Patent ID: 11879102
Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
Field: Other special machines (Mechanical engineering)
Classification: CPC C  B  Y | IPC B  C

Claim 14:
15. Process for the production of ethylene from waste plastics feedstocks comprising the steps in an order of:
(a) pyrolyzing a waste plastic feedstock to obtain a pyrolysis oil, and hydrotreating the pyrolysis oil to obtain a liquid product, which is a hydrocarbon stream A comprising ≥25.0 and ≤70% of n-paraffins, ≥7.5 and ≤40.0 wt % of iso-paraffins; ≤1.0 wt % of olefins; ≥7.5 and ≤15.0 wt % of napthenes; and ≥7.5 and ≤12.5 wt % of aromatics; with regard to the total weight of the hydrocarbon stream A;
(b) optionally providing a hydrocarbon stream B;
(c) supplying a feed C comprising a fraction of the hydrocarbon stream A and optionally a fraction of the hydrocarbon stream B to a thermal cracker furnace comprising cracking coil(s);
(d) performing a thermal cracking operation in the presence of steam to obtain a cracked hydrocarbon stream D;
(e) supplying the cracked hydrocarbon stream D to a separation unit; and
(f) performing a separation operation in the separation unit to obtain a product stream E comprising ethylene;
wherein in step (d):
the coil outlet temperature is ≥800 and ≤870° C.; and
the weight ratio of steam to composition C is >0.3 and <0.8.