EP0188914A2
Expired / Lapsed
EP
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Process for copolymerization of ethylene
Assignee: Tonen General Sekiyu KK
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Filing: 1985-12-20
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Granted: —
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Expires: 2005-12-20
Abstract
Abstract An improved process for copolymerizing ethylene with an alpha-olefin in the presence of a polymerization catalyst composed of (a) a catalyst component containing titanium and halogen and (b) an organometallic compound, wherein the improvement comprises bringing said catalyst component into contact with an activity inhibitor either prior to activation or after said catalyst component has been activated with said organometallic compound, and subsequently copolymerizing ethylene with an alpha-olefin.
Inventors
- 👤 Mamoru Tachikawa
- 👤 Satoshi Ueki
- 👤 Masato Sakuma
- 👤 Makoto Miyazaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 20:44
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
In a process for copolymerizing ethylene with an alpha-olefin to produce LLDPE in the presence of a catalyst system comprising (1) a titanium halide containing catalyst component and (2) an organometallic cocatalyst, the improvement comprising bringing said catalyst component into contact with an activity inhibitor either (i) prior to contact with the organometallic cocatalyst, or (ii) after said catalyst component and organometallic cocatalyst have been mixed, and thereafter copolymerizing ethylene with an alpha-olefin, said activity inhibitor selected from one of C0 2 , C0, S0 2 , allene compounds, conjugated dienes and alicyclic conjugated dienes.
Claim 2
Dependent Claim
95 words
In a process for copolymerizing ethylene with an alpha-olefin to produce LLDPE in the presence of a catalyst system comprising (1) a titanium halide containing catalyst component and (2) an organometallic cocatalyst, the improvement comprising bringing said catalyst component into contact with an activity inhibitor either (i) prior to contact with the organometallic cocatalyst, or (ii) after said catalyst component and organometallic cocatalyst have been mixed, and thereafter copolymerizing ethylene with an alpha-olefin, said activity inhibitor selected from one of C0 2 , C0, S0 2 , allene compounds, conjugated dienes and alicyclic conjugated dienes.
Claim 3
Dependent Claim
101 words
A process as in claim 1 wherein the titanium halide containing catalyst component is obtained by reducing titanium tetrachloride with one of hydrogen, aluminum, or an organometallic compound selected from organo compounds of Groups I-III of the Periodic Table to yield titanium trichloride or a complex thereof, treating the titanium trichloride or its complex with an activating agent selected from one of an electron donor, halogen element or halogen-containing compound or mixtures thereof, and wherein the activity inhibitor being employed at a concentration in the range of about 0.0001 to 0.01 gram-mol for 1 gram-atom of titanium in the catalyst component.
Claim 4
Dependent Claim
125 words
A process as in claim 1 wherein the titanium halide containing component is obtained by contacting (1) metallic magnesium or a magnesium compound represented by the formula MgR 1 n R 2 2-n , wherein R and R 2 are the same or different hydrocarbon groups, OR groups, OH groups, or halogen atoms, and wherein R 3 is a hydrocarbon group which is the same or different from R and R 2 , and 0 ≤ n ≤ 2 and (2) a titanium halide compound, (3) an activating agent selected from electron donor compounds, halogen elements, halogen-containing compounds, or an organoaluminum compound and the activity inhibitor concentration is in the range of 0.001 to 1 gram-mol per 1 gram-atom of titanium in the catalyst component.
Claim 5
Dependent Claim
65 words
A process as in claim 3 wherein the titanium containing catalyst component is prepared in the presence of a metal oxide selected from B203, MgO, Al 2 O 3 , SiO 2 , CaO, TiO 2 , ZnO, ZrO 2 , SnO 2 , BaO, ThO 2 , SiO 2 -MgO, SiO 2 -Al 2 O 3 , and Si0 2 - Ti0 2 .
Claim 6
Dependent Claim
12 words
A process as in claim 1 wherein said activity inhibitor is CO.
Claim 7
Dependent Claim
12 words
A process as in claim 1 wherein the activity inhibitor is propadiene.
Claim 8
Dependent Claim
80 words
A catalyst system for copolymerizing ethylene with an alpha-olefin to produce LLDPE, said catalyst system comprising (l) a titanium halide containing catalyst component and (2) an organometallic cocatalyst, said catalyst component being treated with an activity inhibitor either (i) prior to contact with the organometallic cocatalyst or (ii) after said catalyst component and organometallic cocatalyst have been mixed, said activity inhibitor selected from one of CO 2 , C0, SO 2 , Allen compounds, conjugated dienes, and alicyclic conjugated dienes.
Claim 9
Dependent Claim
80 words
A catalyst system for copolymerizing ethylene with an alpha-olefin to produce LLDPE, said catalyst system comprising (l) a titanium halide containing catalyst component and (2) an organometallic cocatalyst, said catalyst component being treated with an activity inhibitor either (i) prior to contact with the organometallic cocatalyst or (ii) after said catalyst component and organometallic cocatalyst have been mixed, said activity inhibitor selected from one of CO 2 , C0, SO 2 , Allen compounds, conjugated dienes, and alicyclic conjugated dienes.
Claim 10
Dependent Claim
12 words
A catalyst as in claim 7 wherein the activity inhibitor is CO.
Claim 11
Dependent Claim
12 words
A catalyst as in claim 7 wherein the activity inhibitor is propadiene.
References Cited (Backward Citations)
No citation records indexed.
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