Patent US4914076A successfully refreshed from Google Patents.
US4914076A
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Method of producing an adsorbent for separation and recovery of CO
Assignee: Kansai Coke and Chemicals Co Ltd
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Filing: 1988-12-01
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Granted: 1990-04-03
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Expires: 2008-12-01
Abstract
Abstract The adsorbent for separation and recovery of CO is prepared by contacting an alumina or silica-alumina carrier with a mixed solution or dispersion of a cupric salt and a reducing agent in a solvent and, then, removing the solvent. The preferred cupric salt is cupric chloride.
Inventors
- 👤 Toshiaki Tsuji
- 👤 Akira Shiraki
- 👤 Hiroaki Shimono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:46
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/02; B01J20/0203; B01J20/0233; B01J20/0237; B01J20/0274; B01J20/0288; B01J20/3231; B01J20/3234; B01J20/3236; C; C01; C01B; C01B32/00; C01B32/40
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
69 words
A method of producing an adsorbent for separation and recovery of CO which comprises contacting an alumina or silica-alumina carrier with a mixed solution or dispersion of a cupric salt and a reducing agent in a solvent and, then, removing the solvent, wherein said reducing agent is a salt of a metal in a low valence state or an organic compound which is in a degree of low oxidation.
Claim 2
Independent Claim
69 words
A method of producing an adsorbent for separation and recovery of CO which comprises contacting an alumina or silica-alumina carrier with a mixed solution or dispersion of a cupric salt and a reducing agent in a solvent and, then, removing the solvent, wherein said reducing agent is a salt of a metal in a low valence state or an organic compound which is in a degree of low oxidation.
Claim 3
Dependent Claim
46 words
The method of claim 1 wherein the amount of said cupric salt relative to said carrier is 0.5 to 10 mmols/g and the amount of said reducing agent supported on the carrier is sufficient to reduce the cupric ion supported on the carrier to cuprous ion.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein, after removal of the solvent, the adsorbent is further subjected to heat treatment in an inert gas or reducing gas atmosphere.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said cupric salt is cupric chloride.
References Cited (Backward Citations)
US3575885A
Cited
US4019879A
Cited
US4127503A
Cited
US4470829A
Cited
JPS61124638A
Cited
US4713090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |