GB589547A - Improvements in or relating to the recovery of ethylene oxide from dilute aqueous solutions - Google Patents
Improvements in or relating to the recovery of ethylene oxide from dilute aqueous solutionsInfo
- Publication number
- GB589547A GB589547A GB1088443A GB1088443A GB589547A GB 589547 A GB589547 A GB 589547A GB 1088443 A GB1088443 A GB 1088443A GB 1088443 A GB1088443 A GB 1088443A GB 589547 A GB589547 A GB 589547A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ethylene oxide
- column
- tower
- solution
- steam
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D301/00—Preparation of oxiranes
- C07D301/32—Separation; Purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Epoxy Compounds (AREA)
- Gas Separation By Absorption (AREA)
Abstract
Ethylene oxide is recovered from its dilute aqueous solutions by subjecting the solution to the action of steam in counter-current flow in a packed tower under sub-atmospheric pressure of preferably between about 20 and about 70 mm. mercury such that a substantial, but incomplete condensation of steam takes place, so that there is a difference in temperature of not less than 3 DEG C., and preferably between 3 DEG and 15 DEG C. between the solvent leaving the base of the column and the ethylene oxide solution entering the top of the column. The ethylene oxide issuing from the top of the tower may be absorbed in water in an additional absorption tower to form a more concentrated solution than the starting material. In an example, gaseous ethylene oxide is passed through an absorption tower and the resulting aqueous solution flows to a stripping column down which it trickles against an ascending current of steam, the rate of flow of which is so controlled that, provided that the pressure exerted by the vacuum pump drawing the ethylene oxide and the water vapour from the top of the column is correspondingly regulated, there is maintained a temperature difference of not less than 3 DEG C. between the solution entering the top of the tower and the stripped water leaving the base. Numerical data is included to show the efficiency of the process. Specification 533,054 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1088443A GB589547A (en) | 1943-07-05 | 1943-07-05 | Improvements in or relating to the recovery of ethylene oxide from dilute aqueous solutions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1088443A GB589547A (en) | 1943-07-05 | 1943-07-05 | Improvements in or relating to the recovery of ethylene oxide from dilute aqueous solutions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB589547A true GB589547A (en) | 1947-06-24 |
Family
ID=9976088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1088443A Expired GB589547A (en) | 1943-07-05 | 1943-07-05 | Improvements in or relating to the recovery of ethylene oxide from dilute aqueous solutions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB589547A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8053586B2 (en) | 2008-07-31 | 2011-11-08 | Dow Technology Investments Llc | Alkylene oxide recovery systems |
| US10471371B2 (en) | 2008-01-25 | 2019-11-12 | Dow Technology Investments Llc | Reflux condenser method |
-
1943
- 1943-07-05 GB GB1088443A patent/GB589547A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10471371B2 (en) | 2008-01-25 | 2019-11-12 | Dow Technology Investments Llc | Reflux condenser method |
| US8053586B2 (en) | 2008-07-31 | 2011-11-08 | Dow Technology Investments Llc | Alkylene oxide recovery systems |
| US8129551B2 (en) | 2008-07-31 | 2012-03-06 | Dow Technology Investments Llc | Alkylene oxide recovery systems |
| US8183400B2 (en) | 2008-07-31 | 2012-05-22 | Dow Technology Investments Llc | Alkylene oxide recovery systems |
| US8257558B2 (en) | 2008-07-31 | 2012-09-04 | Dow Technology Investments Llc | Alkylene oxide purification systems |
| US8476464B2 (en) | 2008-07-31 | 2013-07-02 | Dow Technology Investments Llc | Alkylene oxide purification systems |
| US8845863B2 (en) | 2008-07-31 | 2014-09-30 | Dow Technology Investments Llc | Alkylene oxide purification processes and systems |
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