Method, process and system for recycling an asphalt-based roofing material
AssigneeNorthstar Clean Technologies Inc.
InventorStephen Barry Thomas
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a method, process and system for recycling an asphalt-based roofing material. In particular, the method, process and system are capable of removing and recovering an aggregate product, fiber product, filler product and an asphalt product from the asphalt-based roofing material. The aggregate, fiber, filler and and asphalt products each may be reused in a variety of applications.
Claims30
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.
A method of separating filler from an asphalt/filler/solvent mixture, the method comprising:
- (a) passing the asphalt/filler/solvent mixture through a filler separator to separate the filler from the asphalt and solvent;
- and
- (b) removing a filler product from the filler separator;
- wherein the asphalt/filler/solvent mixture was derived from an asphalt-based roofing material and is substantially free of aggregate and fiber.
A system for producing at least an asphalt product from an asphalt-based roofing material containing a plurality of roofing shingles, the system comprising:
- (a) an aggregate removal unit operable to remove substantially all aggregate from the asphalt-based roofing material to produce an aggregate-free asphalt/fiber/filler mixture;
- (b) a fiber separation unit operable to mix the aggregate-free asphalt/fiber/filler mixture with a solvent to produce a slurry and to remove substantially all fiber from the slurry to produce an asphalt/filler/solvent mixture;
- (c) a filler separation unit operable to separate substantially all filler from the asphalt/filler/solvent mixture to produce an asphalt/solvent mixture;
- and
- (d) a solvent separation unit operable to separate substantially all solvent from the asphalt/solvent mixture to produce an asphalt product.
Dependencies are inferred from the claim text.