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특허 상세정보

Process for recovering helium from a gas stream

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F25J-003/00   
미국특허분류(USC) 62/17 ; 55/16 ; 55/68 ; 62/20
출원번호 US-0881250 (1992-05-11)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 52  인용 특허 : 0
초록

A subquality nitrogen-rich natural gas stream containing more than 0.1 mol % helium is countercurrently extracted with a lean physical solvent to produce a rich solvent bottoms stream which is flashed twice to produce a methane-rich gas product and a nitrogen-helium product which is fed to at least one membrane unit. A reject nitrogen stream and a crude helium stream are discharged from this unit. The crude helium stream is either compressed to a pressure within the range of 200 to 3,000 psia for sale or is compressed to no more than 1,000 psia and fed t...

대표
청구항

In a process for separating C1+hydrocarbons and nitrogen from a nitrogen-rich gas stream containing at least 3 mol % of said nitrogen and at least 0.1 mol % helium, comprising the following steps: A. contacting said nitrogen-rich gas stream with a lean oil selected from the group consisting of paraffinic, naphthenic, and aromatic hydrocarbons and mixtures thereof having molecular weights ranging between about 70 and 250, at temperatures no lower than -40°F. and pressures ranging between 70 and 1,320 psia to produce a nitrogen enriched stream containing s...

이 특허를 인용한 특허 피인용횟수: 52

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