tert-Butyl Ethers of Renewable Diols as Oxygenated Additives for Motor Gasoline. Part I: Glycerol and Propylene Glycol Ethers

Abstract The study investigates tert- butoxy alkanols (otherwise defined as polyol butyl ethers) that have vicinal and hydroxy groups in their molecules from the perspective of usability oxygenated additives for motor gasoline. A series propylene glycol mono- ether (PTBE) glycerol di- (di-GTBE) samples were prepared: PTBE by direct acid-catalytic alkylation diols with butanol, di-GTBE epichlorohydrin. Adding to base gasoline was found improve its antiknock performance: average blending research octane number ratios (bRON/bMON) equaled 120/111 124/104 di-GTBE, respectively. Furthermore, effects on properties ethanol-blended characterized. Finally, describes effect cloud point depression (low-temperature phase stabilization) demonstrates a positive synergistic adding ethers mixed ethanol.