Blend comprising group III and group IV basestocks

a technology of basestocks and blends, which is applied in the direction of base-materials, lubricant compositions, hydrocarbon oil treatment products, etc., can solve the problem of limited supply of both of these relatively expensive basestocks

Inactive Publication Date: 2006-09-21
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0032] A particular advantage of the present invention is that wax isomerate Group III materials are not necessary in a composition according to the invention in order to achieve certain specifications discussed in the Background section. Accordingly, in an embodiment, component (i) excludes wax isomerate materials. However, such materials are nonetheless contemplated as embodiments of Group III basestocks useful for blending with the PAO according to the invention. Likewise, a composition according to the present invention may include or it may exclude catalytically dewaxed Group III materials and it may also include or it may exclude solvent dewaxed Group III materials.
[0033] Representative of Group III basestocks are materials such as Visom, commercially available from ExxonMobil Lubricants and Specialties, and XHVI available from Shell, or materials such as described in U.S. Patent Applications 2004/0129603; 2004/0154957 and 2004/0154958.
[0034] While not critical to the broad invention contemplated, Group III basestocks may also be characterized by performance on the Cold Crank Simulator test (CCS), as discussed more fully below. A full

Problems solved by technology

There is currently a limited supply of both of these relatively expensive b

Method used

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  • Blend comprising group III and group IV basestocks
  • Blend comprising group III and group IV basestocks
  • Blend comprising group III and group IV basestocks

Examples

Experimental program
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example 2

[0064] As Example 1, except that the promoter system had BF3.butanol and BF3.butyl acetate and the residence times in the primary and secondary reactors were 0.5 hr and 1.3 hrs, respectively. The mole ratio of butanol to butyl acetate was 7 to 1; the weight ratio of free to complexed BF3 is 0.1:1. With the addition of BF3.butyl acetate in the promoter system, the conversion was lower and more trimers were produced as indicated by the higher QI of Example 2 compared to that of Example 1, as shown in Table 1.

example 3

[0065] Same as Example 2, except that the concentration of the BF3.butyl acetate complex was increased so that the promoter system had a BF3.butanol: BF3.butyl acetate ratio of 4:1; the weight ratio of free to complexed BF3 was 0.08:1. With the incorporation of more acetate in the promoter system, conversion is similar to that in Example 2, while the QI of the polymer, also shown in Table 1, is increased to 0.651.

example 4

[0066] Same as Example 2, except that the promoter system had a still further increase in BF3.butyl acetate so that the ratio of BF3-butanol to BF3-butyl acetate was 2.5:1, the reaction temperature was at 21° C., and the residence times in the primary and secondary reactors were 1.7 hrs and 0.7 hr, respectively. Again, as shown in Table 1, the QI increased still further with the simultaneous increase in temperature and acetate content, despite the higher conversion attained.

TABLE 11-Decene FeedResidenceTime inPrimary / Secondary%ReactionReactorsCon-Ex.Promoter SystemTemperature(in hours)versionQI1BF3-Butanol18° C.1.4 / 1800.37527:1 BF3-Butanol / 18° C.0.5 / 1.3760.575BF3-Butyl acetate34:1 BF3-Butanol / 18° C.0.5 / 1.3760.651BF3 Butyl Acetate42.5:1 BF3-Butanol / 21° C.1.7 / 0.7900.733BF3-Butyl Acetate

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Abstract

The invention relates to compositions comprising a blend of Group III basestocks and low volatility, low viscosity PAO basestocks. The blend is particularly useful for preparing finished lubricants that meet or even exceed the criteria for SAE Grade 0 W multi-grade engine oils. The combination of these low volatility, low viscosity PAOs with Group III basestocks provide, in embodiments, the necessary performance criteria in automatic transmission fluids, automotive or industrial gear oils, hydraulic fluids, or any other high performance lubricant requiring a combination of excellent low fluidity and low volatility.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of Provisional Application No. 60 / 662,608 filed Mar. 17, 2005, the disclosure of which is incorporated by reference.FIELD OF THE INVENTION [0002] The invention relates to compositions comprising a blend of Group III basestocks and low volatility, low viscosity PAO basestocks. The blend is particularly useful for preparing finished lubricants that meet or even exceed the criteria for SAE Grade 0 W multi-grade engine oils. BACKGROUND OF THE INVENTION [0003] Current technology requires either catalytically dewaxed, wax isomerate based Group III basestocks, or polyalphaolefins (PAOs) as the primary basestock to achieve certain requirements set by organizations such as ACEA (Association des Constructeurs d' Automobiles), ATIEL (Association Technique de L'Industrie Europeane des Lubrifiants), API (American Petroleum Institute), ILSAC (International Lubricant Standardization and Approval Committee), ASTM (Am...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10G71/00
CPCC10G50/02C10G69/126C10G2400/10C10M111/04C10M169/04C10M171/00C10M2203/1025C10M2205/0265C10M2205/0285C10N2220/022C10N2220/13C10N2230/02C10N2230/76C10N2240/04C10N2240/042C10N2240/044C10N2240/08C10N2270/00C10N2020/085C10N2020/02C10N2030/02C10N2030/76C10N2040/042C10N2040/044C10N2040/04C10N2040/08C10N2070/00
Inventor BULLOCK, CHARLES L. JR.YANG, NORMANCOOPER, KATHLEEN K.TEMME, NICOLE B.
Owner EXXONMOBIL CHEM PAT INC
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