Antioxidants for liquid hydrocarbons

Details Antioxidants for liquid hydrocarbons Antioxidants for liquid hydrocarbons

1990-10-22

1991-09-10

Medley, Margaret B.

Fuel and related compositions

Liquid fuels

Heterocyclic carbon compound containing a hetero ring having...

44415, 44425, 544145, 544159, 544173, C10L 500

Patent

active

050470698

ABSTRACT:
An antioxidant for liquid hydrocarbons such as fuels has the structure ##STR1## wherein X is N or S; R is H or a C.sub.1 to C.sub.5 alkyl moiety; R.sup.1 and R.sup.2 are each independently C.sub.5 to C.sub.18 alkyl or cycloalkyl moieties (which may optionally contain a hetero atom such as oxygen), only one of R.sup.1 and R.sup.2 being present if X is S, or may be combined to form a 5 or preferably 6 membered ring; each R.sup.6 is independently the residue of a C.sub.1 to C.sub.5 aldehyde; and R.sup.7 is the residue of a polyamine of the formula ##STR2## wherein R.sup.3 is a C.sub.8 to C.sub.50 alkyl moiety (which may optionally contain one or more ether linkages); R.sup.4 and R.sup.5 are each independently C.sub.2 to C.sub.6 alkylene moieties; a is 0 or 1; and m is at least 3.

REFERENCES:
patent: 2684293 (1954-07-01), Hill
patent: 3269810 (1966-08-01), Chamot
patent: 3649229 (1972-03-01), Otto
patent: 3877889 (1975-04-01), Dix
patent: 3920415 (1975-11-01), Reusser et al.
patent: 4006089 (1977-02-01), Chibnik
patent: 4166726 (1979-09-01), Harle
patent: 4501595 (1985-02-01), Sung et al.
patent: 4553979 (1985-11-01), Hanlon et al.

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