it possible to prepare a high-viscosity polyalphaolefin from 1-octene less expensive than 1-decene or 1-dodecene, the polyalphaolefin having a kinetic viscosity of at least 90 cSt at 40 DEG C and a viscosity index of at least 135 to overcome the problem with a low-viscosity polyalphaolefin from 1-decene or 1-dodecene.

Description

technical field [0001] The present invention relates to a process for the preparation of polyalphaolefins from 1-octene, and more particularly to a process using 1-decene in the presence of ethylaluminum dichloride (EADC) and tert-butyl chloride (TBC). The invention relates to a method for preparing high-viscosity polyalphaolefin mainly used as industrial oil from 1-octene at normal temperature and pressure with a high-yield catalyst obtained by polymerization. Background technique [0002] In general, polyalphaolefins have excellent fluidity over a wide temperature range due to their high viscosity index and low-temperature fluidity, as well as narrow molecular weight distributions that allow for low heat loss and high stability for long-term use, while Suitable as a basic raw material for automotive or industrial oils. [0003] With the development of the industry, many studies on the preparation of polyalphaolefins have been carried out. [0004] Important references ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/52C08F210/14C08F255/00C08F255/08C08F297/08
CPCC08F297/08C08F210/14C08F255/08C08F255/00
Inventor 李安基崔炳烈白成铉金丙馹
Owner HONAM PETROCHEM
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