CPC C10G 57/02 (2013.01) [B29B 17/02 (2013.01); B29B 17/04 (2013.01); B29C 48/277 (2019.02); C08J 11/00 (2013.01); C08J 11/06 (2013.01); C08J 11/12 (2013.01); C08J 11/14 (2013.01); C08L 23/06 (2013.01); C10G 1/10 (2013.01); C10G 9/14 (2013.01); C10G 47/00 (2013.01); C10G 50/00 (2013.01); C10G 51/023 (2013.01); C10G 69/12 (2013.01); B29B 2017/0089 (2013.01); B29B 2017/0203 (2013.01); B29B 2017/0496 (2013.01); C08J 2300/30 (2013.01); C08L 2207/20 (2013.01); C10G 2300/1003 (2013.01); C10G 2300/1085 (2013.01); C10G 2300/1096 (2013.01); C10G 2300/201 (2013.01); C10G 2400/20 (2013.01)] | 18 Claims |
1. Process for the production of ethylene-based polymers from waste plastics feedstocks comprising the steps in an order of:
(a) pyrolyzing a waste plastics 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;
(f) performing a separation operation in the separation unit to obtain a product stream E comprising ethylene;
(g) supplying the product stream E to a polymerisation reactor; and
(h) performing a polymerisation reaction in the polymerisation reactor to obtain an ethylene-based polymer;
wherein in step (d):
the coil outlet temperature is ≥800 and ≤870° C.; and
the weight ratio of steam to feed C is >0.3 and <0.8.
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