US4747855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid absorbent for unsaturated hydrocarbon and process for separation of unsaturated hydrocarbon from gas mixture
Assignee: Individual
•
Filing: 1987-01-21
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Granted: 1988-05-31
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Expires: 2007-01-21
Abstract
Abstract A solid adsorbent for an unsaturated hydrocarbon including (a) (i) a copper(I) halide or oxide or (ii) a halide, carboxylate, sulfate, basic salt, oxide, or amine complex salt of copper(II) and (b) activated carbon or graphite is described. This solid adsorbent can effectively adsorb an unsaturated hydrocarbon such as ethylene from a gas mixture by being placed in contact with the gas mixture at a temperature of -40° C. to 90° C. under normal pressure.
Inventors
- 👤 Hidefumi Hirai
- 👤 Makoto Komiyama
- 👤 Keiichiro Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:34
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/20; C; C07; C07C; C07C7/00; C07C7/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
A process for recovering an unsaturated hydrocarbon from a gas mixture containing the same comprising the steps of: (1) contacting the gas mixture with solid adsorbent, said solid adsorbent comprising: (a) a cooper (I) halide or oxide and (b) activated carbon or graphite, and being prepared by dissolving or suspending a component (a) in an aqueous hydrochloric acid and adding the activated carbon or graphite to a resultant solution or suspension, followed by evaporating a solvent from a mixture; and then (2) (i) heating the solid adsorbent (ii) evacuating a system containing the solid adsorbent, or (iii) decreasing a partial pressure of an unsaturated hydrocarbon in the system containing the solid adsorbent whereby the adsorbed unsaturated hydrocarbon is released.
Claim 2
Dependent Claim
119 words
A process for recovering an unsaturated hydrocarbon from a gas mixture containing the same comprising the steps of: (1) contacting the gas mixture with solid adsorbent, said solid adsorbent comprising: (a) a cooper (I) halide or oxide and (b) activated carbon or graphite, and being prepared by dissolving or suspending a component (a) in an aqueous hydrochloric acid and adding the activated carbon or graphite to a resultant solution or suspension, followed by evaporating a solvent from a mixture; and then (2) (i) heating the solid adsorbent (ii) evacuating a system containing the solid adsorbent, or (iii) decreasing a partial pressure of an unsaturated hydrocarbon in the system containing the solid adsorbent whereby the adsorbed unsaturated hydrocarbon is released.
Claim 3
Dependent Claim
25 words
A process as claimed in claim 1, wherein the unsaturated hydrocarbon is a monoolefin having 2 to 5 carbon atoms, a polyolefin, or a diene.
Claim 4
Dependent Claim
13 words
A process as claimed in claim 1, wherein the unsaturated hydrocarbon is ethylene.
Claim 5
Dependent Claim
31 words
A process as claimed in claim 1, wherein the gas mixture is placed in contact with the solid adsorbent at a temperature of -40° C. to 90° C. under normal pressures.
Claim 6
Dependent Claim
59 words
A solid adsorbent for an unsaturated hydrocarbon comprising: (a) a cooper (I) halide or oxide and (b) activated carbon or graphite, said solid adsorbent being prepared by dissolving or suspending a component (a) in an aqueous hydrochloric acid and adding the activated carbon or graphite to a resultant solution or suspension, followed by evaporating a solvent from a mixture.
Claim 7
Dependent Claim
59 words
A solid adsorbent for an unsaturated hydrocarbon comprising: (a) a cooper (I) halide or oxide and (b) activated carbon or graphite, said solid adsorbent being prepared by dissolving or suspending a component (a) in an aqueous hydrochloric acid and adding the activated carbon or graphite to a resultant solution or suspension, followed by evaporating a solvent from a mixture.
Claim 8
Dependent Claim
24 words
A solid adsorbent as claimed in claim 5, wherein a weight ratio of a component (b) to the component (a) is 0.5 to 60.0.
Claim 9
Dependent Claim
17 words
A solid adsorbent as claimed in claim 5, wherein the copper (I) halide is copper (I) chloride.
References Cited (Backward Citations)
US1519470A
Cited
US2528517A
Cited
US2476472A
Cited
US2920050A
Cited
US2963441A
Cited
US2606938A
Cited
US3276186A
Cited
US3416293A
Cited
US3651159A
Cited
US3883637A
Cited
DE2840791A1
Cited
US4234460A
Cited
US4242226A
Cited
DE3013256A1
Cited
US4470829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |