BE780228A - Purifying polyoxyalkylene ether polyols - by mixing with solvents, centrifuging, and recovering polyol - Google Patents
Purifying polyoxyalkylene ether polyols - by mixing with solvents, centrifuging, and recovering polyolInfo
- Publication number
- BE780228A BE780228A BE780228A BE780228A BE780228A BE 780228 A BE780228 A BE 780228A BE 780228 A BE780228 A BE 780228A BE 780228 A BE780228 A BE 780228A BE 780228 A BE780228 A BE 780228A
- Authority
- BE
- Belgium
- Prior art keywords
- polyol
- water
- soln
- solvent
- polyoxyalkylene ether
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/30—Post-polymerisation treatment, e.g. recovery, purification, drying
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyethers (AREA)
Abstract
Polyoxyalkylene ether polyols contg. water soluble impurities derived from residual catalyst, and having a mol. wt. >=300 and a content of ethylene oxide units 65%. are purified esp. for polyurethane prepn. by (a) forming a mixt. of water, the polyol, and a solvent which has a density considerably different from that of water, dissolves the polyol and is inert relative to the polyol and water, to give a soln. of the polyol in the solvent, which is immiscible with water, (b) centrifugally sepg. the polyol soln. from the water to give streams of water contg. the impurities, and polyol soln. and (c) recovering the polyol by elimination of the solvent. Simple, efficient process giving polyols with a low impurity content e.g. =2 ppm without use of solid absorbants. Loss of polyol minimised.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00126343A US3823145A (en) | 1968-07-26 | 1971-03-19 | Removal of impurities from polyols |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE780228A true BE780228A (en) | 1972-09-04 |
Family
ID=22424314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE780228A BE780228A (en) | 1971-03-19 | 1972-03-03 | Purifying polyoxyalkylene ether polyols - by mixing with solvents, centrifuging, and recovering polyol |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE780228A (en) |
| IT (1) | IT957525B (en) |
-
1972
- 1972-02-28 IT IT4861672A patent/IT957525B/en active
- 1972-03-03 BE BE780228A patent/BE780228A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| IT957525B (en) | 1973-10-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RE | Patent lapsed |
Owner name: PCUK PRODUITS CHIMIQUES UGINE KUHLMANN Effective date: 19900331 |