TH2256A - What is the process for preparing sulfurized alkaline earth alkylfijets that can be used as additives for lubricants? - Google Patents

Abstract

The process for preparing sulfurized alkaline earth metals, particularly calcium alkylphenate, involves neutralizing the sulfurized alkylphenol with an alkaline earth base (e.g., lime) in the presence of oil, glycol, alcohols with boiling points above 150°C, and halide ions. Distillation, filtration, and subsequent carbonation are then performed. The resulting product can be used as a highly alkaline dispersant/cleaning additive for lubricants.

Claims (13)

1. The process for preparing alkylphenates of sulfurized alkaline earth metals under high alkalinity conditions involves neutralizing sulfurized alkylphenols with alkaline earth metal bases in the presence of diluting oil, glycol, and alcohols with boiling points above 150°C. This is followed by filtration after distillation to separate water and glycol, and carbonation of the filter media. Water and glycol are then distilled out, and the sediment is filtered again. Neutralization and carbonation are performed with the presence of halide ions, using the following amounts of reactants: the amount of alcohol corresponds to a molar ratio of alcohol/glycol greater than or equal to 0.4:1; the amount of alkaline earth metal base corresponds to a molar ratio of alkaline earth metal base/alkylphenol ranging from 0.4:1 to 3:1; and the amount of glycol corresponds to the molar ratio of the base. The ratio of alkaline earth metals to glycol ranges from 2.6:1 to 8:1. The amount of halite ions corresponds to the ratio of gram atoms of halite to moles of alkaline earth metal bases, ranging from 0.01:1 to 0.15:1, and the amount of CO2 corresponds to the molar ratio of CO2 to alkaline earth metals, ranging from 0.25:1 to 0.75:1. 2. The process pursuant to claim 1, where the molar ratio of alcohol/glycol is 0.4:1 to 10:1, the molar ratio of alkali earth metal base/alkylphenol is 0.6:1 to 2.5:1, the molar ratio of alkali earth metal base/glycol is 2.7:1 to 6:1, and the ratio of gram atoms of halide/mole of alkali earth metal base is 0.015:1 to 0.09:1. 3. A process under claim 1 or 2 where the alkaline earth metal base is calcium hydroxide. 4. The process under any of the claims in Claims 1 through 3 where alcohols with a boiling point higher than 150°C are alkanols with 6 to 14 carbon atoms or are alkoxyalkanols. 5. The process pursuant to claim paragraph 4 where the alcohol is ethylhexanol or 2-butoxyethanol. 6. The process under any of the claims of claims 1 through 5 where the halide ion is a chloride ion. 7. The process pursuant to claim point 6, in which chloride ions are added in the form of CaCl2, ZnCl2, or NH4Cl. 8. The process under any of the claims in Claims 1 through 7 where neutralization is achieved with an amine contained in an amount corresponding to a molar ratio of amine/alkaline earth metal base up to 0.2:1. 9. The process under claim number 8 where the amine is ethylenediamine or tris-(3-oxa-6-aminohexyl)amine. 10. The process under any of the claims of Claims 1 through 9 in which neutralization is achieved with the presence of acetic acid in an amount consistent with an acetic acid/alkaline earth base molar ratio up to 0.2:1. 11. The process pursuant to claim 10 where the molar ratio of acetic acid/alkaline earth metal base reaches 0.1:1. 12. The process under any of the claims of Claims 1 through 11 in which sulfurized alkylphenol is prepared herein in a neutralization mixture of alkylphenol and sulfur. 13. Lubricating oils containing sulfurized alkylphenates of alkaline earth metals prepared by any of the processes outlined in Claims 1 through 12 (Claims 13).