US4336410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for absorptive separation of cyclohexene
Assignee: Toray Industries Inc
•
Filing: 1981-04-03
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Granted: 1982-06-22
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Expires: 2001-04-03
Abstract
Abstract Cyclohexene can be advantageously separated from a mixture containing as main components benzene, cyclohexene and cyclohexane by a process wherein said mixture is brought into contact with a type X aluminosilicate zeolite, which has been ion-exchanged with a silver ion, as an adsorbent, whereby cyclohexene is selectively adsorbed thereon, and then, cyclohexene is desorbed therefrom. The desorption of cyclohexene is preferably carried out by using a desorbent, such as an alkylbenzene having 7 or 8 carbon atoms in the molecule.
Inventors
- 👤 Tsuneyuki Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:07
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
67 words
An improvement in a process for separating cyclohexene from a mixture containing as main components benzene, cyclohexene and cyclohexane wherein said mixture is brought into contact with a type X aluminosilicate zeolite as an adsorbent whereby cyclohexene is selectively adsorbed thereon, and then, cyclohexene is desorbed therefrom, said improvement comprising using as an adsorbent a type X aluminosilicate zeolite which has been ion-exchanged with a silver ion.
Claim 2
Dependent Claim
67 words
An improvement in a process for separating cyclohexene from a mixture containing as main components benzene, cyclohexene and cyclohexane wherein said mixture is brought into contact with a type X aluminosilicate zeolite as an adsorbent whereby cyclohexene is selectively adsorbed thereon, and then, cyclohexene is desorbed therefrom, said improvement comprising using as an adsorbent a type X aluminosilicate zeolite which has been ion-exchanged with a silver ion.
Claim 3
Dependent Claim
41 words
The process according to claim 1 wherein the degree of ion exchange with silver ions is such that the silver ions occupy at least 20 mole % of the total metal ions present in the silver ion-exchanged type X aluminosilicate zeolite.
Claim 4
Dependent Claim
41 words
The process according to claim 1 wherein the degree of ion exchange with silver ions is such that the silver ions occupy 20 to 90 mole % of the total metal ions present in the silver ion-exchanged type X aluminosilicate zeolite.
Claim 5
Dependent Claim
37 words
The process according to claim 1 wherein the silver ion-exchanged type X aluminosilicate zeolite is subjected to dehydration whereby the water of crystallization is substantially removed therefrom prior to the cyclohexene-containing mixture being brought into contact therewith.
Claim 6
Dependent Claim
25 words
The process according to claim 1 wherein cyclohexene selectively adsorbed on the silver ion-exchanged type X aluminosilicate zeolite is desorbed therefrom by using a desorbent.
Claim 7
Dependent Claim
21 words
The process according to claim 5 wherein the desorbent is an alkylbenzene having 7 or 8 carbon atoms in the molecule.
Claim 8
Dependent Claim
37 words
The process according to claim 5 or 6 wherein the adsorption and desorption are carried out at a temperature of 0° to 300° C. and at a pressure of from atmospheric pressure to 40 kg/cm 2 .
Claim 9
Dependent Claim
28 words
The process according to any one of claims 1 to 6 wherein the selective adsorption of cyclohexene and the desorption thereof are carried out in a continuous manner.
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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) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |