PROCESS FOR THE PREPARATION OF PROPYLENE AND ETHYLENE FROM FISCHER-TROPSCH DERIVED GAS OIL

摘要

The present invention provides a process for the preparation of propylene and ethylene, the process comprising at least the following steps: (a) providing a Fischer-Tropsch derived gas oil, which Fischer-Tropsch derived gas oil comprises paraffins having from 10 to 35 carbon atoms; (b) mixing the Fischer-Tropsch derived gas oil provided in step (a) with a dilution gas thereby obtaining a mixture; (c) heating the mixture obtained in step (b) thereby obtaining a mixture of diluted gas and evaporated Fischer-Tropsch derived gas oil; and (d) subjecting the mixture obtained in step (c) to a thermal conversion step thereby obtaining a product stream which comprises propylene and ethylene.