US 6,642,325 B2 · Silica gel-supported catalyst component for ethylene (co)polymerization, catalyst therefrom and use of the same

Abstract

The present invention relates to a silica gel-supported catalyst component suitable for ethylene (co)polymerization, a catalyst therefrom and use of the same. The catalyst component according to the present invention is obtained by supporting the reaction product of a titanium compound, a halide promoter, a magnesium compound and an electron donor on silica gel having a larger specific surface area. When the resultant catalyst is used for ethylene polymerization, especially gas phase fluidized bed polymerization, not only the activity is substantially enhanced, but also the hydrogen response and the copolymerizability of ethylene with other alpha-olefins are improved. The catalyst is especially suitable for the fluidized bed polymerization operated in a condensed state, with high quality LLDPE resins being obtained.

Claims18

Dependent claims

A supported catalyst component comprising:

(i) a titanium-containing active component comprising the reaction product of:
a) at least one titanium compound;
b) at least one magnesium compound, wherein the magnesium compound is represented by the following general formula:
MgX2
wherein X is Cl, Br, I or combinations thereof
c) at least one halide promoter;
d) at least one electron donor;
and
(ii) a porous inert carrier material, wherein said porous inert carrier material is spherical or spheroidal silica gel having an average particle size of 10 to 100 microns and a specific surface area of 300 to 1000 m2/g, said active component being supported on the carrier material.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/935,333Filed 22 Aug 2001

Priority

CN 00123560 A22 Aug 2000

Published

US 2002/0065378 A130 May 2002

Granted

4 Nov 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

C08F 10/02
Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond: ethene
Y02P 20/52
Improvements relating to the production of bulk chemicals: using catalysts, e.g. selective catalysts
Y10S 526/901
Synthetic resins or natural rubbers -- part of the class 520 series: monomer polymerized in vapor state in presence of transition metal containing…
C08F
Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Silica gel-supported catalyst component for ethylene (co)polymerization, catalyst therefrom and use of the same

Life of this patent

Silica gel-supported catalyst component for ethylene (co)polymerization, catalyst therefrom and use of the same

Life of this patent

Abstract

Claims18