Patent GB-961572-A (GB)
Title: Dispersions containing lead compounds
Inventor: SIAS ROY C
IPC: C10M159/20
Filed: 1961-09-27
Abstract: A process for preparing dispersions containing lead compounds in a stoichiometric excess of the amount required to neutralize an acidic dispersing agent comprises reacting 5 to 45 parts wt. of lead monoxide with 15 to 60 parts wt. of an oil-soluble dispersing agent comprising an organic sulphonic or carboxylic acid or a phosphorus sulphide-treated olefin, or a salt thereof, in a carrier comprising 40 to 85 parts wt. of a non-volatile substantially neutral mineral or synthetic lubricating oil, in the presence of 25 to 600 parts wt. of a polar solvent comprising water, an alcohol or alkoxyethanol containing up to 4 carbon atoms, or a mixture of two or more thereof, and subsequently removing the polar solvent by heating.  The dispersed lead monoxide may be converted to other lead compounds before, during or after removal of the polar solvent, e.g. by blowing with carbon dioxide or hydrogen sulphide gas or by treatment with hydrogen chloride, oxides of sulphur, sulphuric acid, sulphur, oxides of boron, phosphoric acids and phosphorus sulphides.  Sulphonates specified are petroleum sulphonates, diwaxbenzene sulphonates, diwaxtoluene sulphonates, postdodecylbenzene sulphonates, mono- and poly-wax substituted naphthalene sulphonates, drionylnaphthalene sulphonates, diphenyl ether sulphonates, naphthalene disulphide sulphonates, cycloaliphatic sulphonates, and metal salts thereof. Carboxylic acids specified are aryl-substituted alkane or alkene acids, cyclo-paraffin substituted alkane or alkene acids having at least 15 carbon atoms, alkene fatty acids, e.g. tall oil acids, and metal salts thereof.  Synthetic lubricating oils mentioned are polypropylenes, polyoxyalkylenes, silicate esters and dicarboxylic acid esters.  An auxiliary solvent may be used, e.g. petroleum naphtha, heptane, octane, benzene, toluene, hexane or xylene.  The dispersions may be used as additives for industrial oils, grease additives, gasoline additives, paint driers, wire-drawing compounds, lubricating oil additives, and extreme pressure additives.ALSO:A process for preparing dispersions containing lead compounds in a stoichiometric excess of the amount required to neutralise an acidic dispersing agent comprises reacting 5 to 45 parts by wt. of lead monoxide with 15 to 60 parts by wt. of an oil-soluble dispersing agent comprising an organic sulphonic or carboxylic acid or a phosphorus sulphide-treated olefine or a salt thereof, in a carrier comprising 40 to 85 parts by wt. of a non-volatile substantially neutral mineral or synthetic lubricating oil, in the presence of 25 to 600 parts by wt. of a polar solvent comprising water, an alcohol or an alkoxyethanol having up to 4 carbon atoms, or a mixture thereof, and subsequently removing the polar solvent by heating. The dispersed lead monoxide may be converted to other lead compounds before, during or after removal of the polar solvent, e.g. by blowing with carbon dioxide or hydrogen sulphide gas or by treatment with hydrogen chloride, oxides of sulphur, sulphuric acid, sulphur, oxides of boron, phosphoric acids and phosphorus sulphides.  Sulphonates specified are petroleum sulphonates, diwaxbenzene sulphonates, diwaxtoluene sulphonates, postdodecylbenzene sulphonates, mono- and polywax substituted naphthalene sulphonates, dinonylnaphthalene sulphonates, diphenyl ether sulphonates, naphthalene disulphide sulphonates, cycloaliphatic sulphonates, and metal salts thereof. Carboxylic acids specified are aryl-substituted alkane or alkene acids, cycloparaffin substituted alkane or alkene acids having at least 15 carbon atoms, alkene fatty acids, e.g. tall oil acids, and metal salts thereof. Synthetic lubricating oils mentioned are polypropylenes, polyoxyalkylenes, silicate esters and dicarboxylic acid esters. An auxiliary solvent may be used, e.g. petroleum naphtha, heptane, octane, benzene, toluene, hexane or xylene.  The dispersions may be used as additives for industrial oils, grease additives, gasoline additives, paint driers, wire-drawing compounds, lubricating oil additives, and extreme-pressure additives.ALSO:Lead salt dispersions prepared from 5 to 45 parts wt. lead monoxide, 15 to 60 parts wt. of an oil-soluble dispersing agent comprising an organic sulphonic or carboxylic acid or a phosphorus sulphide-treated olefin, or a salt thereof, and 40 to 85 parts wt. of a carrier comprising a non-volatile substantially neutral mineral or synthetic lubricating oil (see Division C1), in which the lead monoxide is used in a stoichiometric amount greater than that required to neutralize the dispersing agent, are used as paint driers, gasoline additives, grease intermediates, wire-drawing compounds, lubricating oil additives, and extreme-pressure additives. The lead monoxide may, if desired, be converted to other lead compounds, e.g. by blowing with carbon dioxide or hydrogen sulphide gas or by treatment with hydrogen chloride, oxides of sulphur, sulphuric acid, sulphur, oxides of boron, phosphoric acids and phosphorus sulphides. Sulphonates specified include petroleum and synthetic sulphonates, the latter including diphenyl ether sulphonates and naphthalene disulphide sulphonates.  Various classes of carboxylic acids are specified. Synthetic lubricating oils specified are polypropylenes, polyoxyalkylenes, silicate esters and dicarboxylic acid esters.