The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 2002
Filed:
Aug. 03, 2000
Applicant:
Inventor:
Fumio Okuda, Ishihara, JP;
Assignee:
Idemitsu Petrochemical Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F 4/42 ;
U.S. Cl.
CPC ...
C08F 4/42 ;
Abstract
The invention provides a catalyst comprising a transition metal compound which has a nitrogen-containing tridentate ligand and of which the transition metal is of Groups 8 to 10 of the Periodic Table, and an organoaluminium compound, the catalyst of the invention has high activity. In the method of using the catalyst for producing polyolefins, of which the advantages are that the catalysts do not require methylaluminoxane which is expensive and difficult to handle, and of which storage stability is poor, and is extremely dangerous. The invention realizes efficient production of polyolefins (especially polyethylene) on an industrial scale.