US 12,325,638 B2
Pyrolysis of polymer waste materials
Annelie Stapela, Riehen (CH); and Mathys Johannes Rossouw, Rayton Gauteng (CA)
Assigned to MICROWAVE SOLUTIONS GMBH, Riehen (CH)
Appl. No. 17/440,072
Filed by MICROWAVE SOLUTIONS GMBH, Riehen (CH)
PCT Filed Mar. 19, 2020, PCT No. PCT/EP2020/057602
§ 371(c)(1), (2) Date Sep. 16, 2021,
PCT Pub. No. WO2020/188031, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 00342/19 (CH), filed on Mar. 19, 2019.
Prior Publication US 2022/0184854 A1, Jun. 16, 2022
Int. Cl. C10B 53/07 (2006.01); B01J 6/00 (2006.01); B01J 19/12 (2006.01); B29B 17/04 (2006.01); C01B 33/12 (2006.01); C10B 19/00 (2006.01); C10B 57/02 (2006.01); F23G 7/12 (2006.01); B29K 309/02 (2006.01); B29L 30/00 (2006.01)
CPC C01B 33/126 (2013.01) [B01J 6/008 (2013.01); B01J 19/126 (2013.01); B29B 17/04 (2013.01); C10B 19/00 (2013.01); C10B 53/07 (2013.01); C10B 57/02 (2013.01); F23G 7/12 (2013.01); B29B 2017/0496 (2013.01); B29K 2309/02 (2013.01); B29L 2030/00 (2013.01); F23G 2204/203 (2013.01); F23G 2209/28 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A pyrolysis method for thermal decomposition of a waste material comprising polymer materials and polymer waste materials comprising a plurality of differing material components, using a fast pyrolysis process, comprising:
delivering the waste material to a pyrolytic chamber;
heating the waste material to a decomposition temperature of the polymer waste material by microwave radiation; and
subjecting the polymer waste material to a sequential thermal decomposition of said differing material components by successively applying differing temperatures corresponding to a target decomposition temperature of at least one of the plurality of differing material components,
wherein a target decomposition temperature equals the decomposition temperature of a specific component of the polymer waste material,
wherein the sequential thermal decomposition comprises a first heating step in which the waste material is heated to a first target decomposition temperature of a first material component and a second heating step, which is a subsequent step, for heating the waste material to a second target temperature above said first decomposition temperature of a second material component, and
wherein the pyrolytic chamber comprises subsequent heat zones along a length of the pyrolytic chamber that are each heated to successively higher target decomposition temperatures, and differing exit ports arranged in intervals along a longitudinal axis of the pyrolytic chamber and corresponding to the subsequent heat zones.