Minnesota Mining and Manufacturing Company

Cri Recycling Service, Inc.

Cri Recycling Services, Inc.

John W Summerfield

Larry J Krause

John M Moses

John P Markiewicz

Randall L Barcus

Michael Ramsey

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.

Removal of contaminants from materials

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.

Cleaning apparatus with electromagnetic drying

A high performance battery containing an aluminum current collector is described which includes a noncorrosive salt disposed in a matrix, said salt being a bis(perfluoroalkylsulfonyl)imide having a total of at least 3 carbon atoms or a cyclic(perfluoroalkylenedisulfonyl)-imide.

Battery containing bis(perfluoroalkylsulfonyl)imide and cyclic

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Rosemount, MN, United States of America

John W Summerfield