Process for producing olefin polymer

Details Process for producing olefin polymer Process for producing olefin polymer

2011-06-14

2011-06-14

Wu, David (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S115000, C526S141000, C526S905000, C585S255000

Reexamination Certificate

active

07960486

ABSTRACT:
The purpose of the present invention is provite a process for producing an olefin polymer, which can produce an olefin polymer having a higher molecular weight even in the presence of hydrogen and can obtain an olefin polymer having good powder characteristics by lowering hydrogen concentration efficiently in polymerizing an olefin in the presence of hydrogen by use of a gas phase reaction vessel. There is provided a process for producing an olefin polymer comprising the steps of: using a gas phase reaction vessel; polymerizing an olefin by use of a catalyst for olefin polymerization in the presence of hydrogen; adding a hydrogenation catalyst into the gas phase reaction vessel; and adding a polymerization activity depressant.

REFERENCES:
patent: 4851488 (1989-07-01), Burstain
patent: 6288178 (2001-09-01), Jacobsen
patent: 2010/0036070 (2010-02-01), Aso et al.
patent: 8-151408 (1996-06-01), None
patent: 10-204123 (1998-08-01), None
patent: 10204123 (1998-08-01), None

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