Patent ID: 8741126

Claim:
A lead-free aviation gasoline (AVGAS) having a Motor Octane Number (MON) comprised between 91 and 92.1 and without any oxygenated compound, the aviation gasoline being prepared by mixing of: 10 to 20% by volume of at least one isopentane cut B1: 62% to 88% by volume of at least one aviation alkylate base B2 essentially consisting of isoparaffins comprising 6 to 9 carbon atoms; and 1 to 22% by volume of at least one base of the aviation reformate type B3 essentially consisting of one of: alkylaromatics and aromatics, the mixture yielding a composition consisting essentially of: from 10 to 22% by volume of isopentane (2-methyl-butane); from 30 to 32% by volume of isooctane (2,2,4-trimethyl-pentane); from 1.8 to 20% by volume of aromatics including 1 to 10% by volume of toluene; and up to 100% by volume of components(s) selected from: C4-C5 isoparaffins other than isopentane, C6-C9 isoparaffins other than isooctane and paraffins, iso-and n-paraffins other than isopentane and isooctane; less than or equal to 500 ppm of sulphur, the sulpher content being measured according to the ASTM D1266 or ASTMD2622 standard; and less than 1000 PPM of at least one additive selected from: antioxidants, anti-icing agents, antistatic additives, corrosion inhibitors/lubricating power enhancer, agents enhancing cold properties, tracer additives, coloring agents, detergents and mixtures thereof; and containing not more than 1% of triptane (2, 2, 3-trimethyl-butane) and not more than 4% of 2, 2, 3-trimethyl-pentane.