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Lubricating oil with high oxidation stability

一种润滑油、基础油的技术，应用在润滑油领域，能够解决基础油昂贵、不能大量获得等问题

Inactive Publication Date: 2012-07-11
CHEVROU USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these types of base oils are expensive and not available in large quantities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] Hydrotreated cobalt-based Fischer-Tropsch wax has the following properties:

[0122] Table I

[0123] nature

[0124] Two base oils, FT-7.3 and FT-14, were prepared from the hydrotreated cobalt-based Fischer-Tropsch wax by hydroisomerization dewaxing, hydrofinishing, fractionation and blending to target viscosity. The properties of the base oil are shown in Table II.

[0125] Table II

[0126] Sample properties

[0127] FT-14 is an example of a base oil used in the lubricating oil of the present invention. It has greater than 35% by weight of all molecules with cycloparaffinic functionality and a high viscosity index.

Embodiment 2

[0129] Two ISO 46 hydraulic oil blends using the FT-7.3 and FT-14 described were blended with a commercial liquid zinc antiwear (AW) hydraulic oil additive package. The hydraulic fluid additive package comprises a liquid antioxidant additive concentrate mixed with other additives. Each of the two blends had no added viscosity index improver. The formulations of these two hydraulic oil blends are summarized in Table III.

[0130] Table III

[0131] Component, Wt%

[0132] The properties of these two different hydraulic oil blends are shown in Table IV.

[0133] Table IV

[0134] nature

[0135] HYDA and HYDB are examples of lubricating oils of the present invention having high oxidation stability and high VI. Due to the unique qualities of the base oils used, a high VI can be achieved without any viscosity index improvers. Surprisingly, the oxidation stability according to the RPVOT test is as high as the base oil used for Oxidator BN with relatively hi...

Embodiment 3

[0137] Using conventional Group I or II base stocks, with or without the addition of viscosity index improvers or seal swell agents, and using the same commercial liquid zinc AW hydraulic oil additive package as the blend described in Example 2, 3 was prepared. A contrasting concoction. The formulations of these comparative blends are summarized in Table V.

[0138] Table V

[0139]

Component, Wt%

Compared

HYDC

vs. HYDD

vs. HYDE

Hydraulic oil AW additive package

0.73

0.73

0.73

Group I base oil

99.17

0.00

0.00

Group II base oil

0.00

99.07

93.16

PMA PPD

0.10

0.20

0.20

Viscosity Index Improver

0.00

0.00

5.11

seal expansion agent

0.00

0.00

0.80

total

100.00

100.00

100.00

[0140] The properties of these three different comparative hydraulic oil...

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Abstract

A lubricating oil (made from Group III base oil having a sequential number of carbon atoms) having a VI between 155 and 300, a RPVOT greater than 680 minutes, and a kinematic viscosity at 40 DEG C. from 19.8 cSt to 748 cSt. A lubricating oil having a high VI and high RPVOT comprises: a) a Group III base oil with a sequential number of carbon atoms, and defined cycloparaffin composition or low traction coefficient, b) an antioxidant additive concentrate and c) no VI improver. A process comprising: a) hydroisomerization dewaxing of a waxy feed, b) fractionating the produced base oil, c) selecting a fraction having a VI greater than 150, and a high level of molecules with cycloparaffinic functionality or a low traction coefficient, and d) blending the fraction with an antioxidant additive concentrate. Also, a method of improving the oxidation stability of a lubricating oil is provided.

Description

field of invention [0001] The present invention relates to lubricating oils having a high viscosity index and excellent oxidation stability, methods of preparing lubricating oils having excellent oxidation stability, and methods of improving the oxidation stability of lubricating oils. Background of the invention [0002] WO 00 / 14183 and US 6,103,099 to ExxonMobil teach a process for the production of isoparaffinic lubricant base stocks comprising the Fischer-Tropsch synthesis of waxy, paraffinic, containing 650-750°F+ hydrocarbons hydroisomerization of a hydrocarbon feedstock at a conversion level of said 650-750°F+ feedstock hydrocarbon sufficient to produce a hydroisomerized basestock of 650-750°F+, wherein The hydroisomerized base stock comprises the base stock which, when mixed with at least one lubricant additive, produces a lubricant meeting desired specifications. Patent protection is claimed for hydraulic fluids, but does not teach related manufacturing methods or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G71/00C10G35/00
CPCC10N2230/10C10M2205/173C10N2240/08C10M2203/045C10N2220/025C10M107/02C10N2220/022C10M171/02C10M2209/084C10N2230/43C10N2020/02C10N2020/065C10N2030/10C10N2030/43C10N2040/08C10M171/00C10M105/04C10M105/06
Inventor W·洛J·罗森鲍姆N·J·伯特兰德P·勒迈R·弗拉兹尔M·E·冈崎
Owner CHEVROU USA INC