US 12,146,108 B2
Method for producing liquid fuel from plastic or polymer waste
Ariel Daniel Crespo Araoz, Santiago (CL); and José Alfredo Duguet Saéz, Santiago (CL)
Assigned to Ecofuels Spa, Santiago (CL)
Appl. No. 18/016,668
Filed by ECOFUELS SPA, Santiago (CL)
PCT Filed Jul. 15, 2020, PCT No. PCT/CL2020/050074
§ 371(c)(1), (2) Date Jan. 17, 2023,
PCT Pub. No. WO2022/011484, PCT Pub. Date Jan. 20, 2022.
Prior Publication US 2024/0034939 A1, Feb. 1, 2024
Int. Cl. C10G 15/08 (2006.01); B01J 6/00 (2006.01); B09B 3/40 (2022.01); C10B 53/07 (2006.01); C10G 11/05 (2006.01)
CPC C10G 15/08 (2013.01) [B01J 6/008 (2013.01); B09B 3/40 (2022.01); C10B 53/07 (2013.01); C10G 11/05 (2013.01); C10G 2300/1003 (2013.01); C10G 2300/4006 (2013.01); C10G 2300/4012 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A process for obtaining liquid fuels from plastic or polymeric material waste with higher thermodynamic efficiency and conversion yield, where the plastic material waste is first collected and crushed, comprising the stages of:
disposing of the crushed plastic or polymeric material in a processing reactor, from the smallest to largest particle size;
vertically arranging the processing reactor in an isolated furnace with a ceramic system of at least 3 centimeters thick and covered with a material based on fiberglass with a thickness between 4 and 10 centimeters;
preheating the insulated oven to a temperature of 200° C. for at least 10 minutes using a heating system based on silicon carbide (SiC) resistors;
starting a temperature increase ramp to keep the reaction constant in a temperature range between 345 to 515° C. through intermittent temperature pulses;
keeping the reactor pressure between 0.4 and 1 MPa, controlled by a manometer and regulated using a drain valve;
starting the thermocracking of the plastic or polymeric material inside the reactor, keeping the temperature constant for a time of between 30 and 50 minutes;
releasing a gaseous fraction through an upper duct of the reactor;
releasing a liquid fraction through the upper duct of the reactor;
transferring a liquid fraction towards a cooling coil to decant into a container containing a highly polar cooling fluid with a higher density than the recovered liquid fuel;
extracting the liquid fuel recovered from the container;
storing recovered liquid fuel in receiving containers; and
recovering the solid fraction decanted in the reactor.