RU99109126A - INCREASING LUBRICATING ABILITY OF ADDITIVES TO LIQUID FUEL COMPOSITIONS - Google Patents

Claims (15)

1. The use of a compound comprising one or more aromatic ring systems, at least one of which carries as substituents: (i) one or more hydrocarbyl groups that give this compound oil solubility, (ii) one or more hydroxyl groups, and (III) one or more amide groups,
or an additive composition or concentrate in which this compound is added as an additive to a hydrocarbon average distillate liquid fuel with a sulfur content of 0.2 wt.% or less, calculated on the weight of the fuel, to improve its lubricity. 2. The use according to claim 1, where the compound corresponds to the General formula I

where Ar denotes an aromatic ring system,
B represents a hydrocarbyl group (I),
OR 'denotes a hydroxyl group (II),
-CONR''R '"means an amide group (III) in which each of R" and R "' independently of one another denotes hydrogen or a hydrocarbyl group, a poly (alkyleneoxy) alkyl or poly (alkyleneamino) alkyl group, optionally substituted with one or several heteroatom-containing groups, and
And denotes a group of formula II

where Ar, B, R ', R "and R"' have the meanings indicated above, and each of A 'and A "independently of each other denotes hydrocarbylene groups, and where further
v denotes an integer in the range of 0 - 10,
w denotes an integer in the range of 0 - 3 and
x, y and z each, independently of one another, denotes an integer in the range of 1 - 3.  3. The use according to claim 1 or 2, where the compound includes one aromatic ring system containing one of each of the substituents (II) and (III).  4. The use according to claim 1 or 2, where the compound includes two or more aromatic ring systems, each of which contains one of each substituents (II) and (III).  5. The use according to any one of the preceding claims, wherein the aromatic ring systems or each ring system of the compound is a single six-membered ring.  6. The use according to claim 5, when it depends on claim 3, in which the compound includes a single benzene ring containing (I) one or two aliphatic hydrocarbyl substituents, at least one of which contains at least 8 carbon atoms, ( Ii) one hydroxyl group and (iii) one amide group.  7. The use according to any one of the preceding claims, wherein the amide group can be derived from an alkylenediamine or a polyalkylene polyamine.  8. The use according to claim 7, wherein the compound is an amide obtained by reacting ethane-1,2-diamine or tetraethylenepentamine with an alkyl substituted salicylic acid, and the alkyl substituent or acid substituents contain on average 14-18 carbon atoms. 9. A liquid fuel composition that can be prepared by introducing a small amount of a compound comprising one or more aromatic ring systems, at least one of which contains as substituents: (I) one or more aliphatic hydrocarbyl groups containing 14 to 36 carbon atoms , (Ii) one or more hydroxyl groups, and (iii) one or more amide groups that can be derived from an alkylenediamine or polyalkylenepolyamine,
in a large number of hydrocarbon middle distillate liquid fuels as in the main component, the sulfur content of which is 0.2 wt.% or less, calculated on the weight of the fuel.  10. The composition of liquid fuel, which can be prepared by introducing into the liquid fuel according to claim 9 composition or concentrate of additives, in which the compound according to claim 9 is introduced.  11. A method for improving the lubricity of a hydrocarbon middle distillate liquid fuel, the sulfur content of which is 0.2 wt. % or less, calculated on the weight of the fuel, including the introduction into it of the compound according to claim 9 or the composition or concentrate of the additive according to claim 10. 12. A compound comprising one or more aromatic ring systems, at least one of which contains as substituents: (I) one or more hydrocarbyl groups, which give this compound oil solubility, (II) one or more hydroxyl derivatives of the formula -OR ', in which R 'denotes a hydrocarbyl or a group of the formula

where M denotes an oxygen atom or a group NH, and
n denotes a number in the range of 1 to 50, and
(Iii) one or more amide groups.  13. The composition of the additives in which the compound is introduced according to item 12.  14. The composition of the additive concentrate, which can be prepared by introducing the composition according to claim 13 or the compound of claim 12 and optionally one or more additional additives in a mutually compatible solvent therefor.  15. A liquid fuel composition that can be prepared by introducing a small amount of a compound according to claim 12 to a large amount of liquid hydrocarbon middle distillate fuel, the sulfur content of which is 0.2 wt.% Or less, calculated on the weight of the fuel.