Patent GB-835570-A (GB)
Title: Phosphorus-and sulphur-containing complex metal salts of oxidized hydrocarbons and oil compositions thereof
IPC: C10M159/12
Filed: 1956-12-06
Abstract: Mineral lubricating oils contain a minor amount of an oil-soluble phosphorus-, sulphur- and metal-containing oxidized hydrocarbon reaction product, prepared by (1) forming a mixture of (a) a hydrocarbon of molecular weight from about 200 to about 1000 selected from aliphatic hydrocarbons and aromatic hydrocarbons having at least one nuclear hydrogen atom substituted by an aliphatic radical, to give at least 8 aliphatic carbons per molecule, and (b) from 0.5 to 25%, based on the hydrocarbon, of a Group I or II metal oxide or hydroxide; (2) contacting the mixture with a gas containing free oxygen at 125-325 DEG  C.; (3) continuing the oxidation until 0.05 to 3.0% by weight of metal has been incorporated into the oxidized hydrocarbon; (4) reacting the product with 5-20% by weight (based on the hydrocarbon charged) of a phosphorus sulphide at 75-150 DEG  C.; (5) adding about 2 to about 25% weight (based on the hydrocarbon charged) of a Group I or II metal oxide, hydroxide, carbonate or chloride, and also water, at a temperature below the boiling point of water; (6) substantially completely dehydrating the reaction mixture; and (7) filtering off insolubles.  Preferably the hydrocarbon has a molecular weight above 600, and may be a petroleum oil or petroleum oil fraction such as petrolatums and waxes; refined oils, such as "Bright Stocks" are preferred.  The phosphorus sulphide used may be P2S5, P4S7 or P4S3, or P4S7 or P4S3 with 10-25% of sulphur.  Examples describe the preparation of many such oil-soluble derivatives and oil compositions containing them. Generally the compositions contain from about 1 to about 10% by weight of the derivatives, and may also contain other additives, such as zinc dihexyl dithiophosphate, sulphurized or phosphosulphurized pinene, pour point depressants, viscosity index improvers, defoamants and rust preventives.  The oils have improved anti-oxidant and detergent properties.  Specifications 645,267 and 806,915 are referred to.ALSO:An oil-soluble phosphorus-, sulphur- and metal-containing oxidized hydrocarbon reaction product is produced by (1) forming a mixture of (a) a hydrocarbon of molecular weight from about 200 to about 1000 selected from aliphatic hydrocarbons and aromatic hydrocarbons having at least one nuclear hydrogen substituted by an aliphatic radical, to give at least 8 aliphatic carbons per molecule, and (b) from 0.5 to 25%, based on the hydrocarbon, of a Group I or II metal oxide or hydroxide; (2) contacting the mixture with a gas containing free oxygen at 125-325 DEG  C., (3) continuing the oxidation until 0.05 to 3.0% by weight of metal has been incorporated into the oxidized hydrocarbon, (4) reacting the product with 5-20% by weight (based on the hydrocarbon charged) of a phosphorus sulphide at 75-150 DEG  C., (5) adding about 2 to about 25% by weight (based on the hydrocarbon charged) of a Group I or II metal oxide, hydroxide, carbonate or chloride, and also water, at a temperature below the boiling point of water, (6) substantially completely dehydrating the reaction mixture, and (7) filtering off insolubles.  Preferably the hydrocarbon has a molecular weight above 600, and may be a petroleum oil or petroleum oil fraction such as petrolatums and waxes; refined oils such as "Bright Stocks" are particularly preferred.  The phosphorus sulphide used may be P2S5, P4S7 or P4S3, or P4S7 or P4S3 with 10-25% of sulphur. Examples describe the preparation of oil-soluble derivatives containing Ca, Ba, Zn, Ca and Ba, Ca and Zn, Ca and Na, Ca and Zn and Na.  Specifications 645,267 and 806,915 are referred to.