GB874802A - Production and recovery of polymers - Google Patents
Production and recovery of polymersInfo
- Publication number
- GB874802A GB874802A GB32891/58A GB3289158A GB874802A GB 874802 A GB874802 A GB 874802A GB 32891/58 A GB32891/58 A GB 32891/58A GB 3289158 A GB3289158 A GB 3289158A GB 874802 A GB874802 A GB 874802A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- solvent
- zone
- confined
- keep
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Solid polyolefins are recovered from solutions thereof in a volatile solvent by continuously spraying the hot solution into a confined stream of cooler water and passing the resultant mixture, at sufficient pressure to keep the solvent and water liquid, through a confined zone, the residue time in the zone being at least 5 seconds, thus recovering the precipitated polyolefin in a non-fibrous particulate form of high bulk density. The polyolefin, e.g. ethylene or propylene, is preferably high density highly crystalline material prepared in the presence of a particulate catalyst comprising chromium oxide at least partly in hexavalent form, supported on silica-alumina. The solution is preferably at a temperature of 270 DEG -310 DEG F. and the water at such a temperature that the resulting mixture is at 110 DEG -130 DEG F. This mixture may be sprayed into a further stream of water in a confined zone and under sufficient pressure to keep the water and solvent liquid and then passed to a heated zone at a sufficiently low pressure for the solvent to evaporate. Specification 790,195 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US874802XA | 1957-11-18 | 1957-11-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB874802A true GB874802A (en) | 1961-08-10 |
Family
ID=22205436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32891/58A Expired GB874802A (en) | 1957-11-18 | 1958-10-15 | Production and recovery of polymers |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR1193465A (en) |
| GB (1) | GB874802A (en) |
| IT (1) | IT597652A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001097940A1 (en) * | 2000-06-19 | 2001-12-27 | Borealis Technology Oy | Degassing apparatus |
-
0
- IT IT597652D patent/IT597652A/it unknown
-
1958
- 1958-03-19 FR FR1193465D patent/FR1193465A/en not_active Expired
- 1958-10-15 GB GB32891/58A patent/GB874802A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001097940A1 (en) * | 2000-06-19 | 2001-12-27 | Borealis Technology Oy | Degassing apparatus |
| US7267803B2 (en) | 2000-06-19 | 2007-09-11 | Borealis Technology Oy | Degassing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| IT597652A (en) | |
| FR1193465A (en) | 1959-11-03 |
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