Patent ID: 6955707
Filing Date: 2005-10-18
Classification: B01D,B01J,B08B,C23C,H01L,Y02C,Y02P

Abstract:
1. A method for recycling fluorine from a waste stream comprising the steps of: providing a process chamber having an inner surface, said surface having contaminants adhered thereto; providing a stream of fluorine-containing gas from a flowing gas source into the process chamber; contacting the contaminants with the fluorine-containing gas and removing the contaminants from the process chamber inner surface to create a waste stream; directing the waste stream from the process chamber to a purification chamber, said purification chamber comprising an adsorption bed containing an adsorbent; adsorbing contaminants in the waste stream on the adsorbent in the purification chamber; converting the waste stream into a recycled fluorine source stream; and directing the recycled fluorine source stream from the purification chamber to the process chamber as a supplemental fluorine source stream.