US 5,854,164 AGranted

Method for preparing catalyst component for olefin polymerization, catalyst for olefin polymerization and process for producing olefin polymer with the catalyst

AssigneeSumitomo Chemical Company, Limited

InventorsHiroyuki Shiraishi, Eiji Nakaishi, Takahiro Hino, Akio Imai

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Abstract

A solid catalyst component (A) for olefin polymerization comprising Mg, Ti, a halogen and a cyclic organic nitrogen compound (C), a solid catalyst comprising the solid catalyst component and an organoaluminum compound, and a process for producing an olefin polymer with the catalyst. According to the present invention, there can be provided an olefin polymerization catalyst having a high catalyst activity per titanium enough to make the removal of catalyst residues unnecessary and a process for producing an olefin polymer having a low content of low molecular weight component with the catalyst.

Claims13

Dependent claims

A method for preparing a solid catalyst component for olefin polymerization consisting of reacting a solid catalyst component precursor (D) containing Mg, Ti and OR group (wherein R represents a hydrocarbon group having 1 to 20 carbon atoms) with:

a mixture of a cyclic organic nitrogen compound (C) and a titanium compound (E) having at least one Ti-halogen bond;
a mixture of a cyclic organic nitrogen compound (C), a titanium compound (E) having at least one Ti-halogen bond and an electron donative compound;
a cyclic organic nitrogen compound (C) and a titanium compound (E) having at least one Ti-halogen bond successively;
or
a cyclic organic nitrogen compound (C) and a mixture of a titanium compound (E) having at least one Ti-halogen bond and an electron donative compound successively, wherein the cyclic organic nitrogen compound (C) is selected from the group consisting of piperidine, N-methylpiperidine, 2,6-dimethylpiperidine, 3,5-dimethylpiperidine, N-methyl-2,6-dimethylpiperidine, N-methyl-3,5-dimethylpiperidine, 2,2,6-trimethylpiperidine, 2,2,6,6-tetramethylpiperidine. N-methyl-2,2,6,6-tetramethylpiperidine, 2,2,4,6,6-pentamethylpiperidine, 4-acetyloxy-2,2,6,6-tetramethylpiperidine and compounds represented by the following formulae ##STR3##

2 more elements

A catalyst for olefin polymerization consisting of:

(I) a solid catalyst component (A) is prepared by reacting a solid catalyst component precursor (D) containing Mg, Ti and OR group (wherein R indicates a hydrocarbon group having 1 to 20 carbon atoms) with a mixture of a cyclic organic nitrogen compound (C) and a titanium compound (E) having at least one Ti-halogen bond or a mixture of a cyclic organic nitrogen compound (C), a titanium compound (E) having at least one Ti-halogen bond and an electron donative compound, or with a cyclic organic nitrogen compound (C) and a titanium compound (E) having at least one Ti-halogen bond, successively or a cyclic organic nitrogen compound (C) and a mixture of a titanium compound (E) having at least one Ti-halogen bond and an electron donative compound, successively;
and
(II) an organoaluminum compound (B), wherein the cyclic organic nitrogen compound (C) is selected from the group consisting of piperidine, N-methylpiperidine, 2,6-dimethylpiperidine, 3,5-dimethylpiperidine, N-methyl-2,6-dimethylpiperidine, N-methyl-3,5-dimethylpiperidine, 2,2,6-trimethylpiperidine, 2,2,6,6-tetramethylpiperidine, N-methyl-2,2,6,6-tetramethylpiperidine, 2,2,4,6,6-pentamethylpiperidine, 4-acetyloxy-2,2,6,6-tetramethylpiperidine and compounds represented by the following formulae. ##STR4##

Dependencies are inferred from the claim text.