GB843424A - Improvements in and relating to the polymerization of aliphatic olefins and the resulting polyolefins - Google Patents
Improvements in and relating to the polymerization of aliphatic olefins and the resulting polyolefinsInfo
- Publication number
- GB843424A GB843424A GB28452/58A GB2845258A GB843424A GB 843424 A GB843424 A GB 843424A GB 28452/58 A GB28452/58 A GB 28452/58A GB 2845258 A GB2845258 A GB 2845258A GB 843424 A GB843424 A GB 843424A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxides
- alumina
- silica
- polymerization
- ratio
- 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)
Abstract
A low pressure process for the polymerization of aliphatic olefins comprises contacting an aliphatic olefin with a catalyst comprising oxides, as hereinafter defined, of chromium, aluminium and silicon the ratio by weight of alumina to silica being from 15 : 85 to 40 : 60. Oxides are defined as including both free oxides and those present in chemically combined for e.g. silicates. Specified olefins are ethylene, propylene and their mixtures. The polymerization may be carried out in the liquid phase. The preferred proportions of alumina to silica are from 20 : 80 to 35 : 65 and the chromium oxide content from 0,1 to 10%. Specifications 804,641 and 804,642 are referred to.ALSO:A catalyst for low pressure aliphatic olefin polymerization, comprises oxides of chromium, aluminium and silicon, the ratio of alumina to silica being from 15:85 to 40:60. Oxides is defined as including both free oxides and those present in chemically combined form e.g. silicates. The preferred ratio of alumina to silica is 20:80 to 35:65 while the preferred chromium oxide content is from 0.1 to 10%. The alumina/silica starting material may contain fluorine. Specifications 804,641 and 804,642 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL843424X | 1957-09-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB843424A true GB843424A (en) | 1960-08-04 |
Family
ID=19845071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28452/58A Expired GB843424A (en) | 1957-09-06 | 1958-09-04 | Improvements in and relating to the polymerization of aliphatic olefins and the resulting polyolefins |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE570928A (en) |
| DE (1) | DE1080779B (en) |
| FR (1) | FR1210893A (en) |
| GB (1) | GB843424A (en) |
| NL (2) | NL220578A (en) |
-
0
- NL NL100236D patent/NL100236C/xx active
- BE BE570928D patent/BE570928A/xx unknown
- NL NL220578D patent/NL220578A/xx unknown
-
1958
- 1958-09-04 DE DEN15559A patent/DE1080779B/en active Pending
- 1958-09-04 GB GB28452/58A patent/GB843424A/en not_active Expired
- 1958-09-04 FR FR1210893D patent/FR1210893A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1080779B (en) | 1960-04-28 |
| NL220578A (en) | |
| NL100236C (en) | |
| BE570928A (en) | |
| FR1210893A (en) | 1960-03-11 |
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