Mixed carboxylate overbased gels
AssigneeThe Lubrizol Corporation
InventorsJames N. Vinci, William R. Sweet
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Abstract
Gelled overbased materials are prepared by mixing an overbased composition of a metal salt of an organic acid material containing at least 8 carbon atoms, a metal salt of an organic acid material containing fewer than 6 carbon atoms, and a metal carbonate in an oleophilic medium, with an alcohol or an alcohol-water mixture, and heating the mixture.
Claims71
A process for preparing a gelled overbased material, comprising the steps of:
- (a) preparing a mixture of (i) a fluid carbonated overbased material in an oleophilic medium, which mixture contains a metal salt of at least one organic acid material containing at least 8 carbon atoms and a metal salt of at least one organic acid material containing fewer than 6 carbon atoms, and (ii) an alcohol or an alcohol-water mixture;
- and
- (b) heating the mixture of (a).
The process of claim i further comprising the steps of:
- (d) admixing the material obtained from step (b) with a replacement medium;
- and
- (c) removing the oleophilic medium.
A process for preparing an overbased composition, comprising the steps of:
- (a) combining a source of an acid of at least 8 carbon atoms, a polar oleophilic medium, and a stoichiometric excess of a metal base;
- and
- (b) carbonating the mixture.
A process for preparing an overbased composition, comprising the steps of:
- (a) combining a source of an acid of at least 8 carbon atoms, a polar oleophilic medium, and a stoichiometric excess of a metal base;
- and (b) carbonating the mixture at about 70.degree. to about 95.degree. C.
Dependencies are inferred from the claim text.