CA2020406A1 - Chromatographic separation process for recovering either 2,6-det or 3,5-det from a mixture thereof with another det isomer - Google Patents
Chromatographic separation process for recovering either 2,6-det or 3,5-det from a mixture thereof with another det isomerInfo
- Publication number
- CA2020406A1 CA2020406A1 CA 2020406 CA2020406A CA2020406A1 CA 2020406 A1 CA2020406 A1 CA 2020406A1 CA 2020406 CA2020406 CA 2020406 CA 2020406 A CA2020406 A CA 2020406A CA 2020406 A1 CA2020406 A1 CA 2020406A1
- Authority
- CA
- Canada
- Prior art keywords
- det
- isomer
- barium
- feed
- zeolite exchanged
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
3,5-diethyltoluene (3,5-DET) and/or 2,6-diethyltoluene (2,6-DET) is selectively separated from a feed mixture comprising at least one isomer from the group 3,5-DET or 2,6-DET and at least one other DET isomer by contacting the feed mixture at adsorption conditions with an adsorbent selected from the Groups consisting of A) X
zeolite exchanged with a potassium cation; B) X zeolite exchanged with sodium or copper or Y zeolite exchanged with copper, sodium, barium or calcium: and C) X zeolite exchanged with barium or lithium or with potassium and barium or Y zeolite exchanged with potassium, sodium, barium or calcium, thereby selectively adsorbing one of the DET isomers contained in the feed; thereby selectively adsorbing one or more of said DET isomers and removing one or more relatively non-adsorbed isomer(s) from contact with the adsorbent to form a raffinate stream depleted in the adsorbed isomer relative to feed and thereafter contacting the rich adsorbent with a desorbent comprising a monocyclic alkyl-substituted aromatic hydrocarbon at desorption conditions effective to form an extract stream enriched in the adsorbed isomer relative to the feed.
zeolite exchanged with a potassium cation; B) X zeolite exchanged with sodium or copper or Y zeolite exchanged with copper, sodium, barium or calcium: and C) X zeolite exchanged with barium or lithium or with potassium and barium or Y zeolite exchanged with potassium, sodium, barium or calcium, thereby selectively adsorbing one of the DET isomers contained in the feed; thereby selectively adsorbing one or more of said DET isomers and removing one or more relatively non-adsorbed isomer(s) from contact with the adsorbent to form a raffinate stream depleted in the adsorbed isomer relative to feed and thereafter contacting the rich adsorbent with a desorbent comprising a monocyclic alkyl-substituted aromatic hydrocarbon at desorption conditions effective to form an extract stream enriched in the adsorbed isomer relative to the feed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2020406 CA2020406C (en) | 1990-07-04 | 1990-07-04 | Chromatographic separation process for recovering either 2,6-det or 3,5-det from a mixture thereof with another det isomer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2020406 CA2020406C (en) | 1990-07-04 | 1990-07-04 | Chromatographic separation process for recovering either 2,6-det or 3,5-det from a mixture thereof with another det isomer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2020406A1 true CA2020406A1 (en) | 1992-01-05 |
| CA2020406C CA2020406C (en) | 1999-07-06 |
Family
ID=4145406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2020406 Expired - Fee Related CA2020406C (en) | 1990-07-04 | 1990-07-04 | Chromatographic separation process for recovering either 2,6-det or 3,5-det from a mixture thereof with another det isomer |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2020406C (en) |
-
1990
- 1990-07-04 CA CA 2020406 patent/CA2020406C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2020406C (en) | 1999-07-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |