Patent GB-618245-A (GB)
Title: Sulphurized terpene products and oils containing the same
IPC: C10M135/04
Filed: 1946-03-01
Abstract: Products useful as additions to hydrocarbon oils are obtained by heating the terpene materials specified below with sulphur at about 135-180 DEG  C. and washing the products at about 85-100 DEG  C. with an aqueous solution of an alkali-metal sulphide of about 20-30 per cent concentration.  The terpene starting material may be any of the following, namely, dipentene, terpinolene, mixtures consisting of or containing these, such as an oil of boiling range 178-195 DEG  C. obtained as a by-product in the manufacture of camphor, and a terpene hydrocarbon boiling at 187-188 DEG  C. which is isomeric with dipentene and terpinolene and is obtainable from the oil mentioned above.  The sulphurised products may be washed with aqueous caustic soda before they are washed with alkali sulphide solution, and before or after the latter treatment the products may be freed from unchanged hydrocarbons and terpene monosulphides by distillation under reduced pressure at a temperature which is above 100 DEG  C., but not more than 5 DEG  C. above the sulphurisation temperature. Examples of the process are given.  The products may be used (a) as anti-oxidant additions (effective at about 120-200 DEG  C.) to mineral oils and hydrocarbons, (b) as additions to extreme-pressure lubricants containing chlorinated hydrocarbons, e.g. chlorinated naphthalene or chlorinated paraffin wax, (c) as additions to Diesel fuels, to improve the cetane value, and (d) as corrosion-reducing additions to mineral lubricating oils containing added detergents, e.g. calcium and barium petroleum sulphonates, alkali and alkaline-earth salts of phosphonic and thiophosphonic acids and of acid esters of phosphoric and thiophosphoric acids, and metal salts of naphthenic acid, of substituted phenols and of substituted salicylic acids.  Experimental results illustrating these applications are given, and U.S.A. Specification 1,926,648 is referred to.ALSO:Products useful as additions to hydrocarbon oils are obtained by heating the terpene materials specified below with sulphur at about 135-180 DEG  C. and washing the products at about 85-100 DEG  C. with an aqueous solution of an alkali-metal sulphide of about 20-30 per cent concentration.  The terpene starting material may be any of the following, namely, dipentene, terpinolene, mixtures consisting of or containing these, such as an oil of boiling range 178-195 DEG  C. obtained as a by-product in the manufacture of camphor, and a terpene hydrocarbon boiling at 187-188 DEG  C. which is isomeric with dipentene and terpinolene and is obtainable from the oil mentioned above.  The sulphurized products may be washed with aqueous caustic soda before they are washed with alkali sulphide solution, and before or after the latter treatment the products may be freed from unchanged hydrocarbons and terpene monosulphides by distillation under reduced pressure at a temperature which is above 100 DEG  C. but not more than 5 DEG  C. above the sulphurization temperature.  Examples of the process are given, and U.S.A. Specification 1,926,648 is referred to.