GB1313836A - Process for the preparation of ethylene polymers - Google Patents
Process for the preparation of ethylene polymersInfo
- Publication number
- GB1313836A GB1313836A GB1142171A GB1142171A GB1313836A GB 1313836 A GB1313836 A GB 1313836A GB 1142171 A GB1142171 A GB 1142171A GB 1142171 A GB1142171 A GB 1142171A GB 1313836 A GB1313836 A GB 1313836A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vinyl
- propylene
- molecular weight
- high molecular
- ethylene
- 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)
- Polymerisation Methods In General (AREA)
Abstract
1313836 Separating high molecular weight ethylene polymers MITSUBISHI PETROCHEMICAL CO Ltd 26 April 1971 [27 April 1970 13 Aug 1970] 11421/71 Heading C3P High molecular weight polymer fractions are separated from reaction products obtained by polymerizing ethylene, optionally with other monomers, at 100‹ to 400‹ C. and 700 to 5000 kg./cm.<SP>2</SP> in the presence of an initiator, by subjecting the reaction product to a pressure of 550 to 1500 kg./cm.<SP>2</SP> at a temperature at which further polymerization does not occur and at which a high molecular weight polymer fraction is precipitated, and separating the precipitated polymer. One or more separation steps in the above range may be followed by one or more separation steps at pressures in the range 250 to 300 kg./cm.<SP>2</SP>. Optional comonomers include acrylic and methacrylic acids, esters, amides and nitriles, vinyl and vinylidene halides, vinyl esters, vinyl ethers, vinyl ketones and N-vinylimides; and polymerization may be effected in the presence of conventional peroxy and azo initiatcrs, and hydrocarbon, aldehyde, ketone and chlorinated hydrocarbon chain transfer agents. Apparatus suitable for carrying out the process of the invention is described and illustrated, and examples describe the separation of polyethylene prepared in the presence of (I to III) di-t-butyl peroxide and propylene and (IV) oxygen and propylene; and of ethylene/ vinyl acetate copolymer prepared in the presence of (V) oxygen and propylene. The products may be cross-linked, e.g. with dicumyl peroxide.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3569270A JPS5230542B1 (en) | 1970-04-27 | 1970-04-27 | |
| JP7037870A JPS4937434B1 (en) | 1970-08-13 | 1970-08-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1313836A true GB1313836A (en) | 1973-04-18 |
Family
ID=26374685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1142171A Expired GB1313836A (en) | 1970-04-27 | 1971-04-26 | Process for the preparation of ethylene polymers |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE2120624B2 (en) |
| GB (1) | GB1313836A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4342853A (en) * | 1979-07-05 | 1982-08-03 | Societe Chimique Des Charbonnages--Cdf Chimie | Process for manufacturing ethylene polymers |
| US9631035B2 (en) | 2013-12-04 | 2017-04-25 | Basell Polyolefine Gmbh | Process for separating components of a reaction mixture obtained by high-pressure polymerization of ethylenically unsaturated monomers |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2524204C2 (en) * | 1975-05-31 | 1986-07-17 | Basf Ag, 6700 Ludwigshafen | Process for the production of high pressure polyethylene |
| DE2524203A1 (en) * | 1975-05-31 | 1976-12-16 | Basf Ag | PROCESS FOR MANUFACTURING HIGH PRESSURE POLYAETHYLENE |
| DE2524474C2 (en) * | 1975-06-03 | 1986-06-12 | Basf Ag, 6700 Ludwigshafen | Process for the production of high pressure polyethylene |
| DE2606144C2 (en) * | 1976-02-17 | 1983-02-03 | Basf Ag, 6700 Ludwigshafen | Process for the production of high pressure polyethylene |
| DE3633819A1 (en) * | 1986-10-04 | 1988-04-14 | Basf Ag | SEPARATION SYSTEM FOR REDUCING SOLID EMISSIONS IN RELAXATION PRIORITIES AT HIGH PRESSURE POLYMERIZATION REACTORS |
-
1971
- 1971-04-26 GB GB1142171A patent/GB1313836A/en not_active Expired
- 1971-04-27 DE DE19712120624 patent/DE2120624B2/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4342853A (en) * | 1979-07-05 | 1982-08-03 | Societe Chimique Des Charbonnages--Cdf Chimie | Process for manufacturing ethylene polymers |
| US9631035B2 (en) | 2013-12-04 | 2017-04-25 | Basell Polyolefine Gmbh | Process for separating components of a reaction mixture obtained by high-pressure polymerization of ethylenically unsaturated monomers |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2120624A1 (en) | 1971-11-11 |
| DE2120624B2 (en) | 1975-09-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |