Patent GB-941550-A (GB)
Title: Oxyalkylated carbonated basic sulfonates and lubricating oil compositions containingthe same
IPC: C10M159/24
Filed: 1959-12-21
Abstract: Oxyalkylated carbonated basic alkaline earth metal sulphonates are prepared from a basic alkaline earth metal sulphonate, obtained by reacting an alkaline earth metal oxide or hydroxide with a neutral sulphonate of the formula (R SO3)2M or [(R)aASO 3]2M wherein R is a cyclic or straight or branched chain, saturated or unsaturated hydrocarbon radical having a molecular weight from 150-800, A is an aromatic radical, a is an integer from 1 to 4 and M is an alkaline earth metal, by reacting the basic sulphonate firstly with an alkylene oxide having the oxygen atom attached to adjacent carbon atoms and then with carbon dioxide, the alkaline earth metal being present in the basic sulphonate in an amount from 1-3 mols in excess of that in the neutral sulphonate, the oxyalkylation being effected with from 0.1 to 1 mol of alkylene oxide per equivalent of excess metal and the carbonation being effected with at least 0.1 mol of CO2 per equivalent of excess metal.  Specified neutral sulphonates include the barium and calcium salts of white oil - alkylated and di - polypropylene - alkylated benzene sulphonic acids, mahogany sulphonic acid and lauryl and triacontyl sulphonic acids.  Other values of R referred to include dodecyl and wax radicals while A may also represent a naphthalene, anthracene or diphenyl radical. Specified alkylene oxides are ethylene, propylene, butylene, amylene and octylene oxides.  Examples describe the treatment of (1) a basic barium petroleum sulphonate and (2) a basic calcium petroleum sulphonate, dissolved in a naphthenic base lubricating oil, with ethylene oxide and then with CO2 at 300 DEG F.  The products are used as detergents in lubricants (see Division C5).ALSO:Lubricating oil compositions comprise a lubricating oil and 0.5 to 10% by weight of an oxyalkylated carbonated basic alkaline earth metal sulphonate prepared from a basic sulphonate obtained by reacting an alkaline earth metal oxide or hydroxide with a neutral sulphonate of the formula (RSO3)2M or [(R)aASO3]2M wherein R is a cyclic or straight or branched chain saturated or unsaturated hydrocarbon radical having a molecular weight of from 150 to 800, A is an aromatic radical, a is an integer from 1 to 4 and M is an alkaline earth metal, by reacting the basic sulphonate with an alkylene oxide having the oxygen atom attached to adjacent carbon atoms and then with carbon dioxide, the alkaline earth metal being present in the basic sulphonate in an amount of 1 to 3 mols. in excess of that in the neutral sulphonate, the oxyalkylation being effected with from 0.1 to 1 mol. of alkylene oxide and the carbonation being effected with at least 0.1 mol. of CO2, per equivalent of excess metal content.  Specified neutral sulphonates include the calcium and barium salts of white oil-alkylated and di-polypropylene-alkylate benzene sulphonic acids, lauryl and triaconityl sulphonic acids and mahogany acids.  The alkylene oxide is suitably ethylene or propylene oxide but others are mentioned.  The lubricating base oils may be mineral oils or synthetic oils, for example, alkylene polymers, alkylene oxide polymers whose terminal hydroxyl groups may be modified by esterification or etherification, dicarboxylic acid esters, esters of phosphorus acids, aromatic type base oils and silicon polymers, and numerous examples of these synthetic oils are provided, including indane derivatives, bis-(phenoxyphenyl) nonane, bis(carbethoxydecyl)-benzene, 2-ethylhexyl phenyl decanoate and alkyl diphenyl ethers.  Examples describe the preparation of oxyethylated carbonated basic barium and calcium petroleum sulphonates as concentrates in a naphthenic base lube oil and these are compounded in a paraffinic base oil with a zinc butyl hexyl dithio phosphate and a modified alkyl methacrylate copolymer as a V.I. agent.