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:
May. 10, 2005
Filed:
Mar. 25, 2003
Shinji Abe, Tokyo, JP;
Shotaro Matsuda, Ichihara, JP;
Satoru Ohtani, Ichihara, JP;
Hiroto Nishida, Ichihara, JP;
Michiharu Sakata, Ichihara, JP;
Tomohiro Arase, Ichihara, JP;
Shinji Abe, Tokyo, JP;
Shotaro Matsuda, Ichihara, JP;
Satoru Ohtani, Ichihara, JP;
Hiroto Nishida, Ichihara, JP;
Michiharu Sakata, Ichihara, JP;
Tomohiro Arase, Ichihara, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
A process for producing a polyolefin according to the present invention comprises (co) polymerizing one or two or more α-olefins in a vapor phase in a fluidized-bed reactor, wherein the concentration of (A) a saturated aliphatic hydrocarbon in the fluidized bed reactor is 1 mol % or more and at least one compound selected from (B) an aliphatic amide and (C) a nonionic surfactant constituted only of carbon, oxygen and hydrogen atoms is made to exist in the reactor. The present invention can provide a process for producing a polyolefin, the process ensuring that the prevention of clogging caused by the generation of sheet or block polymers and a high efficiency of the production of a polyolefin due to good catalytic activity can be accomplished at the same time and also having superb continuous productivity.