Abstract: An improved approach for cleaning and recycling materials is based on pressurized solvents including liquid propane, butane, dimethyl ether, and supercritical carbon dioxide. The apporaches are particularly suitable for cleaning sorbent materials. The approach allows for recycling of the sorbent materials, the solvent and the contaminents, typically oils and the like.
Type:
Application
Filed:
September 7, 2001
Publication date:
February 28, 2002
Applicant:
CRI Recycling Service, Inc.
Inventors:
John W. Summerfield, John P. Markiewicz, John M. Moses, Randall L. Barcus
Abstract: An improved approach for cleaning and recycling materials is based on pressurized solvents including liquid propane, butane, dimethyl ether, and supercritical carbon dioxide. The approaches are particularly suitable for cleaning sorbent materials. The approach allows for recycling of the sorbent materials, the solvent and the contaminents, typically oils and the like.
Type:
Grant
Filed:
February 27, 1998
Date of Patent:
November 6, 2001
Assignee:
CRI Recycling Service, Inc.
Inventors:
John W. Summerfield, John P. Markiewicz, John M. Moses, Randall L. Barcus
Abstract: Dielectric heating is used to assist with the cleaning of sorbent materials contaminated with oils and the like and the recovery of the solvent. In particular, a pressurized system is used such that a pressurized solvent is circulated to remove the contaminants from the sorbent materials. The RF radiation is directed into the vessel to vaporize residual solvents associated with the sorbent materials. Solvent is separated from the removed contaminants for reuse. RF radiation can be used to complete the removal of volatile compounds from the reclaimed oil/contaminants.