[특허]Vacuum swing adsorption process with mixed repressurization and provide product depressurization

Vacuum swing adsorption process with mixed repressurization and provide product depressurization 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-053/47
출원번호	US-0241260 (1994-05-10)
발명자 / 주소	Watson Charles F. (Orefield PA) Whitley Roger D. (Allentown PA) Agrawal Rakesh (Emmaus PA) Kumar Ravi (Allentown PA)
출원인 / 주소	Air Products and Chemicals, Inc. (Allentown PA 02)
인용정보	피인용 횟수 : 46 인용 특허 : 0

초록 ▼

A process for separating a feed gas mixture into a more strongly adsorbable component and a less strongly adsorbable component in a plurality of adsorbent beds containing an adsorbent selective for the more strongly adsorbable component with two cocurrent depressurizations, first to provide product and then to provide a purge gas, and using a combination of less strongly adsorbable component and feed gas mixture to repressurize the adsorbent bed. Oxygen product can be recovered from air at high recovery using the process.

대표청구항 ▼

A process for selectively separating a more strongly adsorbable component from a less strongly adsorbable component of a feed gas mixture in a plurality of adsorption beds containing an adsorbent selective for said more strongly adsorbable component, comprising the steps of: (a) introducing said feed gas mixture at elevated pressure containing said more strongly adsorbable component and said less strongly adsorbable component into an inlet of a first adsorption bed containing said adsorbent selective for said more strongly adsorbable component and adsorbing said more strongly adsorbable component on said adsorbent while said less strongly adsorbable component passes through said first bed unadsorbed as a product and as a source of product repressurization gas for a bed of said plurality of adsorption beds undergoing product repressurization of step (f) and continuing until the adsorption front of said more strongly adsorbable component approaches an outlet of said first bed and terminating the introduction of said feed gas mixture; (b) following the termination of the introduction of said feed gas mixture into said first bed, cocurrently depressurizing said first bed to a lower pressure to remove a cocurrent depressurization gas from said first bed and recovering the cocurrent depressurization gas as product; (c) then further cocurrently depressurizing said first bed to a second lower pressure to remove a cocurrent depressurization gas and passing this cocurrent depressurization gas to the outlet of a bed of the plurality of adsorption beds undergoing purge of step (e); (d) countercurrently evacuating said first bed under vacuum conditions to remove said more strongly adsorbable component; (e) countercurrently purging said first bed with said cocurrent depressurization gas from a bed of the plurality of adsorption beds undergoing step (c) to remove additional more strongly adsorbable component from said first bed; (f) partially repressurizing said first bed with said less strongly adsorbable component gas from a bed of the plurality of adsorption beds undergoing the adsorption of step (a); (g) further repressurizing said first bed with elevated pressure feed gas mixture; and (h) performing steps (a) through (g) in each of the plurality of adsorption beds in a phased sequence.

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