EP0129444A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Methods for obtaining high-purity carbon monoxide
Assignee: JFE Steel Corp
•
Filing: 1984-06-19
•
Granted: —
•
Expires: 2004-06-19
Abstract
Abstract A process for separating carbon monoxide from a feed gas comprising C0 2 , CO and less adsorbable component than CO through PSA by using at least two adsorption columns in two stage adsorption operation which comprises a first adsorption stage for removing C0 2 from said feed gas and a second adsorption stage for separating CO from gaseous mixture withdrawn from the first adsorption stage: (1) the first adsorption stage comprising a pressure swing adsorption repeating adsorption and desorption, and (2) the second adsorption stage comprising: (i) pressurization by the first stage product gas, (ii) adsorption, (iii) depressurization, (iv) purge by product gas, (v) evacuation for recovering product gas, and (vi) pressurization by gas withdrawn in other column, periodically switching the flow between or among said columns so as to repeat the above steps in the columns, and a process for separating carbon monoxide from a feed gas comprising carbon monoxide and less adsorbable component than CO through pressure swing adsorption by using at least two adsorption columns containing an adsorbent exhibiting selective adsorb property to carbon monoxide which comprises: (i) pressurization by feed gas, (ii) adsorption, (iii) depressurization, (iv) purge by product gas, (v) evacuation for recovering product gas, and (vi) pressurization by gas withdrawn in other column, periodically switching the flow between or among said columns so as to repeat the above steps in the columns are disclosed.
Inventors
- 👤 Toshikazu C/O Technical Laboratories Of Sakuraya
- 👤 Tetsuya C/O Technical Laboratories Of Fujii
- 👤 Shigeo C/O Chuo Laboratories Of Matsui
- 👤 Shigeki C/O Chuo Laboratories Of Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 07:47
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/047; B01D53/0476; C; C01; C01B; C01B32/00; C01B32/40; C10; C10K; C10K1/00; C10K1/32; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/106; B01D2253/108; B01D2256/00; B01D2256/10; B01D2256/20; B01D2257/00; B01D2257/10; B01D2257/102; B01D2257/104; B01D2257/108; B01D2257/50; B01D2257/502; B01D2257/504; B01D2259/00; B01D2259/40; B01D2259/40001; B01D2259/40011; B01D2259/40013; B01D2259/40015; B01D2259/40028; B01D2259/4003; B01D2259/40035; B01D2259/40037; B01D2259/40058; B01D2259/40064; B01D2259/40066; B01D2259/40069; B01D2259/402; B01D2259/404; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
377 words
1 . A process for separating carbon monoxide from a feed gas comprising C0 2 , CO and less adsorbable component than CO through PSA by using at least two adsorption columns in two stage adsorption operation which comprises a first adsorption stage for removing C0 2 from said feed gas and a second adsorption stage for separating CO from gaseous mixture withdrawn from the first adsorption stage: (1) the first adsorption stage comprising a pressure swing adsorption repeating adsorption and desorption by using at least two adsorption columns containing an adsorbent exhibiting selective adsorb property to carbon dioxide to remove carbon dioxide from said feed gas, and (2) the second adsorption stage comprising a process for separating carbon monoxide from the gaseous mixture, which has been withdrawn from the first adsorption stage, through PSA by using at least two adsorption column containing an adsorbent exhibiting selective absorb property to carbon monoxide which comprises: (i) a step of pressurizing an adsorption column by the gaseous mixture which has been withdrawn from the first adsorption stage (hereinunder be referred to as first stage product gas), in which the step (vi) was previously completed; (ii) a step of introducing the first stage product gas into the adsorption column, in which step (i) was previously completed, so as to adsorb carbon monoxide on or in the adsorbent; (iii) a step of connecting the adsorption column, in which step (ii) was previously completed, to the other adsorption column in which step (v) was previously completed, to reduce the pressure in the former adsorption column, and increase pressure in the latter adsorption column; (iv) a step of purging less adsorbable component than CO by passing product gas through the adsorption column, in which step (iii) was previously completed; (v) a step of evacuating the adsorption column, in which step (iv) was previously completed, to recover carbon monoxide adsorbed on or in the adsorbent of the adsorption column; and (vi) a step of connecting the adsoprtion column, in which step (v) was previously completed, to the other adsorption column, in which step (ii) was previously completed to increase pressure in the former column, periodically switching the flow between or among said adsorption columns so as to repeat the above steps in the columns.
Claim 2
Dependent Claim
377 words
1 . A process for separating carbon monoxide from a feed gas comprising C0 2 , CO and less adsorbable component than CO through PSA by using at least two adsorption columns in two stage adsorption operation which comprises a first adsorption stage for removing C0 2 from said feed gas and a second adsorption stage for separating CO from gaseous mixture withdrawn from the first adsorption stage: (1) the first adsorption stage comprising a pressure swing adsorption repeating adsorption and desorption by using at least two adsorption columns containing an adsorbent exhibiting selective adsorb property to carbon dioxide to remove carbon dioxide from said feed gas, and (2) the second adsorption stage comprising a process for separating carbon monoxide from the gaseous mixture, which has been withdrawn from the first adsorption stage, through PSA by using at least two adsorption column containing an adsorbent exhibiting selective absorb property to carbon monoxide which comprises: (i) a step of pressurizing an adsorption column by the gaseous mixture which has been withdrawn from the first adsorption stage (hereinunder be referred to as first stage product gas), in which the step (vi) was previously completed; (ii) a step of introducing the first stage product gas into the adsorption column, in which step (i) was previously completed, so as to adsorb carbon monoxide on or in the adsorbent; (iii) a step of connecting the adsorption column, in which step (ii) was previously completed, to the other adsorption column in which step (v) was previously completed, to reduce the pressure in the former adsorption column, and increase pressure in the latter adsorption column; (iv) a step of purging less adsorbable component than CO by passing product gas through the adsorption column, in which step (iii) was previously completed; (v) a step of evacuating the adsorption column, in which step (iv) was previously completed, to recover carbon monoxide adsorbed on or in the adsorbent of the adsorption column; and (vi) a step of connecting the adsoprtion column, in which step (v) was previously completed, to the other adsorption column, in which step (ii) was previously completed to increase pressure in the former column, periodically switching the flow between or among said adsorption columns so as to repeat the above steps in the columns.
Claim 3
Dependent Claim
142 words
The process as defined in Claim I wherein said first adsorption stage comprises: (i) a step of pressurizing an adsorption column by said feed, (ii) a step-of introducing said feed gas into the adsorption column, in which step (i) was previously completed, so as to adsorb carbon dioxide as a main component on or in the adsorbent, (iii) a step of depressurizing the adsorption column, in which step (ii) was previously completed, to near one atmospheric pressure, (iv) a step of evacuating the column, in which step (iii) was previously completed, and (v) a step of purging carbon dioxide by introducing into the column, in which step (iv) was previously completed, the waste gas obtained in the adsorbing step of the second stage, periodically switching the flow between or among said columns so as to repeat the above steps in the columns.
Claim 4
Dependent Claim
52 words
The process as defined in Claim 1 wherein after step (ii) of the second stage is completed and before step (iii) of the second stage is started, the second stage further contains a step of depressuring the column, thereby discharging part of the gas remaining in the column outside all the columns.
Claim 5
Dependent Claim
34 words
The process as defined in Claim 1 wherein after step (vi) is completed, the second stage further contains a step of pressurizing the column by gas withdrawn in the purging step of other column.
Claim 6
Dependent Claim
34 words
The process as defined in Claim 3 wherein after step (vi) is completed, the second stage further contains a step of pressurizing the column by gas withdrawn in the purging step of other column.
Claim 7
Dependent Claim
13 words
The process according to Claim 1 wherein step (iii) is countercurrently carried out.
Claim 8
Dependent Claim
17 words
7 . The process according to Claim 1 wherein purge by product gas is concurrently carried out.
Claim 9
Dependent Claim
15 words
8 . The process according to Claim 1 wherein the evacuation is countercurrently carried out.
Claim 10
Dependent Claim
273 words
A process for separating carbon monoxide from a feed gas comprising carbon monoxide and less adsorbable component than CO through pressure swing adsorption by using at least two adsorption columns containing an adsorbent exhibiting selective adsorb property to carbon monoxide which comprises: (i) a step of pressurizing an adsorption column by the feed gas, in which the step (vi) was previously completed; (ii) a step of introducing the feed gas into the adsorption column, in which step (i) was previously completed, so as to adsorb carbon monoxide on or in the adsorbent, (iii) a step of connecting the adsorption column, in which step (ii) was previously completed, to the other adsorption column in which step (v) was previously completed, to reduce the pressure in the former adsorption column, and to increase pressure in the latter adsorption column; (iv) a step of purging less adsorbable component than CO by passing product gas through the adsorption column, in which step (iii) was previously completed; (v) a step of evacuating the adsorption column, in which step (iv) was previously completed, to recover carbon monoxide adsorbed on or in the adsorbent of the adsoprtion column; (vi) a step of a connecting the adsorption column, in which step (v) was previously completed, to the other adsorption column in which step (ii) was previously completed to increase pressure in the former column, and (vii) a step of introducing into the adsorption column in which step (vi) was previously completed the gas withdrawn in step (iv) of the other column, periodically switching the flow between or among said adsorption columns so as to repeat the above steps in the columns.
Claim 11
Dependent Claim
273 words
A process for separating carbon monoxide from a feed gas comprising carbon monoxide and less adsorbable component than CO through pressure swing adsorption by using at least two adsorption columns containing an adsorbent exhibiting selective adsorb property to carbon monoxide which comprises: (i) a step of pressurizing an adsorption column by the feed gas, in which the step (vi) was previously completed; (ii) a step of introducing the feed gas into the adsorption column, in which step (i) was previously completed, so as to adsorb carbon monoxide on or in the adsorbent, (iii) a step of connecting the adsorption column, in which step (ii) was previously completed, to the other adsorption column in which step (v) was previously completed, to reduce the pressure in the former adsorption column, and to increase pressure in the latter adsorption column; (iv) a step of purging less adsorbable component than CO by passing product gas through the adsorption column, in which step (iii) was previously completed; (v) a step of evacuating the adsorption column, in which step (iv) was previously completed, to recover carbon monoxide adsorbed on or in the adsorbent of the adsoprtion column; (vi) a step of a connecting the adsorption column, in which step (v) was previously completed, to the other adsorption column in which step (ii) was previously completed to increase pressure in the former column, and (vii) a step of introducing into the adsorption column in which step (vi) was previously completed the gas withdrawn in step (iv) of the other column, periodically switching the flow between or among said adsorption columns so as to repeat the above steps in the columns.
Claim 12
Dependent Claim
52 words
The process as defined in Claim 9 wherein after step (ii) of the second stage is completed and before step (iii) of the second stage is started, the second stage further contains a step of depressuring the column, thereby removing part of the gas remaining in the column outside all the columns.
Claim 13
Dependent Claim
13 words
The process according to Claim 9 wherein step (iii) is countercurrently carried out.
Claim 14
Dependent Claim
15 words
The process according to Claim 9 wherein purge by product gas is concurrently carried out.
Claim 15
Dependent Claim
13 words
The process according to Claim 9 wherein the evacuation is countercurrently carried out.
Claim 16
Dependent Claim
270 words
A process for separating carbon monoxide from a feed gas comprising at least carbon monoxide and less adsorbable component than CO through pressure swing adsorption by using at least two adsorption columns containing an adsorbent exhibiting selective adsorb property to carbon monoxide which comprises: (i) a step of pressurizing an adsorption column by the feed gas, in which the step (vi) was previously completed; (ii) a step of introducing the feed gas into the adsorption column, in which step (i) was previously completed, so as to adsorb carbon monoxide on or in the adsorbent; (iii) a step of removing part of the gas remaining the adsorption column, in which step (ii) was previously completed, outside all the adsorption columns, (iv) a step of connecting the adsorption column, in which step (iii) was previously completed, to the other adsorption column in which step (v) was previously completed, to reduce the pressure in the former adsorption column, and to increase pressure in the latter adsorption column; (v) a step of purging nitrogen by passing product gas through the adsoprtion column, in which step (iv) was previously completed; (vi) a step of evacuating the adsorption column, in which step (v) was previously completed, to recover carbon monoxide adsorbed on or in the adsorbent of the adsorption column; and (vii) a step of a connecting the adsorption column, in which step (vi) was previously completed, to the other adsorption column in which step (ii) was previously completed to increase pressure in the former column, periodically switching the flow between or among said adsorption columns so as to repeat the above step in the columns.
Claim 17
Dependent Claim
270 words
A process for separating carbon monoxide from a feed gas comprising at least carbon monoxide and less adsorbable component than CO through pressure swing adsorption by using at least two adsorption columns containing an adsorbent exhibiting selective adsorb property to carbon monoxide which comprises: (i) a step of pressurizing an adsorption column by the feed gas, in which the step (vi) was previously completed; (ii) a step of introducing the feed gas into the adsorption column, in which step (i) was previously completed, so as to adsorb carbon monoxide on or in the adsorbent; (iii) a step of removing part of the gas remaining the adsorption column, in which step (ii) was previously completed, outside all the adsorption columns, (iv) a step of connecting the adsorption column, in which step (iii) was previously completed, to the other adsorption column in which step (v) was previously completed, to reduce the pressure in the former adsorption column, and to increase pressure in the latter adsorption column; (v) a step of purging nitrogen by passing product gas through the adsoprtion column, in which step (iv) was previously completed; (vi) a step of evacuating the adsorption column, in which step (v) was previously completed, to recover carbon monoxide adsorbed on or in the adsorbent of the adsorption column; and (vii) a step of a connecting the adsorption column, in which step (vi) was previously completed, to the other adsorption column in which step (ii) was previously completed to increase pressure in the former column, periodically switching the flow between or among said adsorption columns so as to repeat the above step in the columns.
Claim 18
Dependent Claim
13 words
The process according to Claim 14 wherein step (iv) is countercurrently carried out.
Claim 19
Dependent Claim
15 words
The process according to Claim 14 wherein purge by product gas is concurrently carried out.
Claim 20
Dependent Claim
13 words
The process according to Claim 14 wherein the evacuation is countercurrently carried out.
Claim 21
Dependent Claim
202 words
A process for separating carbon monoxide from a feed gas comprising at least carbon monoxide and less adsorbable than CO through pressure swing adsorption by using an aparatus comprising: (i) at least two adsorption columns containig an adsorbent exhibiting selective adsorb property to carbon monoxide, (ii) a suction means provided on the exit side of the columns and/or a pumping means provided on the entry side of the columns, and (iii) buffer tank for feed gas, the process comprising: (i) a step of introducing a feed gas into the adsorption column, in which step (iv) was previously completed; (ii) a step of introducing said feed gas into the column, in which step (i) was previously completed, by means of the suction means and/or the pumping means so as to adsorb on or in the adsorbent at near atmospheric pressure; (iii) a step of purging less adsorbable component than CO by passing product gas through the adsorption column, in which step (ii) was previously completed, and (iv) a step of evacuating the column, in which step (iii) was previously completed to recover carbon monoxide, periodically switching the flow between or among said columns so as to repeat the above steps in the columns.
Claim 22
Dependent Claim
202 words
A process for separating carbon monoxide from a feed gas comprising at least carbon monoxide and less adsorbable than CO through pressure swing adsorption by using an aparatus comprising: (i) at least two adsorption columns containig an adsorbent exhibiting selective adsorb property to carbon monoxide, (ii) a suction means provided on the exit side of the columns and/or a pumping means provided on the entry side of the columns, and (iii) buffer tank for feed gas, the process comprising: (i) a step of introducing a feed gas into the adsorption column, in which step (iv) was previously completed; (ii) a step of introducing said feed gas into the column, in which step (i) was previously completed, by means of the suction means and/or the pumping means so as to adsorb on or in the adsorbent at near atmospheric pressure; (iii) a step of purging less adsorbable component than CO by passing product gas through the adsorption column, in which step (ii) was previously completed, and (iv) a step of evacuating the column, in which step (iii) was previously completed to recover carbon monoxide, periodically switching the flow between or among said columns so as to repeat the above steps in the columns.
Claim 23
Dependent Claim
40 words
The process as defined in Claim 18 wherein the process further contains a step of pressuring the column by introducing the gas withdrawn in the purging step of other column into the column, in which step (iv) was previously completed.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.