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US 7,452,962 B2Granted
Method of removing contaminants from plastic resins
AssigneeHoneywell Federal Manufacturing & Technologies, LLC
InventorsGeorge W. Bohnert, Thomas E. Hand, Gary M. DeLaurentiis
Life of this patent
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Abstract
A method for removing contaminants from synthetic resin material containers using a first organic solvent system and a second carbon dioxide system. The organic solvent is utilized for removing the contaminants from the synthetic resin material and the carbon dioxide is used to separate any residual organic solvent from the synthetic resin material.
Claims35
An apparatus for recycling resin, comprising:
- one or more solvent wash vessels to expose the resin particles to a non-carbon dioxide based solvent, the solvent and the resin particles forming a slurry in the one or more solvent wash vessels, the solvent contacting the resin particles in the one or more solvent wash vessels to substantially remove contaminants on the resin particles;
- a separator to separate the solvent from the resin particles after removal from the one or more solvent wash vessels;
- and
- a solvent removing element including a vessel to expose the resin particles to a carbon dioxide based solvent removing agent to substantially remove any residual solvent remaining on the resin particles after separation, the vessel configured to facilitate the solvent removing agent coming into contact with the resin particles and substantially removing the residual solvent remaining on the resin particles in the vessel.
1 more element
Dependencies are inferred from the claim text.