US3867470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon separation process
Assignee: Shell USA Inc
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Filing: 1973-12-10
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Granted: 1975-02-18
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Expires: 1993-12-10
Abstract
Abstract Ethylbenzene is separated from a mixture of C8-aromatics through preferential adsorption of ethylbenzene by contacting the mixture with a faujasite having from 64 to 96 aluminum atoms per unit cell, A, and containing a fraction of cesium cation equivalents over total cation equivalents present in the faujasite which is from 0.0119A minus 0.5 to the least of 0.15 or 0.0119A minus 0.7, the remainder of the cations being selected from strontium, calcium and sodium, then desorbing the adsorbed C8-aromatics.
Inventors
- 👤 Grinsven Petrus F A Van
- 👤 Wim Wieldraaijer
- 👤 Rudolf J Maas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:43
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; C; C07; C07C; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
A PROCESS FOR THE SEPARATION OF ETHYLBENZENE FROM A MIXTURE OF C8-AROMATICS WHICH COMPRISES PREFERENTIAL ADSORPTION OF ETHYLBENZENE BY CONTACTING THE MIXTURE UNDER ADSORPTION CONDITIONS WITH A FAUJASITE IN WHICH THE NUMBER OF ALUMINUM ATOMS PER UNIT CELL, A, RANGES FROM 64 TO 96, INCLUSIVE, AND IN WHICH FAUJASITE THE FRACTION OF EQUIVALENTS OF CESIUM CATIONS PRESENT CALCULATED ON TOTAL EQUIVALENTS OF CATIONS PRESENT IN THE FAUJASITE IS FROM 0.0119A MINUS 0.5 TO THE LEAST OF 0.15 OR 0.011A MINUS 0.7, THE REMAINDER OF THE CATIONS PRESENT IN THE FAUJASITE IS SELECTED FROM THE GROUP CONSISTING OF STRONTIUM, CALCIUM AND SODIUM, FOLLOWED BY DESORPTION OF THE ADSORBED C8-AROMATICS.
Claim 2
Dependent Claim
108 words
A PROCESS FOR THE SEPARATION OF ETHYLBENZENE FROM A MIXTURE OF C8-AROMATICS WHICH COMPRISES PREFERENTIAL ADSORPTION OF ETHYLBENZENE BY CONTACTING THE MIXTURE UNDER ADSORPTION CONDITIONS WITH A FAUJASITE IN WHICH THE NUMBER OF ALUMINUM ATOMS PER UNIT CELL, A, RANGES FROM 64 TO 96, INCLUSIVE, AND IN WHICH FAUJASITE THE FRACTION OF EQUIVALENTS OF CESIUM CATIONS PRESENT CALCULATED ON TOTAL EQUIVALENTS OF CATIONS PRESENT IN THE FAUJASITE IS FROM 0.0119A MINUS 0.5 TO THE LEAST OF 0.15 OR 0.011A MINUS 0.7, THE REMAINDER OF THE CATIONS PRESENT IN THE FAUJASITE IS SELECTED FROM THE GROUP CONSISTING OF STRONTIUM, CALCIUM AND SODIUM, FOLLOWED BY DESORPTION OF THE ADSORBED C8-AROMATICS.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the mixture of C8-aromatics comprises para-xylene.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein A ranges from 74 to 96, inclusive.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein the remainder of the cations present in the faujasite is calcium.
Claim 6
Dependent Claim
17 words
The process of claim 1 wherein the remainder of the cations present in the faujasite is sodium.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein the mixture of C8-aromatics contacted with the faujasite is in the liquid phase.
Claim 8
Dependent Claim
14 words
The process of claim 6 wherein the temperature during the contact is from 0*-300*C.
Claim 9
Dependent Claim
15 words
The process of claim 7 wherein the pressure during the contact is about 1 bar.
Claim 10
Dependent Claim
51 words
The process of claim 2 wherein A ranges from 74 to 96, inclusive, the remainder of the cations present in the faujasite is calcium or sodium, the mixture of C8-aromatics is in the liquid phase, and the adsorption conditions include a temperature from 0*-300*C and a pressure of about 1 bar.
References Cited (Backward Citations)
US3626020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |