USRE32590E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for obtaining high-purity carbon monoxide
Assignee: JFE Steel Corp
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Filing: 1986-10-23
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Granted: 1988-02-02
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Expires: 2006-10-23
Abstract
Abstract A process for separating carbon monoxide from a feed gas .[.comprising.]. .Iadd.including .Iaddend.CO 2 , CO and less adsorbable component than CO through PSA by using at least two adsorption columns in two stage adsorption operation which .[.comprises.]. .Iadd.includes .Iaddend.a first adsorption stage for removing CO 2 from .[.said.]. .Iadd.the .Iaddend.feed gas and a second adsorption stage for separating CO from gaseous mixture withdrawn from the first adsorption stage: (1) the first adsorption stage comprising a pressure swing adsorption repeating adsorption and desorption, and (2) the second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depressurization, (iv) purge by product gas, (v) evacuation for recovering product gas, and (vi) pressurization by gas withdrawn in other column, periodically switching the flow between or among .[.said.]. .Iadd.the .Iaddend.columns so as to repeat the above steps in the columns, and a process for separating carbon monoxide from a feed gas .[.comprising.]. .Iadd.including .Iaddend.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.]..Iadd.includes.Iaddend.: (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depressurization, (iv) purge by product gas, (v) evacuation for recovering product gas, and (vi) pressurization by gas withdrawn in other column, periodically switching the flow between or among .[.said.]. .Iadd.the .Iaddend.columns so as to repeat the above steps in the columns are disclosed.
Inventors
- 👤 Toshikazu Sakuraya
- 👤 Tetsuya Fujii
- 👤 Shigeo Matsui
- 👤 Shigeki Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:07
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: 20
Claim 1
Independent Claim
366 words
A process for separating carbon monoxide from a feed gas comprising CO 2 . CO and a less adsorbable component than CO through PSA by using at least two adsorption columns in a two stage adsorption operation which comprises a first adsorption stage for removing CO 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 first stage columns containing an adsorbent exhibiting a selective adsorption 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 for the first adsorption stage, through PSA by using at least two second stage adsorption columns containing an adsorbent exhibiting a selective adsorption property to carbon monoxide which comprises: (i) pressurizing a second stage adsorption column by a first stage product gas which has been withdrawn from the first adsorption stage, in which the step (vi) was previously completed; (ii) introducing the first stage product gas into the second stage adsorption column, in which step (i) was previously completed, so as to effect adsorption of carbon monoxide; (iii) connecting the second stage adsorption column in which step (ii) was previously completed, to the other second stage absorption 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) purging a less adsorbable component than CO by passing product gas through the second stage adsorption column, in which step (iii) was previously completed; (v) evacuating the second stage adsorption column, in which step (iv) was previously completed, to recover carbon monoxide adsorbed by the adsorbent of the adsorption column; and (vi) connecting the second stage 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, periodically switching to the flow among said adsorption columns so as to repeat the above steps in the columns.
Claim 2
Dependent Claim
366 words
A process for separating carbon monoxide from a feed gas comprising CO 2 . CO and a less adsorbable component than CO through PSA by using at least two adsorption columns in a two stage adsorption operation which comprises a first adsorption stage for removing CO 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 first stage columns containing an adsorbent exhibiting a selective adsorption 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 for the first adsorption stage, through PSA by using at least two second stage adsorption columns containing an adsorbent exhibiting a selective adsorption property to carbon monoxide which comprises: (i) pressurizing a second stage adsorption column by a first stage product gas which has been withdrawn from the first adsorption stage, in which the step (vi) was previously completed; (ii) introducing the first stage product gas into the second stage adsorption column, in which step (i) was previously completed, so as to effect adsorption of carbon monoxide; (iii) connecting the second stage adsorption column in which step (ii) was previously completed, to the other second stage absorption 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) purging a less adsorbable component than CO by passing product gas through the second stage adsorption column, in which step (iii) was previously completed; (v) evacuating the second stage adsorption column, in which step (iv) was previously completed, to recover carbon monoxide adsorbed by the adsorbent of the adsorption column; and (vi) connecting the second stage 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, periodically switching to the flow among said adsorption columns so as to repeat the above steps in the columns.
Claim 3
Dependent Claim
130 words
The process as defined in claim 1 wherein said first adsorption stage comprises: (i) pressuring a first stage adsorption column by said feed, (ii) introducing said feed gas into the first stage adsorption column, in which step (i) was previously completed, so as to adsorb carbon dioxide as a main component, (iii) depressurizing the first stage adsorption column, in which step (ii) was previously completed, to near one atmospheric pressure, (iv) evacuating the first stage column, in which step (iii) was previously completed, and (v) purging carbon dioxide by introducing into first stage column, in which step (iv) was previously completed, the waste gas obtained in the adsorbing step of the second stage. periodically switching the flow among said columns so as to repeat the above steps in the columns.
Claim 4
Dependent Claim
56 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 depressurizing the second stage column, thereby discharging part of the gas remaining in the second stage column outside all the columns.
Claim 5
Dependent Claim
38 words
The process as defined in claim 3 wherein after step (vi) is completed, the second stage further contains a step of pressurizing the second stage column by gas withdrawn in the purging step of other second stage column.
Claim 6
Dependent Claim
38 words
The process as defined in claim 1 wherein after step (vi) is completed, the second stage further contains a step of pressurizing the second stage column by gas withdrawn in the purging step of other second stage column.
Claim 7
Dependent Claim
13 words
The process according to claim 1 wherein step (iii) is countercurrently carried out.
Claim 8
Dependent Claim
15 words
The process according to claim 1 wherein purge by product gas is concurrently carried out.
Claim 9
Dependent Claim
13 words
The process according to claim 1 wherein the evacuation is countercurrently carried out.
Claim 10
Dependent Claim
241 words
The 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 a selective adsorbtion property to carbon monoxide which comprises: (i) pressurizing an adsorption column by the feed gas, in which the step (vi) was previously completed; (ii) introducing the feed gas into the adsorption column, in which step (i) ws previously completed, so as to adsorb carbon monoxide, (iii) 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) purging less adsorbable component than CO by passing product gas through the adsorption column, in which step (iii) was previously completed; (v) evacuating the adsorption column, in which step (iv) was previously completed, to recover carbon monoxide adsorbed within the adsorption column; (vi) 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) 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 among said adsorption columns so as to repeat the above steps in the columns.
Claim 11
Dependent Claim
241 words
The 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 a selective adsorbtion property to carbon monoxide which comprises: (i) pressurizing an adsorption column by the feed gas, in which the step (vi) was previously completed; (ii) introducing the feed gas into the adsorption column, in which step (i) ws previously completed, so as to adsorb carbon monoxide, (iii) 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) purging less adsorbable component than CO by passing product gas through the adsorption column, in which step (iii) was previously completed; (v) evacuating the adsorption column, in which step (iv) was previously completed, to recover carbon monoxide adsorbed within the adsorption column; (vi) 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) 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 among said adsorption columns so as to repeat the above steps in the columns.
Claim 12
Dependent Claim
43 words
The process as defined in claim 9 wherein after step (ii) is completed and before step (iii) is started, the second stage further depressuring the column is carried out, 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
242 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) pressurizing an adsorption column by the feed gas, in which the step (vi) was previously completed; (ii) introducing the feed gas into the adsorption column, in which step (i) was previously completed, so as to adsorb carbon monoxide; (iii) removing part of the gas remaining the adsorption column, in which step (ii) was previously completed, outside all the adsorption columns, (iv) 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) purging .[.nitrogen.]. .Iadd.less adsorbable component than CO .Iaddend.by passing product gas through the adsorption column, in which step (iv) was previously completed; (vi) evacuating the adsorption column, in which step (v) was previously completed, to recover carbon monoxide adsorbed in the adsorption column; and (vii) 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 among said adsorption columns so as to repeat the above step in the columns.
Claim 17
Dependent Claim
242 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) pressurizing an adsorption column by the feed gas, in which the step (vi) was previously completed; (ii) introducing the feed gas into the adsorption column, in which step (i) was previously completed, so as to adsorb carbon monoxide; (iii) removing part of the gas remaining the adsorption column, in which step (ii) was previously completed, outside all the adsorption columns, (iv) 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) purging .[.nitrogen.]. .Iadd.less adsorbable component than CO .Iaddend.by passing product gas through the adsorption column, in which step (iv) was previously completed; (vi) evacuating the adsorption column, in which step (v) was previously completed, to recover carbon monoxide adsorbed in the adsorption column; and (vii) 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 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.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |