US 12,391,883 B1
Method, process and system for recycling an asphalt-based roofing material
Stephen Barry Thomas, Calgary (CA)
Assigned to Northstar Clean Technologies, Inc., Delta (CA)
Filed by Northstar Clean Technologies Inc., Delta (CA)
Filed on Oct. 16, 2024, as Appl. No. 18/917,150.
Int. Cl. C10C 3/00 (2006.01)
CPC C10C 3/007 (2013.01) 30 Claims
OG exemplary drawing
 
1. A method of separating fiber and filler from an aggregate-free asphalt-based roofing material, the method comprising:
(a) passing a slurry comprising the aggregate-free asphalt-based roofing material and a solvent through a fiber separator to separate fiber from the slurry and produce an asphalt/filler/solvent mixture and a fiber product; and
(b) passing the asphalt/filler/solvent mixture through a filler separator to separate filler from the asphalt/filler/solvent mixture to produce an asphalt/solvent mixture and a filler product;
wherein the aggregate-free asphalt-based roofing material was derived from an asphalt-based roofing material and is substantially free of aggregate.