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1. WO1985000118 - METHOD AND APPARATUS FOR SEPARATING MIXED GAS

Publication Number WO/1985/000118
Publication Date 17.01.1985
International Application No. PCT/JP1984/000319
International Filing Date 19.06.1984
IPC
B01D 53/047 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
02by adsorption, e.g. preparative gas chromatography
04with stationary adsorbents
047Pressure swing adsorption
CPC
B01D 2253/102
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2253Adsorbents used in seperation treatment of gases and vapours
10Inorganic adsorbents
102Carbon
B01D 2253/108
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2253Adsorbents used in seperation treatment of gases and vapours
10Inorganic adsorbents
106Silica or silicates
108Zeolites
B01D 2256/12
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2256Main component in the product gas stream after treatment
12Oxygen
B01D 2256/18
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2256Main component in the product gas stream after treatment
18Noble gases
B01D 2257/102
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2257Components to be removed
10Single element gases other than halogens
102Nitrogen
B01D 2259/40001
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2259Type of treatment
40Further details for adsorption processes and devices
40001Methods relating to additional, e.g. intermediate, treatment of process gas
Applicants
  • HITACHI, LTD. [JP]/[JP] (AllExceptUS)
  • OHTANI, Misayo (legal representative of OHTANI, Ko [JP]/[JP] (UsOnly)
  • TOMOMURA, Masaomi [JP]/[JP] (UsOnly)
  • NOGITA, Shunsuke [JP]/[JP] (UsOnly)
  • SOMEYA, Kazuo [JP]/[JP] (UsOnly)
Inventors
  • TOMOMURA, Masaomi
  • NOGITA, Shunsuke
  • SOMEYA, Kazuo
  • OHTANI, Kohji (deceased)
Agents
  • TAKAHASHI, Akio
Priority Data
58/11591329.06.1983JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD AND APPARATUS FOR SEPARATING MIXED GAS
(FR) PROCEDE ET DISPOSITIF DE SEPARATION DE GAZ MELANGES
Abstract
(EN)
A mixed-gas separation method in which a product gas is collected from a raw-material gas by a pressure-difference adsorption technique in which a pressurized adsorption operation and a reduced-pressure desorption operation are successively repeated. In order to reduce the length of an adsorption zone in each of adsorption towers (A1, A2, B1, B2, ...), and reduce adsorption zone turbulence, pressure-difference adsorption units (UA, UB, UC, ..., UX) constituting a plurality of stages are employed, and a refined gas or a concentrated refined gas obtained in the previous-stage pressure-difference adsorption units (UA, UB, UC, ...) is directly introduced (2A, 2B, ...) to subsequent-stage pressure-difference adsorption units (UB, UC, ..., UX), respectively, and separated. The waste gas produced in the reduced-pressure desorption operation in the subsequent-stage pressure-difference adsorption units (UB, UC, ...UX) is introduced (3B, 5A, 3C, 5B, ...) to pressurize the adsorption towers (A1, A2, B1, B2, ...) of the previous-stage pressure-difference adsorption units (UA, UB, UC, ...). The invention is particularly suitable for collecting argon and oxygen.
(FR)
Procédé de séparation de gaz mélangés dans lequel un gaz produit est extrait d'un gaz de matériau brut grâce à une technique d'adsorption par différence de pression, dans laquelle on répète successivement une opération d'adsorption sous pression et une opération de désorption à pression réduite. Afin de réduire la longueur d'une zone d'adsorption dans chacune des tours d'adsorption (A1, A2, B1, B2, ...), et de réduire les turbulences dans les zones d'adsorption, on utilise des unités d'adsorption à différence de pression (UA, UB, UC, ..., UX) constituant une pluralité d'étages, et un gaz raffiné ou un gaz raffiné concentré obtenu dans les unités d'adsorption à différence de pression de l'étage précédent (UA, UB, UC, ...) est introduit directement (2A, 2B, ...) dans des unités d'adsorption à différence de pression de l'étage successif (UB, UC, ..., UX), respectivement, et séparé. Le gaz perdu produit pendant l'opération de désorption à pression réduite dans les unités d'adsorption à différence de pression de l'étage successif (UB, UC, ...UX) est introduit (3B, 5A, 3C, 5B, ...) pour mettre sous pression les tours d'adsorption (A1, A2, B1, B2, ...) des unités d'adsorption à différence de pression de l'étage précédent (UA, UB, UC, ...). Cette invention convient particulièrement à l'extraction de l'argon et de l'oxygène.
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