Lubricating oil compositions having improved low temperature properties

A technology of lubricating oil and mixture, applied in the field of lubricating oil, can solve the problems of reducing the yield of process lubricating oil and so on

Inactive Publication Date: 2010-02-10
EXXON RES & ENG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If one were to make a GTL-derived basestock with a pour point significantly below -25°C, the process lube yield would be significantly lower, which is not ideal

Method used

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  • Lubricating oil compositions having improved low temperature properties
  • Lubricating oil compositions having improved low temperature properties
  • Lubricating oil compositions having improved low temperature properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0203] Various base stocks were used to blend with the alkylated naphthalene fluids in the examples, and these base stocks are shown below, combined with varying amounts of the alkylated naphthalene fluid AN5, to show the effect on the pour point (in °C report)

[0204] Table 2

[0205] Wt% AN5 0 5 20 60 100

[0206] First class -21 -27 -29 -32 -39

[0207] Class III -25 -26 -28 -32 -39

[0208] GTL-6 -21 -27 -36 -42 -39

[0209] PAO-6 -58 -58 -50 47 -39

[0210] As shown, there is no synergistic improvement in the pour point when alkylated naphthalene (AN5) is blended with API Group I or Group III basestocks. Although the pour points of these blends were reduced, the reduction was never below that of the AN basestock. AN actually degrades pour point performance when combined with PAO. However, when AN was blended with GTL-6 (which had a pour point of -21°C), the improvement in pour point associated with the blend was non-linear (see figure 1 and Table 3). The data in...

Embodiment 2

[0214] Different amounts of AN5 (as described above) were mixed with GTL-14 (with a nominal kinematic viscosity of 14mm at 100°C 2 / s) combination. The results are shown in Table 4 below:

[0215] Table 4

[0216] wt% of AN5

[0217] As can be seen, the pour point of the GTL is in turn improved synergistically by the addition of alkylated naphthalene fluid.

Embodiment 3

[0219] Various amounts of AN12 (as described above) were combined with GTL-6. The results are shown in Table 5.

[0220] table 5

[0221] wt% of AN12

[0222] It can also be seen that the addition of alkylated naphthalene, in this case AN of high measured viscosity, to GTL-6 causes the blend to exhibit a non-linear decrease in pour point. Additionally, the oxidative stability of the blends is synergistically improved. The RBOT increased from 68 minutes to 111 minutes when 20 wt% of AN12 was added.

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Abstract

A lubricating base oil is disclosed comprising a mixture of gas-to- liquids (GTL) base stock/base oil, hydrodewaxed or hydroisomerized/catalytic (and/or solvent) dewaxed wax derived base stock/base oil and from about 1 to 95% by weight of an alkylated naphthalene or alkylated benzene synthetic oil having a pour point of 00C or less. The pour point of the base oil is dramatically lowered by the addition of the synthetic oil.

Description

technical field [0001] The present invention relates to lubricating oils having improved low temperature properties, especially viscometrics, and a low pour point, and to methods for improving said low temperature properties, especially viscometrics, and for reducing natural gas synthesis (GTL) Pour point method for lubricating oils. Background technique [0002] Lubricating oils and formulated oils (i.e., oils containing a lubricant base stock / base stock and a mixture of one or more performance additives) used in most lubrication processes must be able to provide lubricating properties at low temperatures, which are low start-up temperature or maintain a low operating temperature. [0003] For this reason, lubricating oils are required to have good low temperature properties, especially reduced low temperature measured viscosity. Importantly, these lubricants are able to flow to critical machine or engine components to provide lubrication at very low temperatures. The fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M127/06
Inventor 玛格丽特·M·伍大卫·J·巴亚尔容
Owner EXXON RES & ENG CO
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