Process for Preparing High Concentration Dispersions of Lithium Hydroxide Monohydrate and of Anhydrous Lithium Hydroxide Oils
AssigneeThe Lubrizol Corporation
InventorsDavid M. Hobson, Alex F. Psaila
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Abstract
The disclosed technology relates to a dispersion comprising LiOH and/or LiOH.H2O particulates dispersed in an organic medium comprising at least one oil and at least one surfactant, the concentration of LiOH and/or LiOH.H2O particulates in the dispersion being greater than 10% by weight, the LiOH and/or LiOH.H2O particulates having a mean particle size in the range up to about 10 microns wherein at least about 99% by weight of the LiOH particulates have a particle size in the range up to about 20 microns. A process for making the dispersion is disclosed. Grease compositions made using the dispersion are disclosed.
Claims44
A dispersion comprising LiOH and/or LiOH.H2O particulates dispersed in an organic medium, the organic medium comprising at least one oil and at least one surfactant, the concentration of LiOH and/or LiOH.H2O particulates in the dispersion being greater than 10% by weight, the LiOH and/or LiOH.H2O particulates having a mean particle size in the range up to about 10 microns wherein at least about 99% by weight of the LiOH and/or LiOH.H2O particulates have a particle size in the range up to about 20 microns.
A process for making a dispersion comprising LiOH particulates, the process comprising:
- (A) forming a slurry comprising LiOH.H2O solids and an organic medium, the organic medium comprising at least one oil and at least one surfactant;
- (B) milling the slurry to form a dispersion comprising LiOH.H2O particulates dispersed in the organic medium;
- and
- (C) dehydrating the dispersion to convert the LiOH.H2O particulates to LiOH particulates.
A process for making a dispersion comprising LiOH.H2O particulates, the process comprising:
- forming a slurry comprising LiOH.H2O solids and an organic medium, the organic medium comprising at least one oil and at least one surfactant;
- and
- milling the slurry to form a dispersion comprising LiOH.H2O particulates dispersed in the organic medium.
A process for making a dispersion comprising LiOH particulates, the process comprising:
- forming a slurry comprising LiOH.H2O solids, mineral oil and polyisobutenyl succinic acid and/or anhydride;
- milling the slurry to form a dispersion comprising LiOH.H2O particulates dispersed in the mineral oil and the polyisobutenyl succinic acid and/or anhydride;
- and
- dehydrating the dispersion to convert the LiOH.H2O particulates to LiOH particulates, the LiOH particulates having a mean particle size in the range up to about 1 micron wherein at least about 70% by weight of the LiOH particulates have a particle size in the range up to about 2 microns, and at least about 99% by weight of the LiOH particulates have a particle size in the range up to about 10 microns.
A process for making grease comprising:
- forming a slurry comprising LiOH.H2O solids and an organic medium, the organic medium comprising at least one oil and at least one surfactant;
- milling the slurry to form a dispersion comprising LiOH.H2O particulates dispersed in the organic medium;
- dehydrating the dispersion to convert the LiOH.H2O particulates to LiOH particulates;
- and
- mixing the dispersion with at least one carboxylic acid and/or ester thereof and at least one oil of lubricating viscosity, and reacting the LiOH particulates with the carboxylic acid and/or ester thereof sufficiently to thicken the oil of lubricating viscosity to a grease composition.
A process for making grease, comprising:
- forming a slurry comprising LiOH.H2O solids and an organic medium, the organic medium comprising at least one oil and at least one surfactant;
- milling the slurry to form a dispersion comprising LiOH.H2O particulates dispersed in the organic medium;
- and
- mixing the dispersion with at least one carboxylic acid and/or ester thereof and at least one oil of lubricating viscosity, and reacting the LiOH.H2O particulates with the carboxylic acid and/or ester thereof sufficiently to thicken the oil of lubricating viscosity to a grease consistency.
A dispersion comprising LiOH particulates dispersed in an organic medium, the organic medium comprising at least one oil and at least one surfactant, the concentration of LiOH particulates in the dispersion being greater than 10% by weight, the LiOH particulates having a mean particle size in the range up to about 10 microns wherein at least about 99% by weight of the LiOH particulates have a particle size in the range up to about 20 microns.
A dispersion comprising LiOH and/or LiOH.H2O particulates dispersed in an organic medium, the organic medium comprising at least one oil and at least one surfactant, the concentration of LiOH and/or LiOH.H2O particulates in the dispersion being greater than 10% by weight, the LiOH and/or LiOH2O particulates having a mean particle size in the range up to about 10 microns wherein at least about 99% by weight of the LiOH and/or LiOH.H2O particulates have a particle size in the range up to about 20 microns, the oil being at least one biodegradable oil, at least one polyalphaolefin, or a mixture of two or more thereof.
Dependencies are inferred from the claim text.