GB854988A - Improvements in or relating to the production of polyethylene - Google Patents
Improvements in or relating to the production of polyethyleneInfo
- Publication number
- GB854988A GB854988A GB648057A GB648057A GB854988A GB 854988 A GB854988 A GB 854988A GB 648057 A GB648057 A GB 648057A GB 648057 A GB648057 A GB 648057A GB 854988 A GB854988 A GB 854988A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxygen
- components
- catalyst
- aluminium
- polyethylene
- 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)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Polyethylene is prepared by polymerization in an oxygen-free solvent and using as catalyst the product of three components, the first being a compound of a Group IVA, VA, or VIA metal, the second comprising a trialkyl aluminium, a dialkyl aluminium halide and/or a dialkyl monoalkoxy aluminium, and the third being obtained by treating the product of the first and second components with oxygen or an organic peroxide. The third component may be prepared by blowing an oxygen-containing gas into the mixed first and second components, or by adding thereto a solvent containing oxygen. Alternatively a polyethylene obtained by the use of a normal Ziegler type catalyst may be contacted with oxygen, whereby the catalyst contained in the polymer is oxidized, and the resulting material is then used as the third component. The polymerization may be effected continuously or batchwise with continuous addition of ethylene. Polyethylene of high bulk density is obtained.ALSO:A catalyst used in the polymerization of ethylene comprises the product of three components, the first being a compound of a Group IVa, Va or VIa metal, the second comprising a trialkyl aluminium, a dialkyl aluminium halide and/or a dialkyl monoalkoxy aluminium, and the third being obtained by treating the product of the first and second components with oxygen or an organic peroxide in a solvent. The third component may be prepared by blowing an oxygen-containing gas into the mixed first and second components, or by adding thereto a solvent containing oxygen. Alternatively a polyethylene obtained by the use of a normal Ziegler type catalyst may be contacted with oxygen, whereby the catalyst contained in the polymer is oxidized, and the resulting material is then used as the third component. Particular compounds preferred for use in the production of the catalyst are the chlorides, oxychlorides and acetyl-acetonyl salts of Ti, Zr and Cr, and AlEt3, (iBu)2AlCl, Et2AlCl and Et2Al.OEt.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP577056 | 1956-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB854988A true GB854988A (en) | 1960-11-23 |
Family
ID=11620341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB648057A Expired GB854988A (en) | 1956-03-07 | 1957-02-26 | Improvements in or relating to the production of polyethylene |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1420569A1 (en) |
| GB (1) | GB854988A (en) |
-
1957
- 1957-02-26 GB GB648057A patent/GB854988A/en not_active Expired
- 1957-03-07 DE DE19571420569 patent/DE1420569A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1420569A1 (en) | 1968-11-07 |
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