PROCESS AND PLANT FOR PURIFICATION OF A GAS STREAM CONTAINING ACROLEIN

摘要

28ABSTRACTPROCESS AND PLANT FOR PURIFICATIONOF A GAS STREAM CONTAINING ACROLEINIn a first stage a feed gas stream containing5 acrolein originating for example from the gas-phaseoxidation of propylene to acrolein, is fractionatedinto a gaseous effluent and a liquid stream in acooling column operating such that the temperature ofthe liquid stream at the bottom of the column is lower10 than or equal to the condensation temperature of thefeed gas stream, the difference in temperature notexceeding [err] and, in a second stage, the gaseouseffluent is condensed at a temperature that is lowerthan [err] to give a liquid fraction and a purified15 gaseous fraction.FIGURE 1