Synthesis Of Poly Alpha Olefin Used For Synthetic Lube Base Oil

In China, mechanical lubricant is made from natural mineral oil, which has the deficiency of high solidify point and poor performance under low temperature. With increasing demand for the energy saving and environmental protection and rapid development of automobile aerospace industry, synthetic lube oil has been developed very rapidly. Synthesis of poly a-olefin used for synthetic lube base oil catalyzed by AICl3 and AlCl3/TiCl4 in this study. The impact of various kinds of reaction condition such as dosage of catalyst, mole ratio of Al and Ti. reaction time, temperature of reaction on the polymerization were investigated. While the impacts of differentα-olefin material on the feature of polymerizate have been compared, and polymerization reaction kinetics of different catalyst have been studied.The result showed that. AlCl3/TiCl4 as catalyst and a-olefin from coal wax cracking as raw material, optimized condition was that:reaction time was 3h, reaction temperature was 80℃, mole ratio of Al and Ti was 5, catalyst mass ratio was 3%. feature of>280℃fraction of polymerizate was:76.21% of yield,-72℃of solidify point,54.19 mm-2s-1of kinmatic viscosity in 40℃,8.68mm-2s-1 of kinmatic viscosity in 100℃,137 of viscosity index. It showed that coal wax is the appropriate material for base oil of synthetic lubricant. The impact of different materials on polymerizate has been studied, which can provide guidance for the olefin cracking process.Using 1-decene as material and AICl3 as catalyst, producted lube base oil, the optimized polymerization condition was 3% of catalyst mass ratio,140℃of reaction temperature,2h of reaction time. The feature of>280℃fraction of polymerizate was:90.66% of yield,-65℃of solidify point,71.52 mm-2s-1 of kinmatic viscosity over 40℃,11.55mm-2 s-1 of kinmatic viscosity over 100℃,155 of viscosity index. Using 1-decene as material and AlCl/TiCl4 catalyst, producted lube base oil, the optimized polymerization condition was 3h of reaction time 3%,80℃of reaction temperature,5 of mole ratio of Al and Ti,3% of catalyst mass ratio. The feature of>280℃fraction of polymerizate was:96.45% of yield,-72℃of solidify point,72.98 mm-2s-1 of kinmatic viscosity over 40℃,12.21mm-2 s-1 of kinmatic viscosity over 100℃,195 of viscosity index, which could be used to product advanced lube base oil through further refining.Through the investigation of kinetics of polymerization of 1-decene over AlCl3/TiCl4 catalyst, the result showed that, when the polymerization condition was 3% of catalyst mass ratio,5 of mole ratio of Al and Ti. the kinetic energy was 27612.63J/mol, when reaction temperature reached 343K, 353K, 373K, the reaction ratio constant was 0.05318 L·(mol·min)-1.0.06904 L·(mol·min)-1.0.11515 L·(mol·min)-1, respectively. While Through the investigation of kinetics of polymerization of 1-decene over AICl3 catalyst, the result showed that, when the polymerization condition was 3% of catalyst mass ratio, the kinetic energy was 23574.40J/mol, when reaction temperature reached 403K, 413K, 433K, the reaction ratio constant was 0.02452 L·(mol·min)-1,0.02908 L·(mol·min)-1,0.03990 L·(mol·min)-1, respectively.