LUBRICATING OIL COMPOSITIONS COMPRISING A HEAVY HIGH SATURATES BASE OIL

Abstract

A lubricating oil composition comprising a heavy high saturates base oil is provided. Methods for using said lubricant composition for lubricating an engine, a gear box, and in general industrial lubricant applications, including as a bearing and circulating oil, are also provided.

Claims

1. A lubricating oil composition comprising a heavy high saturates base oil.

2. A lubricating oil composition according to claim 1, wherein the heavy high saturates base oil comprises more than 80 wt % saturated hydrocarbons.

3. A lubricating oil composition according to claim 1 or 2, wherein the heavy high saturates base oil has a viscosity index of greater than 80.

4. A lubricating oil composition according to any one of claims 1 to 3, wherein the heavy high saturates base oil has a kinematic viscosity at 100 C. of at least 12 mm.sup.2/s.

5. A lubricating oil composition according to any one of claims 1 to 4, wherein the pour point is 5 C. or lower.

6. Use of lubricating oil composition according to any one of claims 1 to 5 for lubricating an engine, an industrial gear box, an automotive gear box, and use as a lubricant in general industrial lubricant applications including as a bearing and circulating oil.

Description

EXAMPLES

[0027] The kinematic viscosity at 100 C. and the percentage of saturated hydrocarbons (saturates %) of the base oils used in Samples A-H can be found in Table 1.

[0028] AC 2500 is a brightstock commercially available as Americas Core 2500 manufactured and sold by ExxonMobil Corporation. AC 2500 is a base oil derived from crude oils and manufactured using a solvent refining process, containing significant amounts of aromatic, sulphur, and nitrogen containing compounds.

[0029] SK 120BS is a Group II brightstock commercially available as SK 120BS manufactured and sold by SK Lubricants. SK 120BS is a heavy high saturates base oil derived from crude oils and manufactured using catalytic hydroprocessing, containing predominantly saturated hydrocarbons and very little, if any, sulphur and nitrogen compounds.

[0030] AP/E Core 600 is a Group I base oil commercially available as AP/E Core 600 manufactured and sold by ExxonMobil Corporation.

[0031] Shell 500N (Daesan) is a Group II base oil commercially available as Shell 500N (Daesan) manufactured and sold by Hyundai-Shell Base Oil Co.

[0032] Chevron 600R is a Group II base oil commercially available as Chevron 600R manufactured and sold by Chevron Corporation.

TABLE-US-00001 TABLE 1 Base Oil Properties AP/E Shell Test AC SK Core 500N Chevron Property Method 2500 120BS 600 (Daesan) 600R Kinematic ASTM 31.9 23.6 12.06 11.32 12.01 Viscosity D445 100 C., mm.sup.2/s Kinematic ASTM 493.3 318.5 112.1 95.07 101.2 Viscosity D445 40 C., mm.sup.2/s Viscosity ASTM 95 103 97 106 109 Index D2270 Saturates % IP 368 51.9 99.8 99.3 99.9 Pour Point ASTM 6 42 6 18 24 D5950

Preparation of Blend of Industrial Gear Oil Formulations

[0033] The Industrial Gear oil formulations were prepared by mixing the components as indicated in Table 2 and followed by stirring at 55 C. for 1 hour. Properties of these formulations can be found in Table 3.

TABLE-US-00002 TABLE 2 Industrial Gear Oil Formulations Sample A Components (Comparative) Sample B Viscosity Grade ISO 320 ISO 320 Concentrations in wt % AP/E Core 600 23.35 AC 2500 73.95 25 SK 120BS 72.3 Gear Oil Package.sup.1 2.5 2.5 Pour point depressant.sup.2 0.2 0.2 .sup.1Commercially available industrial gear oil additive package. .sup.2Commercially available pour point depressant.

TABLE-US-00003 TABLE 3 Industrial Gear Oil Performance Data Sample A Sample Property Test Method (Comparative) B Kinematic Viscosity, 40 C., ASTM D445 319.8 299.7 mm.sup.2/s Kinematic Viscosity, 100 C., ASTM D445 24.14 24.63 mm.sup.2/s VI ASTM D2270 96 104 Air Release @ 75 C., min ASTM D3427 23 21 Viscosity Increase at 100 C., ASTM D2893 8.08 4.15 %
Sample B shows performance advantages compared to Sample A including higher VI, lower pour point, faster air release, and better oxidation stability (indicated by lesser viscosity increase).

Preparation of Bearing and Circulating Oil Formulations

[0034] The Bearing and Circulating Oil Formulations as indicated in Table 4 were prepared by mixing the components used to prepare the formulations and followed by stirring at 55 C. for 1 hour. Properties of these formulations can be found in Table 5.

TABLE-US-00004 TABLE 4 Bearing and Circulating Oil Formulations Sample C Components (Comparative) Sample D Viscosity Grade ISO 320 ISO 320 Concentrations in wt % AP/E Core 600 23.87 AC 2500 75.6 16 SK 120BS 83.42 Bearing and circulating oil 0.43 0.43 additive package.sup.1 Pour point depressant.sup.2 0.1 0.1 Demulsifier.sup.3 300 ppm 300 ppm Anti-foam additive.sup.4 200 ppm 200 ppm .sup.1Commercially available bearing and circulating oil additive package. .sup.2Commercially available pour point depressant. .sup.3Commercially available demulsifier. .sup.4Commmercially available anti-foam additive.

TABLE-US-00005 TABLE 5 Bearing and Circulating Oil Performance Data Sample C Sample Property Test Method (Comparative) D Kinematic Viscosity, 40 C., ASTM D445 332.1 311.9 mm.sup.2/s Kinematic Viscosity, ASTM D445 24.58 24.37 100 C., mm.sup.2/s VI ASTM D2270 95 99 Pour Point, C. ASTM D5950 9 30 Air Release @ 75 C., ASTM D3427 17.11 14.38 min Air Release @ 50 C., ASTM D3427 83.21 56.64 min Oxidation Stability, ASTM D2272 550 1248 RPVOT (min)
Sample D shows performance advantages compared to Sample C including higher VI, lower pour point, faster air release, and better oxidation stability.

Preparation of Monograde Heavy Duty Diesel Engine Oil Formulations

[0035] The Monograde Heavy Duty Diesel Engine Oil Formulations as indicated in Table 6 were prepared by mixing the components used to prepare the formulations and followed by stirring at 55 C. for 1 hour. Properties of these formulations can be found in Table 7.

TABLE-US-00006 TABLE 6 Monograde Heavy Duty Diesel Engine Oil Formulations Sample E Components (Comparative) Sample F Viscosity Grade SAE 50 SAE 50 Concentrations in wt % Shell 500N (Daesan) 65.3 59.3 AC 2500 27.99 SK 120BS 33.99 HDEO Additive Package.sup.1 6.41 6.41 Pour point depressant.sup.2 0.3 0.3 .sup.1Commercially available HDEO monograde engine oil additive package. .sup.2Commercially available pour point depressant.

TABLE-US-00007 TABLE 7 HDEO Monograde Engine Oil Performance Sample E Sample Property Test Method (Comparative) F Kinematic Viscosity, 40 C., ASTM D445 175 169.8 mm.sup.2/s Kinematic Viscosity, 100 C., ASTM D445 17.03 17.06 mm.sup.2/s VI ASTM D2270 104 107 Pour Point, C. ASTM D5950 33 39 Pressure Differential CEC-L-085-99 101.2 98.8 Scanning Calorimetry, oxidation induction time (minutes)
Sample E shows performance advantages compared to Sample F including higher VI, lower pour point, and better oxidation stability.

Preparation of Automotive Gear Oil Formulations

[0036] The Automotive Gear Oil Formulations as indicated in Table 8 were prepared by mixing the components used to prepare the formulations and followed by stirring at 55 C. for 1 hour. Properties of these formulations can be found in Table 9.

TABLE-US-00008 TABLE 8 Automotive Gear Oil Formulations Sample G Components (Comparative) Sample H Viscosity Grade SAE 85W-140 SAE 85W-140 Concentrations in wt % Chevron 600R 10.5 AC 2500 85.6 44.8 SK 120BS 51.3 Automotive Gear Oil Additive Package.sup.1 3.7 3.7 Pour point depressant.sup.2 0.2 0.2 .sup.1Commercially available automotive gear oil additive package. .sup.2Commercially available pour point depressant.

TABLE-US-00009 TABLE 9 Automotive Gear Oil Performance Sample G Sample Property Test Method (Comparative) H Kinematic Viscosity, ASTM D445 343.9 326.3 40 C., mm.sup.2/s Kinematic Viscosity, ASTM D445 25.47 25.35 100 C., mm.sup.2/s VI ASTM D2270 97 100 Pour Point, C. ASTM D5950 15 33 Brookfield ASTM D2983 103000 32300 Viscosity, 12 C., cP DKA Oxidation CEC L-48-A-00, 198.3 98.9 Method B @ 150 C. (ASTM D7214) (Oxidation at FTIR)
Sample H shows performance advantages compared to Sample G including higher VI, lower pour point, lower Brookfield viscosity, and better oxidation stability.