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US 9,249,365 B2Granted
Process for grinding waxes using grinding aids in a jet mill, use of polyols as a grinding aid and wax powder comprising polyols
AssigneeSasol Wax GmbH
InventorUlrich Schneider
Life of this patent
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Abstract
The subject matter of the present invention is a process for grinding waxes, in particular paraffin waxes using a polyol as a grinding aid in a jet mill, in particular a fluidized bed counter-jet mill, wax powder thus produced containing the grinding aid and the use of the polyols as a grinding aid for waxes.
Claims23
A method for grinding waxes for producing wax powders, said method comprising
- providing a wax as grinding material;
- providing at least one polyol as a grinding aid;
- grinding the wax and the at least one polyol in a jet mill until a wax powder is formed, said wax powder having a) an average particle size d50 of less than 10 μm, b) an average particle size d90 of less than 15 μm, or c) both, wherein the polyol is present during the grinding process at 0.01 to 5.0% by weight relative to the total amount of wax powder plus polyol and wherein the wax powder comprises greater than 97.5% by weight of wax and polyol exclusively.
A wax powder comprising:
- 0.01 to 5.0% by weight of at least one polyol, relative to the total amount of wax powder plus polyol, wherein the wax powder comprises greater than 97.5% by weight of wax and polyol exclusively, and wherein the wax powder has a) an average particle size d50 of less than 10 μm, b) an average particle size d90 of less than 15 μm, or c) both.
Dependencies are inferred from the claim text.