Claims
- 1. A component of catalysts for the polymerization of olefins and which is the product obtained by contacting ( 1) a titanium compound with a support consisting of a mixture of (2) an anhydrous Mg dihalide and (3) an anhydrous compound of a metal belonging to one of Groups I and II of said Periodic Table, the anhydrous Mg dihalide (2) being in an active state such that it has a surface area exceeding 3 m.sup.2 /g, or in its X-rays spectrum the diffraction line which is most intense in the X-rays powder spectrum of the normal, non-active Mg dihalide is less intense, the anhydrous compound of the Group I or Group II metal (3) being different from an anhydrous Mg dihalide, non-reactive with the anhydrous Mg dihalide under the conditions of preparing the catalyst, selected from the group consisting of lithium chloride, sodium chloride, sodium bromide, beryllium chloride, calcium chloride, strontium chloride, cadmium bromide, cuprous chloride, mercury(ic) chloride, sodium sulphate, sodium carbonate, zinc oxide, beryllium oxide, borax, calcium sulphate, calcium carbonate, beryllium sulphate, calcium stearate and sodium vinylsulphonate, and present in the mixture of (2) and (3) in an amount of from 30% to 70%.
- 2. Catalysts for the polymerization of olefins and obtained by mixing, as starting catalyst-forming components:
- (a) a hydride or organometallic compound of a metal belonging to one of Groups I to III of the Mendelyeev Periodic Table and
- (b) the product obtained by contacting (1) a titanium compound with a support consisting of a mixture of (2) an anhydrous Mg dihalide and (3) an anhydrous compound of a metal belonging to one of Groups I and II of said Periodic Table, the anhydrous Mg dihalide (2) being in an active state such that it has a surface area exceeding 3 m.sup.2 /g, or in its X-rays spectrum the diffraction line which is most intense in the X-rays powder spectrum of the normal, non-active Mg dihalide is less intense, the anhydrous compound of the Group I or Group II metal (3) being different from component (a) or the anhydrous compound of the Group II metal being different from an anhydrous Mg dihalide, non-reactive with the anhydrous Mg dihalide under the conditions of preparing the catalyst, selected from the group consisting of lithium chloride, sodium chloride, sodium bromide, beryllium chloride, calcium chloride, strontium chloride, cadmium bromide, cuprous chloride, mercury(ic) chloride, sodium sulphate, sodium carbonate, zinc oxide, beryllium oxide, borax, calcium sulphate, calcium carbonate, beryllium sulphate, calcium stearate and sodium vinylsulphonate, and present in the mixture of (2) and (3) in an amount of from 30% to 70%.
- 3. Catalysts according to claim 2, component (b) of which is obtained by co-grinding the Ti compound (1) with the mixture of (2) and (3), for grinding times and under grinding conditions such that the anhydrous Mg dihalide (2) is converted to the active form.
- 4. Catalysts according to claim 3, in which the anhydrous Mg dihalide (2) is MgCl.sub.2 or MgBr.sub.2.
- 5. Catalysts according to claim 2, component (b) of which is obtained by contacting the Ti compound (1) with a mixture of the anhydrous Mg dihalide (2) in preactivated form and the anhydrous compound of the Group I or Group II metal (3).
- 6. Catalysts according to claim 5, component (b) of which is obtained by contacting the Ti compound (1) with a mixture of anhydrous Mg dihalide (2) preactivated by grinding and the anhydrous compound of the Group I or Group II metal (3).
- 7. Catalysts according to claim 5, in which the anhydrous Mg dihalide is MgCl.sub.2 or MgBr.sub.2.
- 8. Catalysts according to claim 2, component (b) of which is obtained by contacting the Ti compound (1) with a mixture of anhydrous Mg dihalide (2) obtained in the active form by disproportionation of a Grignard reagent having the general formula RMgX in which R is a hydrocarbon radical and X is halogen, and the anhydrous compound of the Group I or Group II metal (3).
- 9. Catalysts according to claim 8, in which the active anhydrous Mg dihalide is MgCl.sub.2 or MgBr.sub.2.
- 10. Catalysts according to claim 2, component (b) of which is obtained by contacting the Ti compound (1) with a mixture of anhydrous Mg dihalide (2) obtained in the active form by treating a Grignard reagent having the formula RMgX in which R is a hydrocarbon radical and X is halogen with gaseous hydrogen chloride, and the anhydrous compound of the Group I or Group II metal (3).
- 11. A catalyst according to claim 10, in which the active anhydrous Mg dihalide is MgCl.sub.2 or MgBr.sub.2.
- 12. Catalysts according to claim 2, component (b) of which is obtained by contacting the Ti compound (1) with a mixture of anhydrous Mg dihalide obtained in the active form by thermal decomposition, under reduced pressure, of an addition compound of the corresponding normal, non-active Mg dihalide and a Lewis base or acid, and the anhydrous compound of the Group I or Group II metal (3).
- 13. Catalysts according to claim 12, in which the active anhydrous Mg dihalide is MgCl.sub.2 or MgBr.sub.2.
- 14. Catalysts according to claim 2, in which the amount of the Ti compound (1) used in preparing component (b) is from 0.01% to 30% by weight, on the weight of the mixture of (2) and (3).
- 15. Catalysts according to claim 2, in which the amount of the Ti compound (1) used in preparing component (b) is from 1% to 10% by weight, on the weight of the mixture of (2) and (3).
- 16. Catalysts according to claim 2, component (a) of which is a hydride or alkyl compound of aluminum.
- 17. Catalysts according to claim 2, component (a) of which is an aluminum trialkyl.
- 18. A process for polymerizing ethylene and mixtures thereof with alpha-olefins and/or diolefins, characterized in that the monomeric material is polymerized in contact with a catalyst according to claim 2.
- 19. The process according to claim 18, further characterized in that the polymerization of the monomeric material is carried out at a temperature of -80.degree. C. to +200.degree. C., in the presence of a conventional regulator of the molecular weight of the polymer produced, and the polymer obtained is useful as such without requiring purifying treatments for the removal of catalyst residues therefrom.
- 20. The process according to claim 19, further characterized in that the monomeric material is polymerized in an inert liquid diluent.
- 21. The process according to claim 19, further characterized in that the monomeric material is polymerized in the substantial absence of an inert liquid diluent.
- 22. The process of claim 18, in which the monomeric material polymerized is ethylene.
Priority Claims (1)
Number |
Date |
Country |
Kind |
27627 A/70 |
Jul 1970 |
ITX |
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Parent Case Info
This is a continuation of application Ser. No. 811,974 filed June 30, 1977, now abandoned, which in turn is a continuation-in-part of Ser. No. 579,861, filed Apr. 17, 1975 (now abandoned), which in turn is a continuation of Ser. No. 412,507 filed Nov. 2, 1973 (now abandoned) which in turn is a continuation of Ser. No. 164,008 filed July 19, 1971 (now abandoned).
US Referenced Citations (7)
Foreign Referenced Citations (6)
Number |
Date |
Country |
1905583 |
Sep 1969 |
DEX |
1958488 |
May 1970 |
DEX |
1958046 |
Jun 1970 |
DEX |
2135884 |
Jan 1972 |
DEX |
925729 |
May 1963 |
GBX |
1140649 |
Jan 1969 |
GBX |
Continuations (3)
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Number |
Date |
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Parent |
811974 |
Jun 1977 |
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Parent |
412507 |
Nov 1973 |
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Parent |
164008 |
Jul 1971 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
579861 |
Apr 1975 |
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