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US 11,492,455 B1Granted
Method, process and system for recycling an asphalt-based roofing material
AssigneeNorthstar Clean Technologies Inc.
InventorsTerry Alan Charles, Gord Johnson, Barry Diebold
Life of this patent
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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 and an asphalt product from the asphalt-based roofing material. The aggregate, fiber and asphalt products each may be reused in a variety of applications.
Claims27
A method for removing aggregate from an asphalt-based roofing material comprising:
- (a) contacting the asphalt-based roofing material with at least one pressurized stream of fluid to mechanically separate the aggregate from the asphalt-based roofing material;
- and
- (b) agitating or pulsing the separated aggregate, asphalt-based roofing material and fluid in a separation tank to remove the separated aggregate from the asphalt-based roofing material and fluid by density.
A method for separating fiber from an aggregate-free asphalt-based roofing material, the method comprising:
- (a) mixing the aggregate-free asphalt-based roofing material with a solvent to form a slurry;
- and
- (b) machine pressing or filter pressing the slurry in a fiber separator to separate fiber from the slurry and produce an asphalt/solvent mixture and a fiber product,
- wherein the aggregate-free asphalt-based roofing material was obtained by contacting an asphalt-based roofing material with at least one pressurized stream of fluid to remove substantially all aggregate from the asphalt-based roofing material.
1 more element
Dependencies are inferred from the claim text.