| abstract |
An improved process for the production of borated alkaline earth metal toluene sulfonate. A process for producing a borated alkaline earth metal alkyltoluenesulfonate comprising the following steps: (A) (i) an oil-soluble alkyltoluenesulfonic acid, or an oil-soluble alkaline earth metal alkyltoluenesulfonate salt, or a mixture thereof, (ii) an alkaline earth metal source, (iii) a hydrocarbon solvent and a low molecular weight alcohol Reacting a boron source present in a mixture consisting of: and (iv) an overbased acid, at least one of which is boric acid, (B) The reaction product of step (a) is carbonized from the reaction product by heating to a temperature higher than any distillation temperature of the hydrocarbon solvent, low molecular weight alcohol and water produced in step (a). Distilling off hydrogen solvent, low molecular weight alcohol and product water; However, no external addition of water is performed in the process steps. [Selection figure] None |