GB777197A - Improvements in separating polymer admixtures from recycled ethylene during the polymerisation of ethylene under high pressure - Google Patents
Improvements in separating polymer admixtures from recycled ethylene during the polymerisation of ethylene under high pressureInfo
- Publication number
- GB777197A GB777197A GB25613/55A GB2561355A GB777197A GB 777197 A GB777197 A GB 777197A GB 25613/55 A GB25613/55 A GB 25613/55A GB 2561355 A GB2561355 A GB 2561355A GB 777197 A GB777197 A GB 777197A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ethylene
- high pressure
- under high
- stage
- recycled
- 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
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/09—Purification; Separation; Use of additives by fractional condensation
-
- 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)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
<PICT:0777197/IV(a)/1> In a process for the polymerization of ethylene alone or with e.g. propylene, styrene and acrylic esters, under high pressure, e.g. between 800 and 4000 atmospheres and at 40 DEG to 400 DEG C., using an oxygen catalyst, the gas mixture separated from the main part of the polymer is fractionally cooled at temperatures adjusted in the different stages to temperatures above the flow point of the condensed polymer. In a continuous process, after compression in 1 and 2, reaction in 4 and separation in 6, the gas is led through a multi-stage, preferably three-stage, cooling zone at a pressure between 50 and 500 atmospheres comprising a plurality of pipes fitted with cooling jackets 8 and collectors 9 and the purified ethylene is recycled to compressor 2. In an example using a three-stage collector, the polyethylenes collected have molecular weights above 6000, between 1000 and 6000 with melting points between 85 DEG C. and 95 DEG C., and are liquid respectively.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE777197X | 1954-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB777197A true GB777197A (en) | 1957-06-19 |
Family
ID=6686704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25613/55A Expired GB777197A (en) | 1954-09-24 | 1955-09-07 | Improvements in separating polymer admixtures from recycled ethylene during the polymerisation of ethylene under high pressure |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1138171A (en) |
| GB (1) | GB777197A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2964516A (en) * | 1960-12-13 | Recovery of olefin polymers from solution | ||
| US3282911A (en) * | 1962-08-08 | 1966-11-01 | Rexall Drug Chemical | Process for treating ethylene recycle streams |
| US3306889A (en) * | 1963-05-15 | 1967-02-28 | Koppers Co Inc | Ethylene polymerization |
| US3336281A (en) * | 1959-06-23 | 1967-08-15 | Basf Ag | Process for separating ethylene polymers produced under high pressure and apparatus therefor |
-
1955
- 1955-09-07 GB GB25613/55A patent/GB777197A/en not_active Expired
- 1955-12-21 FR FR1138171D patent/FR1138171A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2964516A (en) * | 1960-12-13 | Recovery of olefin polymers from solution | ||
| US3336281A (en) * | 1959-06-23 | 1967-08-15 | Basf Ag | Process for separating ethylene polymers produced under high pressure and apparatus therefor |
| US3282911A (en) * | 1962-08-08 | 1966-11-01 | Rexall Drug Chemical | Process for treating ethylene recycle streams |
| US3306889A (en) * | 1963-05-15 | 1967-02-28 | Koppers Co Inc | Ethylene polymerization |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1138171A (en) | 1957-06-11 |
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