GB1371700A - Method of purifying propylene oxide - Google Patents
Method of purifying propylene oxideInfo
- Publication number
- GB1371700A GB1371700A GB803272A GB803272A GB1371700A GB 1371700 A GB1371700 A GB 1371700A GB 803272 A GB803272 A GB 803272A GB 803272 A GB803272 A GB 803272A GB 1371700 A GB1371700 A GB 1371700A
- Authority
- GB
- United Kingdom
- Prior art keywords
- propylene oxide
- stage
- aqueous alkaline
- solution
- alkaline 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Epoxy Compounds (AREA)
Abstract
1371700 Purifying propylene oxide BADISCHE ANILIN- & SODA-FABRIK AG 22 Feb 1972 [25 Feb 1971] 8032/72 Heading C2C Propylene oxide containing as impurities one or more C 5 to C 7 hydrocarbons, methyl formate and/or one or more carbonyl compounds is purified by extractive distillation using an aqueous alkaline solution as extracting agent, wherein (a) the crude propylene oxide is subjected in a first stage, to extractive distillation in which, by weight, from 2 to 20 parts of aqueous alkaline solution pass continuously downwards through a column per part of propylene oxide passed upwards therethrough, the concentration of said solution being such that the pH of the bottoms is from 7 to 11 and (b) the bottoms obtained in the-first stage and containing prepurified propylene oxide are subjected in a second stage either (b 1 ) to extractive distillation in which by weight, from 1À5 to 6À5 parts of aqueous alkaline solution flow counter-currently to propylene oxide down through the column per part of propylene oxide fed to the first stage, the concentration of said solution being such that the pH of the bottoms is from 7 to 11, the purified propylene oxide being recovered as overheads, or (b 2 ) in cases where it is not necessary to remove carbonyl compounds, to fractional distillation, propylene oxide being recovered as distillate. The aqueous alkaline solution may be caustic soda, caustic potash or milk of lime solution.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712108922 DE2108922A1 (en) | 1971-02-25 | 1971-02-25 | Process for purifying propylene oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1371700A true GB1371700A (en) | 1974-10-23 |
Family
ID=5799777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB803272A Expired GB1371700A (en) | 1971-02-25 | 1972-02-22 | Method of purifying propylene oxide |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE779705A (en) |
| DE (1) | DE2108922A1 (en) |
| FR (1) | FR2126235B1 (en) |
| GB (1) | GB1371700A (en) |
| IT (1) | IT948585B (en) |
| NL (1) | NL7202455A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007078488A1 (en) * | 2005-12-22 | 2007-07-12 | Lyondell Chemical Technology, L.P. | Propylene oxide purification and recovery |
| CN111467826A (en) * | 2020-05-27 | 2020-07-31 | 天津大沽化工股份有限公司 | Device and method for removing aldehydes of propylene oxide product |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5363303A (en) * | 1976-11-15 | 1978-06-06 | Showa Denko Kk | Purification of olefin oxides |
| US4691035A (en) * | 1986-04-14 | 1987-09-01 | Texaco Inc. | Purification of propylene oxide by treatment with a selected base and inert salt |
| US4691034A (en) * | 1986-04-14 | 1987-09-01 | Texaco, Inc. | Purification of propylene oxide by treatment with calcium hydroxide in glycerol or sugar water |
| US5133839A (en) * | 1991-07-25 | 1992-07-28 | Arco Chemical Technology, L.P. | Lower alkylene oxide purification |
-
1971
- 1971-02-25 DE DE19712108922 patent/DE2108922A1/en active Pending
-
1972
- 1972-02-14 IT IT4831772A patent/IT948585B/en active
- 1972-02-21 FR FR7205712A patent/FR2126235B1/fr not_active Expired
- 1972-02-22 GB GB803272A patent/GB1371700A/en not_active Expired
- 1972-02-23 BE BE779705A patent/BE779705A/en unknown
- 1972-02-24 NL NL7202455A patent/NL7202455A/xx unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007078488A1 (en) * | 2005-12-22 | 2007-07-12 | Lyondell Chemical Technology, L.P. | Propylene oxide purification and recovery |
| CN101341139B (en) * | 2005-12-22 | 2011-05-18 | 利安德化学技术有限公司 | Propylene oxide purification and recovery |
| CN111467826A (en) * | 2020-05-27 | 2020-07-31 | 天津大沽化工股份有限公司 | Device and method for removing aldehydes of propylene oxide product |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2126235B1 (en) | 1975-08-29 |
| NL7202455A (en) | 1972-08-29 |
| FR2126235A1 (en) | 1972-10-06 |
| BE779705A (en) | 1972-08-23 |
| IT948585B (en) | 1973-06-11 |
| DE2108922A1 (en) | 1972-08-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |