The Displacement Reaction Of High Alkylaluminium Compounds And Apply Of A New Cooling Technology

The present dissertation deals with the displacement reaction of ethylene and high alkyl-aluminum compounds. A set of continuous reaction apparatuses, including ethylene heater, input system of high alkyl-aluminum, spraying reactor, and separation system was designed and applied to the displacement reaction. A new method for effectively measuring the conversion of high alkyl-aluminum and selectivity of a-Olefms was also established.The effects of reaction temperature, pressure, time, input temperature of high alkyl-aluminum compounds, molar ratio of ethylene and high alkyl-aluminum compounds, pressure difference of spraying reactor on the displacement reaction were investigated in detail. The optimum conditions were: reaction temperature=533K, reaction pressure = 1.0MPa, input temperature of high alkyl-aluminum compounds = 433K, mole ratio of ethylene and high alkyl-aluminum compounds = 50, pressure difference of spraying reactor = 0.05-0.10MPa.The products were rapidly cooled via condenser in order to stop the displacement and isomerization reaction as possible. The result showed that the single pass conversion of high alkyl-aluminum was 85.6% and the selectivity of a-Olefins was higher than 99%. The relationship between the isomerization of produced a-Olefms in reaction mixture and store time as well as temperature has been systematically investigated, too.The results demonstrated that spraying reactor and the cooling technology applied to the continuous displacement reaction are feasible. It is possible for amodel of future commercial process.