Hydrocarbon-based fuel compositions which provide improved cetane ratings and a method of making them which comprises admixing a major amount of a petroleum fraction of the diesel boiling range and a small, effective amount of at least one compound having the general formula: ##STR1## where R is H, CH.sub.3 or A; R' is H, CH.sub.3 or C.sub.2 H.sub.5 ; A is ##STR2## or is ##STR3## R" is H or C.sub.1-3 alkyl; and x is 1 or 2.
提供改善
十六烷值的基于碳氢化合物的燃料组成物以及制备它们的方法,其中包括混合主要量的柴油沸程范围内的石油馏分和少量有效量的至少一种具有以下通式的化合物:##STR1## 其中,R为H、CH.sub.3或A;R'为H、CH.sub.3或C.sub.2H.sub.5;A为##STR2## 或为##STR3## R"为H或C.sub.1-3烷基;x为1或2。