Pour point depressants and their use
AssigneeThe Lubrizol Corporation
InventorsGregory L. Hiebert, Marvin B. DeTar
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Abstract
The pour point of paraffin-containing liquids is reduced by adding to the liquid an effective amount of a pour point depressant which is the reaction product of a hydrocarbyl-substituted phenol having a number average of greater than 30 carbon atoms in the hydrocarbyl-substituent, and an aldehyde of 1 to about 12 carbon atoms, or a source therefor. The pour point depressant is particularly useful for treating crude oils which have an initial pour point of 4.degree. C. or higher.
Claims39
A wax-containing liquid composition comprising:
- (a) a wax-containing liquid which exhibits an initial pour point of at least 4.degree. C., and
- (b) an amount, sufficient to reduce the pour point of said wax-containing liquid, of a pour point depressant comprising the reaction product of (a) a hydrocarbyl-substituted phenol having a number average of at least 30 carbon atoms in the hydrocarbyl-substituent, and (b) an aldehyde of 1 to about 12 carbon atoms, or a source therefor.
A method for reducing the pour point of a wax-containing liquid which exhibits an initial pour point of at least 4.degree. C., comprising adding to said liquid a pour-point reducing mount of a pour point depressant comprising the reaction product of (a) a hydrocarbyl-substituted phenol having a number average of at least 30 carbon atoms in the hydrocarbyl-substituent, and (b) an aldehyde of 1 to about 12 carbon atoms, or a source therefor.
Dependencies are inferred from the claim text.