GB1435848A - Method of recovering ethylene oxide - Google Patents
Method of recovering ethylene oxideInfo
- Publication number
- GB1435848A GB1435848A GB1554374A GB1554374A GB1435848A GB 1435848 A GB1435848 A GB 1435848A GB 1554374 A GB1554374 A GB 1554374A GB 1554374 A GB1554374 A GB 1554374A GB 1435848 A GB1435848 A GB 1435848A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ethylene oxide
- aqueous
- ethylene
- reaction product
- aqueous solution
- 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)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Catalysts (AREA)
Abstract
1435848 Recovery of ethylene oxide; ethylene glycol NIPPON SHOKUBAI KAGAKU KOGYO CO Ltd 8 April 1974 15543/74 Heading C2C Ethylene oxide is recovered from a gaseous reaction product obtained by oxidizing ethylene in the vapour phase with molecular O 2 in the presence of a silver-containing catalyst by a method which comprises: (a) passing the gaseous reaction product to an absorption column maintained at a pressure of 2 to 40 kg./cm.<SP>2</SP>; (b) counter-currently contacting the gaseous reaction product in the absorption column with an aqueous aborbent having a pH of 3 to 12 and containing 0À1 to 40% by wt. of and 0À5 to 1000 p.p.m. of a defoaming agent, to form an aqueous ethylene oxide solution; (c) passing the aqueous ethylene oxide solution formed in step (b) to a stripping column; (d) stripping and recovering ethylene oxide from the aqueous ethylene oxide solution; and (e) recycling at least part of the stripped aqueous solution remaining after step (d) to the absorption column. Ethylene glycol may be recovered by removing part of the stripped aqueous solution remaining after step (d) and recovering it therefrom. Specified defoaming agents are organopolysiloxanes and polyalkylene glycols of greater hydrophobicity than ethylene glycol. The pH of aqueous absorbent may be maintained above 3 by the addition of an aqueous solution of KOH, NaOH or Na 2 CO 2 to the recycled stripped aqueous solution. An apparatus is described for carrying out the process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1554374A GB1435848A (en) | 1974-04-08 | 1974-04-08 | Method of recovering ethylene oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1554374A GB1435848A (en) | 1974-04-08 | 1974-04-08 | Method of recovering ethylene oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1435848A true GB1435848A (en) | 1976-05-19 |
Family
ID=10061000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1554374A Expired GB1435848A (en) | 1974-04-08 | 1974-04-08 | Method of recovering ethylene oxide |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1435848A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7704908B2 (en) | 2005-12-22 | 2010-04-27 | Shell Oil Company | Method for reusing rhenium from a donor spent epoxidation catalyst |
-
1974
- 1974-04-08 GB GB1554374A patent/GB1435848A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7704908B2 (en) | 2005-12-22 | 2010-04-27 | Shell Oil Company | Method for reusing rhenium from a donor spent epoxidation catalyst |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |