US 11,879,102 B2
Process for the preparation of polyethylenes from waste plastic feedstocks
Anthoni Van Zijl, Geleen (NL); Nicolas Goyheneix, Geleen (NL); Lara Galan-Sanchez, Geleen (NL); Christoph Roosen, Geleen (NL); Johan Pastwa, Geleen (NL); and Safa Farajzadeh Bibalan, Geleen (NL)
Assigned to SABIC GLOBAL TECHNOLOGIES B.V., Bergen Op Zoom (NL)
Appl. No. 17/424,701
Filed by SABIC GLOBAL TECHNOLOGIES B.V., Bergen Op Zoom (NL)
PCT Filed Jan. 24, 2020, PCT No. PCT/EP2020/051729
§ 371(c)(1), (2) Date Jul. 21, 2021,
PCT Pub. No. WO2020/152319, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 19153458 (EP), filed on Jan. 24, 2019; application No. 19153897 (EP), filed on Jan. 28, 2019; application No. 19157064 (EP), filed on Feb. 14, 2019; application No. 19157324 (EP), filed on Feb. 14, 2019; and application No. 19157898 (EP), filed on Feb. 19, 2019.
Prior Publication US 2022/0135889 A1, May 5, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C10G 57/02 (2006.01); C08J 11/14 (2006.01); C08L 23/06 (2006.01); B29B 17/04 (2006.01); C08J 11/00 (2006.01); C10G 9/14 (2006.01); C10G 50/00 (2006.01); C10G 69/12 (2006.01); C10G 1/10 (2006.01); C10G 47/00 (2006.01); B29C 48/275 (2019.01); B29B 17/02 (2006.01); C08J 11/06 (2006.01); C10G 51/02 (2006.01); C08J 11/12 (2006.01); B29B 17/00 (2006.01)
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.