초록 ▼

A process for recovering SF.sub.6 from a gas is provided. The process includes the step of contacting a gas stream comprising SF.sub.6 and at least one of N.sub.2, O.sub.2, CO.sub.2, and H.sub.2 O with a membrane in at least one membrane separation unit at conditions effective to obtain a retentate

A process for recovering SF.sub.6 from a gas is provided. The process includes the step of contacting a gas stream comprising SF.sub.6 and at least one of N.sub.2, O.sub.2, CO.sub.2, and H.sub.2 O with a membrane in at least one membrane separation unit at conditions effective to obtain a retentate stream rich in SF.sub.6 and a permeate stream rich in at least one of N.sub.2, O.sub.2, CO.sub.2, and H.sub.2 O. A process for forming solidified Mg metal is also provided. The process includes recovering and/or recycling of SF.sub.6 and/or CO.sub.2.

대표청구항 ▼

[ What is claimed is:] [1.] A process for separating SF.sub.6 from CO.sub.2, said process comprising the steps of:(a) contacting a feed gas stream comprising SF.sub.6 and CO.sub.2 with a first membrane in a first membrane separation unit at conditions effective to obtain a first retentate stream ric

[ What is claimed is:] [1.] A process for separating SF.sub.6 from CO.sub.2, said process comprising the steps of:(a) contacting a feed gas stream comprising SF.sub.6 and CO.sub.2 with a first membrane in a first membrane separation unit at conditions effective to obtain a first retentate stream rich in SF.sub.6 and a first permeate stream rich in CO.sub.2 ;(b) contacting said first retentate stream with a second membrane in a second membrane separation unit at conditions effective to obtain a second retentate stream rich in SF.sub.6 and a second permeate stream depleted in SF.sub.6 ;(c) contacting said second retentate stream with a third membrane in a third membrane separation unit at conditions effective to obtain a third retentate stream rich in SF.sub.6 and a third permeate stream depleted in SF.sub.6 ; and(d) recycling at least a portion of said third permeate stream to said feed gas stream or said first retentate stream, or both.