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Process for synthetic lubricant production

A technology of catalyst and accelerator, applied in the field of synthetic lubricant preparation, which can solve problems such as loss of lubricating oil yield

Inactive Publication Date: 2011-02-16
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, the light fractions in the metallocene oligomerization process represent a loss in lube oil yield if they cannot be converted to lube oil products by other means

Method used

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  • Process for synthetic lubricant production
  • Process for synthetic lubricant production
  • Process for synthetic lubricant production

Examples

Experimental program
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Effect test

Embodiment

[0040] Metallocene PAOs can be synthesized using batch mode operation using the following exemplary procedure. A stock solution of purified 1-decene (50 g) and 3.173 g of triisobutylaluminum (TIBA) was injected into a 500 ml flask under nitrogen atmosphere. The reaction flask was then heated to 120° C. with stirring. Another funnel installed on the reaction flask contains 20g toluene, 0.079g TIBA raw material solution, 0.430g rac-ethylenebis(4,5,6,7-tetrahydro-1-indenyl) dichloride A solution of zirconium solution and 0.8012 NCA stock solution was added to the 1-decene mixture within 15 minutes while maintaining the reaction temperature close to 120°C, not more than 3°C up or down. The reaction mixture was stirred at the reaction temperature for 16 hours. The heat was then switched off and the mixture was quenched with 3 ml of isopropanol. The crude product was then washed three times with 100 ml of 5% aqueous NaOH followed by 100 ml of deionized water. The organic layer w...

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Abstract

A process for the preparation of oligomeric poly alpha-olefins includes oligomerizing low molecular weight PAO oligomer in the presence of a Lewis acid catalyst such as promoted aluminum trichloride or boron trifluoride under oligomerization conditions. The low molecular weight PAO oligomers used as a feed or feed component of the present process are the light olefinic by-product fractions including the dimers and light fractions from the metallocene-catalyzed PAO oligomerization process which are characterized by a molecular weight of 150 to 600 and a terminal olefin (vinylidene) content of at least 25%.

Description

field of invention [0001] The present disclosure relates to improved production methods for poly-alpha-olefins (PAOs) useful as synthetic lubricant basestocks. Background of the invention [0002] PAOs have been recognized for more than 30 years as a class of materials that are particularly suitable as building blocks for high-performance synthetic lubricants. They have good low temperature fluidity, high thermal and oxidative stability, low evaporation loss at high temperature, high viscosity index, good friction behavior, good hydrolytic stability, and good corrosion resistance. PAOs are non-toxic and miscible with mineral oils, other synthetic hydrocarbon liquids, fluids and esters. Thus, PAOs are suitable for use in engine oils, compressor oils, hydraulic oils, gear oils, greases and functional fluids. The term PAO has been used broadly and commonly to name these lubricant basestocks, although the initial olefin oligomers are hydrogenated prior to use as basestocks to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/02
CPCC07C2/22C08F210/14C07C2527/126C10G2400/10C07C2531/22C07C2/34C10G50/02C07C2531/14C08F2500/17
Inventor A·O·帕蒂尔N·扬M·M·吴
Owner EXXONMOBIL CHEM PAT INC
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