US4477418A
Expired / Lapsed
US
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Process for adsorption
Assignee: Praxair Technology Inc
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Filing: 1983-08-23
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Granted: 1984-10-16
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Expires: 2003-08-23
Abstract
Abstract In a process for the separation of oxygen from a gas stream by adsorption, the improvement comprising using, as the adsorbent, a compound have the formula Mx[M'(CN)6]y wherein M is an element having an atomic number of 21, 25 to 30, 39, 50, or 57 to 59; M' is an element having an atomic number from 24 to 27; and x and y are positive whole numbers such that the sum of the valence of M times x plus the valence of [M'(CN6)] times y is equal to zero.
Inventors
- 👤 Joseph T. Mullhaupt
- 👤 Oren E. Berwaldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:32
CPC Classifications
B; B01; B01D; B01D15/00; C; C01; C01C; C01C3/00; C01C3/08; B01J; B01J20/00; B01J20/22; B01J20/223; C01B; C01B13/00; C01B13/02; C01B13/0229; C01B13/0248; C01B13/0259; C01B13/0262; C01B2210/00; C01B2210/0043; C01B2210/0046
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
65 words
In a process for the separation of oxygen from a gas stream by adsorption, the improvement comprising using, as the adsorbent, a compound having the formula M x [M'(CN) 6 ] y wherein M is an element having an atomic number of 21, 25 to 30, 39, 50, or 57 to 59; M' is an element having an atomic number from 24 to 27; and
Claim 2
Dependent Claim
65 words
In a process for the separation of oxygen from a gas stream by adsorption, the improvement comprising using, as the adsorbent, a compound having the formula M x [M'(CN) 6 ] y wherein M is an element having an atomic number of 21, 25 to 30, 39, 50, or 57 to 59; M' is an element having an atomic number from 24 to 27; and
Claim 3
Dependent Claim
31 words
x and y are positive whole numbers such that the sum of the valence of M times x plus the valence of [M'(CN) 6 ] times y is equal to zero.
Claim 4
Dependent Claim
31 words
x and y are positive whole numbers such that the sum of the valence of M times x plus the valence of [M'(CN) 6 ] times y is equal to zero.
Claim 5
Dependent Claim
13 words
The process defined in claim 1 wherein the compound is Zn.sub.2 [Fe(CN).sub.6 ].
Claim 6
Dependent Claim
13 words
The process defined in claim 1 wherein the compound is Zn.sub.3 [Fe(CN).sub.6 ].sub.2.
Claim 7
Dependent Claim
13 words
The process defined in claim 1 wherein the compound is Co.sub.2 [Fe(CN).sub.6 ].
Claim 8
Dependent Claim
12 words
The process defined in claim 1 wherein the compound is Ce(III)[Fe(III)(CN).sub.6 ].
References Cited (Backward Citations)
US4323543A
Cited
US4338288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |