GB849256A - Improvements in or relating to the polymerisation of olefins - Google Patents
Improvements in or relating to the polymerisation of olefinsInfo
- Publication number
- GB849256A GB849256A GB3473257A GB3473257A GB849256A GB 849256 A GB849256 A GB 849256A GB 3473257 A GB3473257 A GB 3473257A GB 3473257 A GB3473257 A GB 3473257A GB 849256 A GB849256 A GB 849256A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reactor
- returned
- withdrawn
- polymerisation
- concentrated slurry
- 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
A low-pressure process for polymerising an olefinic hydrocarbon is carried out in a liquid medium and reaction mixture is withdrawn from the polymerisation reactor during polymerisation, a minor portion of the withdrawn mixture is removed for working-up the polymer product and a major proportion of the withdrawn mixture returned to the reactor the major portion being separated into a concentrated slurry fraction which is returned to the reactor and a solvent fraction which is cooled before being returned to the reactor. In a modification the reaction mixture is separated into a solvent fraction and a concentrated slurry fraction, the solvent fraction being returned to the polymerisation zone after cooling and the concentrated slurry being divided into a minor portion which is removed for working-up and a major proportion which is returned to the reactor. The concentrated slurry may be returned to the reactor as a separate stream, the reaction mixture may be continuously withdrawn from the reactor during polymerisation, the solvent fraction may be mixed with fresh solvent either before or after cooling which may take place in a heat exchanger, the withdrawn mixture may pass through a time tank before separation the tank preferably having an agitator and vent for removing gaseous material. The withdrawn reaction mixture may be separated in a continuous centrifuge or a hydro-cyclone and the concentrated slurry returned to the reactor by means of a screwconveyer. The usual Ziegler catalysts may be used in the polymerisation while ethylene is the specified olefin. Apparatus for carrying out the process is described. Specifications 799,392, 799,823, 801,031, 816,234, 820,263, 833,430, 837,053 and 840,859 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3473257A GB849256A (en) | 1957-11-07 | 1957-11-07 | Improvements in or relating to the polymerisation of olefins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3473257A GB849256A (en) | 1957-11-07 | 1957-11-07 | Improvements in or relating to the polymerisation of olefins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB849256A true GB849256A (en) | 1960-09-21 |
Family
ID=10369288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3473257A Expired GB849256A (en) | 1957-11-07 | 1957-11-07 | Improvements in or relating to the polymerisation of olefins |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB849256A (en) |
-
1957
- 1957-11-07 GB GB3473257A patent/GB849256A/en not_active Expired
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