Patent GB-744779-A (GB)
Title: Improvements in or relating to preparation of phosphorus sulfide-hydrocarbon reaction products
Inventor: WATSON ROGER W
IPC: C10M159/12
Filed: 1953-04-13
Abstract: A non-gaseous hydrocarbon is reacted with 1 to 50 per cent of a phosphorus sulphide at 200 DEG  to 600 DEG  F. and the product, which may be previously diluted with hydrocarbon oil, is hydrolysed at 220 DEG  to 500 DEG  F. and then contacted with an alkaline mineral adsorbent at 100 DEG  to 500 DEG  F. until substantially all of the inorganic phosphorus acids have been removed.  The mixture is filtered and the filtrate may then be neutralized, in particular with barium hydroxide.  Neutralization may optionally be effected prior to hydrolysis.  In a modification, precipitation of inorganic phosphorus acids and neutralization are effected in one step by steaming at 220 DEG  to 300 DEG  F. with at least a stoichiometric amount of barium hydroxide and a barium containing additive is obtained. Hydrocarbons specified are polymers of propylene, butylene or amylene, polymers of hydrocarbons derived from vapour phase cracking of paraffin wax in presence of aluminium chloride or of gasoline in presence of sulphuric acid or fuller's earth, and voltolized hydrocarbons.  The alkaline mineral adsorbent may be Attapalgus clay, Floridin, fuller's earth, bentonite, magnesite, bauxite, calcium oxide, carbonate or hydroxide, barium oxide or hydroxide or magnesium oxide.  The products are useful as lubricating oil additives.ALSO:A non-gaseous hydrocarbon is reacted with 1 to 50 per cent of a phosphorus sulphide at 200 DEG  to 600 DEG  F. and the product, which may be previously diluted with hydrocarbon oil, is hydrolysed at 220 DEG  to 500 DEG F. and then contacted with an alkaline mineral adsorbent at 100 DEG to 500 DEG  F. until substantially all of the inorganic phosphorus acids have been removed.  The mixture is filtered and may then be neutralized with an alkaline reagent, in particular barium hydroxide. Neutralization may optionally be effected prior to hydrolysis.  In a modification, precipitation of inorganic phosphorus acids and neutralization are effected in one step by steaming at 220 DEG  to 300 DEG  F. with at least a stoichiometric amount of barium hydroxide and a barium containing derivative is obtained.  Hydrocarbons specified are paraffinic hydrocarbons such as bright stock residuums, lubricating oil distillates, petrolatums, paraffin waxes, condensation products of hydrocarbons with aromatic hydrocarbons, olefins such as cetene and melene, olefins obtained by dehydrogenation of paraffins or dehalogenation of alkyl halides (e.g. halogenated paraffin waxes), benzene, naphthalene, toluene, xylene, diphenyl and alkylated aromatic hydrocarbons.  The alkaline mineral adsorbent may be Attapulgus clay, Floridin, fuller's earth, bentonite, magnesite, bauxite, calcium oxide, carbonate or hydroxide, barium oxide or hydroxide or magnesium oxide.  The products of the invention are useful as lubricating oil additives.ALSO:Lubricating oil additives are obtained by reacting a non-gaseous hydrocarbon with 1 to 50 per cent of a phosphorus sulphide at 200 DEG  to 600 DEG F. and the product, which may be previously diluted with hydrocarbon oil, is hydrolyzed at 220 DEG  to 500 DEG F. and then contacted with an alkaline mineral absorbent at 100 DEG  to 500 DEG F. until substantially all of the inorganic phosphorus acids have been removed.  The mixture is filtered and may then be neutralized, e.g. with barium hydroxide.  Neutralization may optionally be effected prior to hydrolysis.  In a modification, precipitation of inorganic phosphorus acids and neutralization are effected in one step by steam at 220 DEG  to 300 DEG F. with at least a stoichiometric amount of barium hydroxide and barium containing derivative is obtained. Various hydrocarbons are specified (see also Groups IV(a) and IV(b)) including bright stock residuums, lubricating oil distillates, petrolatums and paraffin waxes. Lubricating compositions comprising hydrocarbon oil, such as mineral oil, together with the additives, reduce valve wear in diesel engines particularly when using fuels having high sulphur content.