US4234460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adsorbent for ethylene and process for preparation thereof
Assignee: Kureha Corp
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Filing: 1978-09-12
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Granted: 1980-11-18
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Expires: 1998-09-12
Abstract
Abstract A novel adsorbent for ethylene prepared by contacting an active carbon with at least one metal substance selected from the group consisting of copper, iron, cobalt, nickel, and their salts in the presence of nitric acid; heating the same at a temperature of 150° to 900° C. in an atmosphere of inert gas and thereby to obtain the adsorbent containing 0.01 to 20% by weight of said metal(s) therein.
Inventors
- 👤 Yasushi Nishimura
- 👤 Yasuo Uehara
- 👤 Tamio Haga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:28
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; A; A23; A23B; A23B7/00; A23B7/14; A23B7/153; A23B7/157; C; C07; C07C; C07C7/00; C07C7/12; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
An adsorbent for removing ethylene from a gas containing ethylene, said adsorbent containing active carbon and from 0.01 to 20% by weight of copper, said adsorbent having been obtained by (a) contacting an active carbon with copper or a salt thereof in the presence of nitric acid; (b) heating the resultant mixture at a temperature of 150° to 900° C. in an inert gas atmosphere whereby the desired adsorbent is obtained.
Claim 2
Dependent Claim
71 words
An adsorbent for removing ethylene from a gas containing ethylene, said adsorbent containing active carbon and from 0.01 to 20% by weight of copper, said adsorbent having been obtained by (a) contacting an active carbon with copper or a salt thereof in the presence of nitric acid; (b) heating the resultant mixture at a temperature of 150° to 900° C. in an inert gas atmosphere whereby the desired adsorbent is obtained.
Claim 3
Dependent Claim
28 words
An adsorbent of claim 1, wherein step (a) is carried out by adding said active carbon into an aqueous nitric acid solution of a salt of said copper.
Claim 4
Dependent Claim
18 words
An adsorbent of claim 2, wherein the concentration of nitric acid is from 0.1 N to 5 N.
Claim 5
Dependent Claim
26 words
An adsorbent of claim 1, wherein said active carbon is premixed with said copper or salt thereof and then added into an aqueous nitric acid solution.
Claim 6
Dependent Claim
18 words
An adsorbent of claim 4, wherein the concentration of nitric acid is from 0.1 N to 5 N.
Claim 7
Dependent Claim
18 words
An adsorbent of claim 1, 2, 3, 4 or 5, wherein said temperature is 200° to 700° C.
Claim 8
Dependent Claim
26 words
An adsorbent of claim 1, 2, 3, 4 or 5, wherein said adsorbent contains said copper in an amount of from 0.1 to 10% by weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |