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Improved utilization of linear alpha olefins in production of metallocene catalyzed poly-alpha olefins

A technology of metallocene catalyst and alpha olefin, applied in the field of poly alpha olefin production, can solve problems such as shortage of raw materials

Active Publication Date: 2010-12-22
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is an extremely important result, since there is currently a shortage of conventional raw materials

Method used

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  • Improved utilization of linear alpha olefins in production of metallocene catalyzed poly-alpha olefins

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Embodiment 1-3

[0073] This set of experiments was performed in a continuous reactor model. These runs produced PAO products with narrow molecular weight distributions and demonstrated that using non-coordinating anions (NCAs) as activators resulted in high lube oil yields. The olefins used in these runs were purified by passing through 3-5 Angstrom molecular sieves.

[0074] The metallocene catalyst used was dimethylsilylbis[tetrahydroindenyl]zirconium dimethyl and the activator used was N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate .

[0075] The catalyst solution was prepared by premixing the metallocene catalyst with the activator in a toluene solution to obtain 0.0025 g catalyst per 1 g solution. Perform experiments within a single CSTR system. The autoclave reactors used in these experiments ranged in size from 1 liter to 2 gallons. All raw materials are continuously introduced into the CSTR at a fixed flow rate. CSTR is controlled at a given reaction temperature. Cataly...

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Abstract

The invention is directed to a process for the preparation of lubricant base stocks by contacting alphaolefin feedstocks with single-site metallocene catalysts and recycling unconverted monomers, characterized by a purge step in the recycle.

Description

[0001] priority claim [0002] This application claims priority to and benefit from USSN 61 / 025200, filed January 31, 2008. field of invention [0003] The present invention relates to polyalphaolefin (PAO) production using metallocene catalysts. Background of the invention [0004] Efforts to improve natural mineral oil-based lubricants by synthesizing oligomeric hydrocarbon fluids have been the subject of significant research and development in the petrochemical industry for at least 50 years. These efforts have resulted in the relatively recent introduction of a number of synthetic lubricants on the market. [0005] With regard to improvements in lubricant performance, the thrust of industrial research efforts involving synthetic lubricants has been toward exhibiting useful viscosities over a broad temperature range, i.e., improved viscosity index (VI), while also exhibiting a viscosity equal to or better than that of mineral oils Fluids that are lubricious, thermally s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C10G50/02
CPCC08F4/65908C08F110/14C08F10/00C08F10/14C08F210/14C08F4/65927C08F2500/03C08F2500/17C08F2500/02
Inventor M·哈格梅斯特A·I·卡拉莫P·J·南达普卡S·提尔米兹M·M·伍
Owner EXXONMOBIL CHEM PAT INC
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