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1. WO2021064080 - CATALYSEUR DE ZIEGLER-NATTA POUR LA POLYMÉRISATION D'OLÉFINES

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS F11853

1. Use of a compound of formula (I)


wherein

Ri is C4-io-alkyl; and

R2 and R3 are each independently Ci-3-alkyl

as an internal donor in a Ziegler-Natta catalyst component in ethylene (co)polymerization.

2. Use as claimed in claim 1, wherein compound of formula (I) is selected from compounds of formula (l-a) and (l-b)

wherein

Ri is C4-io-alkyl, preferably linear or branched Cs-9-alkyl, more preferably Ri is selected from a group consisting of methylbutyl and nonyl, even more preferably Ri is selected from a group consisting of 3-methylbutyl and nonyl.

3. Use as claimed in claim 1 or 2, the Ziegler-Natta catalyst component further comprising

(ii) a compound of a transition metal Group 4 to 6 of the Periodic Table (lUPAC, Nomenclature of Inorganic Chemistry, 2005);

(iii) a compound of metal Group 1 to 3 of the Periodic Table (lUPAC, 2005); and

(iv) optionally, a compound of an element of Group 13 of the Periodic Table (lUPAC, 2005).

4. A Ziegler-Natta catalyst component comprising an internal donor selected from compounds of formula (I), preferably from compounds of formula (l-a) and (l-b).

5. The Ziegler-Natta catalyst component as claimed in claim 4 further comprising

(ii) a compound of a transition metal Group 4 to 6 of the Periodic Table (lUPAC, Nomenclature of Inorganic Chemistry, 2005);

(iii) a compound of metal Group 1 to 3 of the Periodic Table (lUPAC, 2005);

and

(iv) optionally, a compound of a element of Group 13 of the Periodic Table (lUPAC, 2005).

6. The Ziegler-Natta catalyst component as defined in claim 4 or 5 wherein the Ziegler-Natta catalyst component comprises

(ii) a Group 4 to 6 metal, preferably a Group 4, metal, more preferably Ti, content (determined by ICP Analysis) in the range of 1.0 wt% to 15.0 wt%, preferably 2.5 wt% to 12.0 wt%, more preferably 4.0 wt% to 9.0 wt% of the total weight of the Ziegler-Natta catalyst component;

(iii) a Group 1 to 3, preferably a Group 2 metal, preferably Mg, content (determined by ICP Analysis) in the range of 5.0 wt% to 30.0 wt%, preferably 9.0 wt% to 22.0 wt%, more preferably 13.0 wt% to 17.0 wt% of the total weight of the Ziegler-Natta catalyst component;

(iv) a Group 13 element, preferably Al, (determined by ICP Analysis) in the range of 0 wt% to 3.0 wt%, preferably 0 wt% to 2.6 wt%, more preferably 0 wt% to 0.7 wt% of the total weight of the Ziegler-Natta catalyst component.

7. A Ziegler-Natta catalyst component, wherein the Ziegler-Natta catalyst component is prepared by a method comprising the steps of

(M-a) providing a solid support, preferably a MgCh-based solid support, more preferably solid support particles of MgCl2*mROH adduct, wherein R in the MgCl2*mROH adduct is a linear or branched Ci-12-alkyl group, and m is 0 to 6, preferably 1 to 6;

(M-b) pre-treating the solid support of step (M-a) with a compound of Group 13 element;

(M-c) treating the pre-treated solid support of step (M-b) with a transition metal compound of Group 4 to 6;

(M-d) recovering the Ziegler-Natta catalyst component;

wherein the solid support is contacted with an internal organic compound of formula (I) or mixtures therefrom before treating the solid support in step (M-c).

8. A method for producing a Ziegler-Natta catalyst component, comprising adding an internal donor selected from compounds of formula (I)


wherein

Ri is C4-io-alkyl; and

R2 and R3 are each independently Ci-3-alkyl,

to a process of preparing the Ziegler-Natta catalyst component.

9. A Ziegler-Natta catalyst for ethylene (co)polymerization, wherein the Ziegler-Natta catalyst comprises

(A) the Ziegler-Natta catalyst component as defined in any one of claims 4 to

7;

(B) a cocatalyst selected from element compounds of Group 13 of the Periodic Table (lUPAC, 2005); and

(C) optionally, an external donor.

10. Use of the Ziegler-Natta catalyst as defined in claim 9 in polymerizing ethylene with C3-20 comonomers.

11. A method of ethylene (co)polymerization optionally with C3-20 comonomers, comprising

a) introducing into a polymerization reactor a Ziegler- Natta catalyst component comprising an internal donor of formula (I)


wherein

Ri is C4-io-alkyl, preferably linear or branched Cs-9-alkyl, more preferably Ri is selected from a group consisting of methylbutyl and nonyl, even more preferably Ri is selected from a group consisting of 3-methylbutyl and nonyl; and

R2 and R3 are each independently linear or branched Ci-3-alkyl.

12. The method as claimed in claim 11, wherein the internal donor of formula (I) is selected from compounds of formula (l-a) or (l-b)


(l-a)

(l-b)

wherein

Ri is C4-io-alkyl, preferably linear or branched Cs-9-alkyl, more preferably Ri is selected from a group consisting of methylbutyl and nonyl, even more preferably Ri is selected from a group consisting of 3-methylbutyl and nonyl.

13. The method as claimed in claim 11 or 12, wherein the internal donor is comprised in a Ziegler-Natta catalyst component further comprising

(ii) a transition metal compound of Group 4 to 6 of the Periodic Table (lUPAC, Nomenclature of Inorganic Chemistry, 2005);

(iii) a metal compound of Group 1 to 3 of the PeriodicTable (lUPAC, 2005);

and

(iv) optionally, a compound of group 13 of the Periodic Table (lUPAC, 2005).

14. A process for producing ethylene homo- or copolymers, comprising the steps of

(P-a) introducing a Ziegler-Natta catalyst component, comprising

(i) an internal donor selected from compounds of formula (I), preferably from formulas (l-a) and (l-b)

wherein

Ri is C4-io-alkyl, preferably linear or branched Cs-9-alkyl, more preferably Ri is selected from a group consisting of methylbutyl and nonyl, even more preferably Ri is selected from a group consisting of 3-methylbutyl and nonyl; and

R2 and R3 are each independently linear or branched Ci-3-alkyl;

(ii) a transition metal compound of Group 4 to 6 of the Periodic Table (lUPAC, Nomenclature of Inorganic Chemistry, 2005);

(iii) a metal compound of Group 1 to 3 of the PeriodicTable (lUPAC, 2005);

and

(iv) optionally, a compound of group 13 of the Periodic Table (lUPAC, 2005)

into a polymerisation reactor,

(P-b) introducing a cocatalyst capable of activating the said Ziegler- Natta catalyst component into the polymerisation reactor;

(P-c) introducing ethylene, optionally C3-C20 a-olefin comonomers, and optionally hydrogen into the polymerisation reactor; and

(P-d) maintaining said polymerisation reactor in such conditions as to produce an ethylene homo- or copolymer.

15. A process as claimed in claim 14, wherein (co)polymerizing ethylene is accomplished in a multi-stage polymerization process comprising at least one gas phase reactor for producing ethylene (co)polymers;

16. A process as claimed in claim 14, wherein (co)polymerizing ethylene is accomplished in a multi-stage polymerization process comprising at least one slurry reactor, preferably two slurry reactors, and one gas phase reactor.