US2008300157A1PendingUtilityA1

Lubricating oil compositions having improved low temperature properties

Individually held — no corporate assignee on recordPriority: Mar 30, 2007Filed: Mar 21, 2008Published: Dec 4, 2008

Est. expiryMar 30, 2027(~0.7 yrs left)· nominal 20-yr term from priority

Inventors:Margaret M. Wu David J. Baillargeon

C10M 2203/1025C10N 2030/10C10N 2020/071C10M 2203/065C10N 2030/02C10M 2205/0285C10M 2205/223C10M 2203/1006C10M 111/04C10N 2020/011C10N 2060/02C10M 111/06C10M 2205/173C10N 2020/02C10N 2030/08C10M 127/06

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References

Claims

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 0° C. or less. The pour point of the base oil is dramatically lowered by the addition of the synthetic oil.

Claims

exact text as granted — not AI-modified

1 . A method for reducing the pour point of Gas-to-Liquids (GTL) lube base stocks/base oils, hydrodewaxed or hydroisomerized/catalytic (and/or solvent) dewaxed waxy feed lube base stocks/base oils or mixture thereof by adding to such base stock/base oil from about 1 to 95 wt % of a synthetic alkylated naphthalene fluid having a kinematic viscosity at 100° C. in the range of from about 1.5 mm 2 /s to about 600 mm 2 /s, a pour point of &lt;0° C., a viscosity index in the range of from 0 to 200. 
   
   
       2 . The method of  claim 1  wherein the base stock/base oil which has its pour point reduced is a GTL base stock/base oil. 
   
   
       3 . The method of  claim 1  wherein the base stock/base oil which has its pour point reduced in a hydrodewaxed waxy feed lube base stock/base oil. 
   
   
       4 . The method of  claim 1  wherein the base stock/base oil which has its pour point reduced is a hydroisomerized/catalytic (and/or solvent) dewaxed waxy feed lube base stocks/base oil. 
   
   
       5 . The method of  claim 3  wherein the base stock/base oil which has its pour point reduced is a hydrodewaxed Fischer-Tropsch wax lube base stock/base oil. 
   
   
       6 . The method of  claim 4  wherein the base stock/base oil which has its pour point reduced is a hydroisomerized/catalytic (and/or solvent) dewaxed Fischer-Tropsch wax lube base stock/base oil. 
   
   
       7 . The method of  claim 1 ,  2 ,  3 ,  4 ,  5  or  6  wherein the alkylated naphthalene has the general formula 
     
       
         
         
             
             
         
       
     
     wherein n+m is an integer ranging from 1 to 8, R is a C 1  to C 30  linear alkyl group, a C 3  to C 300  branched alkyl group or mixture thereof, and wherein the total number of carbons in R n  and R m  is at least 4. 
   
   
       8 . The method of  claim 7  wherein n+m is an integer ranging from 1 to 6. 
   
   
       9 . The method of  claim 7  wherein n+m is an integer ranging from 1 to 5. 
   
   
       10 . The method of  claim 7  wherein R is a C 1  to C 20  linear alkyl group, C 3  to Cl 100  branched alkyl group or mixture thereof. 
   
   
       11 . The method of  claim 10  wherein R is a branched alkyl group containing at least 4 carbon and n+m is 1 or 2. 
   
   
       12 . The method of  claim 1 ,  2 ,  3 ,  4 ,  5  or  6  wherein the alkylated naphthalene is hydrogenated. 
   
   
       13 . The method of  claim 7  wherein the alkylated naphthalene is selected from the group consisting of mono-, di-, tri-, tetra-, or penta-C 3  alkyl naphthalene, C 4  alkyl naphthalene, C 5  alkyl naphthalene, C 6  alkyl naphthalene, C 8  alkyl naphthalene, C 10  alkyl naphthalene, C 1-2  alkyl naphthalene, C 1-4  alkyl naphthalene, C 1-6  alkyl naphthalene, C 18 , alkyl naphthalene, mono-, di-, tri-, tetra-, or penta-C 3  alkyl monomethyl, dimethyl, ethyl, diethyl or methyl ethyl naphthalene, C 4  alkyl monomethyl, dimethyl, ethyl, diethyl or methyl ethyl naphthalene, C 5  alkyl monomethyl, dimethyl, ethyl, diethyl or methyl ethyl naphthalene, C 6  alkyl monomethyl, dimethyl, ethyl, diethyl or methyl ethyl naphthalene, C 8  alkyl monomethyl, dimethyl, ethyl, diethyl or methyl ethyl naphthalene, C 10  alkyl naphthalene, C 1-2  alkyl monomethyl, dimethyl, ethyl, diethyl or methyl ethyl naphthalene, C 1-4  alkyl monomethyl, dimethyl, ethyl, diethyl or methyl ethyl naphthalene, C 1-6  alkyl monomethyl, dimethyl, ethyl, diethyl or methyl ethyl naphthalene, C 18 , alkyl monomethyl, dimethyl, ethyl, diethyl or methyl ethyl naphthalene, C 24 -C 56  branched alkyl naphthalene, or C 24 -C 56  branch alkyl mono, di-, tri- tetra- or penta-C 1 -C 4  naphthalene, and mixtures thereof. 
   
   
       14 . The method of  claim 13  wherein the alkylated naphthalene is hydrogenated. 
   
   
       15 . A method for reducing the pour point of Gas-to-Liquids (GTL) lube base stocks/base oils, hydrodewaxed or hydroisomerized/catalytic (and/or solvent) dewax waxy feed lube base stock/base oil or mixture thereof by adding to such base stock/base oil from about 1 to 95 wt % of an alkylated benzene synthetic fluid having a kinematic viscosity at 100° C. in the range of from about 1.5 mm 2 /s to about 600 mm 2 /s, a pour point of 0° C. or less and a viscosity index of from 0 to 200. 
   
   
       16 . The method of  claim 15  wherein the base stock/base oil which has to pour point reduced is a GTL base stock/base oil. 
   
   
       17 . The method of  claim 15  wherein the base stock/base oil which has its pour point reduced in a hydrodewaxed waxy feed lube base stock/base oil. 
   
   
       18 . The method of  claim 15  wherein the base stock/base oil which has its pour point reduced is a hydroisomerized/catalytic (and/or solvent) dewaxed waxy feed lube base stock/base oil. 
   
   
       19 . The method of  claim 17  wherein the base stock/base oil which has its pour point reduced is a hydrodewaxed Fischer-Tropsch wax lube base stock/base oil. 
   
   
       20 . The method of  claim 18  wherein the base stock/base oil which has its pour point reduced is a hydroisomerized/catalytic (and/or solvent) dewaxed Fischer-Tropsch wax lube base stock/base oil. 
   
   
       21 . The method of  claim 15 ,  16 ,  17 ,  18 ,  19  or  20  wherein the alkylated benzene has the general formula 
     
       
         
         
             
             
         
       
     
     wherein x is an integer ranging from 1 to 6, R is a C 10  to C 30  linear alkyl group, C 10  to C 300  branched alkyl group or mixture thereof wherein when x is 2 or greater than 2 one or more of the R group can be a C 1 -C 5  alkyl group provided however that there is one or more additional alkyl groups which is a C 10  to C 30  linear alkyl group or a C 10  to C 200  branched alkyl group or mixture thereof. 
   
   
       22 . The method of  claim 21  wherein x is an integer ranging from 1 to 5. 
   
   
       23 . The method or  claim 21  wherein x is an integer ranging from 1 to 4. 
   
   
       24 . The method of  claim 21  wherein the alkylated benzene has a pour point of −35° C. or less. 
   
   
       25 . The method of  claim 24  wherein the alkylated benzene has a pour point of −60° C. or less. 
   
   
       26 . The method of  claim 25  wherein the alkylated benzene is an alkyl methyl benzene prepared by oligomerizing a mixture of C 8 , C 10  and C 12  linear alpha olefins over a catalyst to produce an oligomerized product which is then arylated with toluene over a catalyst. 
   
   
       27 . A base oil for lubricating oil compositions, said base oil comprising one or more lubricating oil stocks selected from Gas-to-Liquids (GTL) lube base stocks/base oils, hydrodewaxed or hydroisomerized/catalytic (and/or solvent) dewaxed waxy feed lube base stocks/base oils and from about 1 to 95 wt % of an alkylated benzene synthetic fluid having a kinematic viscosity at 100° C. in the range of from about 1.5 mm 2 /s to about 600 mm 2 /s, a pour point of 0° C. or less and a viscosity index of from 0 to 200. 
   
   
       28 . The base oil of  claim 27  wherein the lubricating oil stock is GTL base stock/base oil. 
   
   
       29 . The base oil of  claim 27  wherein the lubricating oil stock is hydrodewaxed waxy feed lube base stock/base oil. 
   
   
       30 . The base oil of  claim 27  wherein the lubricating oil stock is hydroisomerized/catalytic (and/or solvent) dewaxed waxy feed lube base stock/base oil. 
   
   
       31 . The base oil of  claim 29  wherein the lubricating oil stock is hydrodewaxed Fischer-Tropsch wax lube base stock/base oil. 
   
   
       32 . The base oil of  claim 27  wherein the alkylated benzene has a pour point of −35° C. or less. 
   
   
       33 . The base oil of  claim 32  wherein the alkylated benzene has a pour point of −60° C. or less. 
   
   
       34 . The base oil of  claim 27 ,  32  or  33  wherein the alkylated benzene is an alkyl methyl benzene prepared by oligomerizing a mixture of C 8 , C 10  and C 12  linear alpha olefins over a catalyst to produce an oligomerized product which is then arylated with toluene over a catalyst.

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