PROCESS FOR THE RECOVERY OF AN ETHYLENE AND PROPYLENE CONTAINING STREAM FROM A CRACKED GAS RESULTING FROM HYDROCARBON CRACKING

摘要

Process for the recovery of an ethylene and propylene containing stream from a cracked gas resulting from cracking a hydrocarbon stream, wherein the cracked gas is treated in an absorptive demethanizer with a C4/C5 solvent at a temperature between -10 °C and - 40 °C to free the cracked gas from methane and hydrogen gas, whereafter the remaining stream is treated by distillation in a distillation unit to obtain a C4 /C5 containing stream and the ethylene and propylene containing stream; whereafter the C4/C5 stream is treated with a hydrogen containing stream in a hydrogenation unit, whereafter a part of the hydrogenated C4/C5 stream is cooled to a temperature between -10 °C and -40°C and recycled to the absorptive demethanizer and a part of the hydrogenated C4 /C5 stream is separated.