Solution process for preparing metal salt esters of hydrocarbyl substituted succinic acid or anhydride and alkanols

Abstract From the Canadian patent

A solution process is disclosed for preparing a solubilized metal salt ester by reacting an ester compound such, as 2,2'-thiodiethyl-bis (octadecenyl) succinate ester with a, metal carboxylate, such as calcium acetate in the presence of a, mixture of (a) a first co-solvent and/or third co-solvent such, as toluene and/or dodecylbenzene respectively and (b) a second, co-solvent such as methanol to form the metal salt ester, product and an effluent mixture of an acid such as acetic acid, optional co-solvent first and second co-solvent, followed by, the optional addition of a third co-solvent and vacuum dis-, tilling the resulting mixture to remove the effluent mixture to produce a solution of …