Magnesium dichloride-alcohol adducts and catalyst components obtained there-from

Patent metadata

Field	Value
Publication number	US-9765161-B2
Application number	US-201314654201-A
Country	US
Kind code	B2
Filing date	Dec 11, 2013
Priority date	Dec 20, 2012
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

Spherical adducts comprising a MgCl 2 , an alcohol ROH in which R is a C 1 -C 10 hydrocarbon group, present in a molar ratio with MgCl 2 ranging from 0.5 to 6 and less than 20% mol based on the mol of MgCl 2 of a compound of formula Mg(OR 1 ) 2 in which R 1 is selected from C 1 -C 10 alkyl groups or R 2 CO groups in which R 2 is selected from C1-C6 alkyl or aryl groups.

First claim

What is claimed is:

1. A solid adduct comprising MgCl 2 , an alcohol ROH in which R is a C 1 -C 10 hydrocarbon group present in a molar ratio with MgCl 2 of 0.5 to 6, and greater than 1% mol of a compound of formula Mg(OR 1 ) 2 , in which R 1 is selected from C 1 -C 10 alkyl groups or R 2 CO groups in which R 2 is selected from C 1 -C 6 alkyl or aryl groups.

2. The solid adduct of claim 1 , in which the compound Mg(OR 1 ) 2 is present in an amount lower than 15% based on the mol of MgCl 2 .

3. The solid adduct of claim 1 , in which the Mg(OR 1 ) 2 compound is selected from those in which R 1 is a C 1 -C 6 linear or branched alkyl.

4. The solid adduct of claim 1 , in which the Mg(OR 1 ) 2 compound is selected from those in which R 1 is a C 3 -C 5 branched alkyl.

5. The solid adduct of claim 1 , in which the Mg(OR 1 ) 2 compound is selected from compounds in which R 1 is R 2 CO with R 2 being a C 1 -C 4 alkyl group.

6. The solid adduct of claim 5 , in which R 2 is methyl.

7. The solid adduct of claim 1 , in which R is chosen among C 1 -C 8 linear or branched hydrocarbon groups.

8. The solid adduct of claim 1 , in which the number of moles of alcohol per mole of MgCl 2 ranges from 0.8 to 4.

9. A method for forming a catalyst component comprising reacting the solid adduct of claim 1 with a transition metal compound of Groups IV-VI of the Periodic Table of Elements.

10. The method of claim 9 , wherein the catalyst component is reacted with an Al-alkyl compound optionally in the presence of an external electron donor compound for the polymerization of alpha-olefins CH 2 ═CHR, wherein R is hydrogen or a hydrocarbon radical having 1-12 carbon atoms.

11. The solid adduct of claim 1 , comprising 1-4% mol of a compound of formula Mg(OR 1 ) 2 .

Assignees

• Basell Poliolefine Italia Srl

Inventors

• Gaddi Benedetta
• Collina Gianni
• Evangelisti Daniele

Classifications

• C08F4/6543

  halides of magnesium · CPC title

• C08F4/6548

  magnesium or compounds thereof, not provided for in C08F4/6543 or C08F4/6546 · CPC title

• C07F3/02

  Magnesium compounds · CPC title

• C08F110/06 Primary

  Propene · CPC title

• C08F4/651

  Pretreating with non-metals or metal-free compounds · CPC title