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Lubricating base oil with high monocycloparaffins and low multicycloparaffins

一种润滑基础油、单环烷烃的技术，应用在润滑基础油领域，能够解决粘度指数和氧化稳定性降低等问题，达到低挥发度、优异氧化稳定性、粘度指数高的效果

Inactive Publication Date: 2007-01-31
CHEVROU USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High aromatic content will result in lower viscosity index and oxidation stability

Method used

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  • Lubricating base oil with high monocycloparaffins and low multicycloparaffins
  • Lubricating base oil with high monocycloparaffins and low multicycloparaffins
  • Lubricating base oil with high monocycloparaffins and low multicycloparaffins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、 Embodiment 2 and comparative example 3

[0140] Three lubricating base oils with kinematic viscosities below 3.0 cSt at 100°C were prepared by dewaxing the Fischer-Tropsch wax by hydroisomerization and fractionating the isomerized oil into different fractions. The properties of these samples are shown in Table II.

[0141] performance

Embodiment 1

[0142] In Example 1 and Example 2, all the molecular weight percentages containing at least one aromatic functional group are low, all the molecular weight percentages containing at least one cycloalkane functional group are high, and the molecular weight percentage containing monocycloalkane is the same as the molecular weight percentage containing polycycloalkane The percentage ratio is high. Note that the weight percentage of all molecules containing at least one cycloalkane functional group in Example 1 is not greater than 10, but the weight percentage of all molecules containing at least one cycloalkane functional group is greater than 100°C kinematic viscosity times 3. In Example 1, the ratio of the pour point to the kinematic viscosity at 100°C is high, which meets the performance of the preferred lubricating base oil of the present invention. Furthermore, the aniline points of Examples 1 and 2 are below the line given by the formula: 36×Ln (kinematic viscosity at 100° ...

Embodiment 4、 Embodiment 5、 Embodiment 6 and Embodiment 7

[0144] Four lubricating base oils with kinematic viscosities at 100°C between 4.0 and 5.0 cSt were prepared by hydroisomerization dewaxing Fischer-Tropsch wax and fractionating the isomerized oil into different fractions. The properties of these examples are shown in Table III.

[0145] performance

[0146] Examples 4, 5, 6 and 7 all have the properties required for the lubricating base oil of the present invention. Examples 4 and 7 have exceptionally high oxidation stability, greater than 40 hours. Examples 4 and 7 also had low aniline points, which would provide desirable additive solubility and elastomer compatibility.

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Abstract

A composition of lubricating base oil having a weight percent of all molecules with at least one aromatic function less than 0.30, a weight percent of all molecules with at least one cycloparaffin function greater than 10, and a ratio of weight percent of molecules with monocycloparaffins to weight percent of molecules with multicycloparaffins greater than 15.

Description

field of invention [0001] The present invention relates to: a) a lubricating base oil having a low aromatic content, a high weight percent of all molecules containing at least one naphthenic functional group and a high ratio of the weight percent of molecules containing monocycloparaffins to the percent by weight of molecules containing polycycloparaffins; and b) the production method of the lubricating base oil of the present invention. Background of the invention [0002] Finished lubricants and greases used in many applications including automotive, diesel engines, natural gas engines, axles, transmissions and industrial applications consist of two general components, lubricating base oils and additives. Lubricating base oils are the major constituents in these finished lubricants and contribute significantly to the performance of the finished lubricant. In general, a wide variety of finished lubricants can be produced from a small number of lubricating base oils by vary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M101/02C10G45/58C10G71/00C10G2/00
CPCC10G2400/10C10G2/32Y10S208/95
Inventor S·M·阿伯内西D·C·克拉默J·M·罗森鲍姆S·J·米勒R·R·克鲁格
Owner CHEVROU USA INC
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