Preparation of overbased magnesium sulfonates

Details Preparation of overbased magnesium sulfonates Preparation of overbased magnesium sulfonates

C - Chemistry, Metallurgy

10

M

253/25, 134/44,

C10M 159/24 (2006.01) F02B 3/06 (2006.01)

Patent

CA 1092341

PREPARATION OF OVERBASED MAGNESIUM SULFONATES Abstract of the Disclosure Process of preparation of fluid overbased, particularly highly overbased, magnesium-containing colloidal dispersions wherein a partial mixture is formed of an oil-soluble sulfonic acid as such or admixed with an oil-soluble aliphatic hydro- carbon monocarboxylic acid, a volatile aliphatic or aromatic or chlorinated hydrocarbon solvent, a special grade or readily reactive form of magnesium oxide for neutralization and over- basing purposes, and an alcohol, carbonating the mixture with a controlled limited amount of carbon dioxide, in the presence of an added activator, adding a nonvolatile diluent oil, sta- bilizing the colloidal dispersion, removing undesired sediment and then heating to distill off the volatile materials. The final overbased compositions have excellent utility as lubri- cating oils for use in diesel engines and internal combustion engines, and they possess, among other properties, the corro- sion inhibiting and antioxidant properties, the ability to re- duce engine wear and to inhibit formation of undesirable and harmful deposits on engine parts. In the process, a stabilized post-reaction composition is produced, as indicated above, util- izing a limited amount, which is substantially less than the stoichiometric amount, of carbon dioxide per mole of over-basing magnesium present.

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