Appeal No. 95-0996
Application 07/943,025
remaining claims in this application, stand withdrawn from
consideration as being directed to a nonelected invention
(main brief, page 1).
According to appellants, the invention is directed to the
preparation of Ziegler-Natta catalysts, followed by treatment
with carbon dioxide to completely inactivate the catalyst so
that the catalyst can be stored for prolonged periods with
subsequent reactivation by reaction with a cocatalyst (main
brief, paragraph bridging pages 1 and 2). Claims 1 and 2 are
reproduced below:
1. A process for the preparation of a deactivated
Ziegler-Natta catalyst system with a long storage life,
suitable upon reactivation, for the preparation of polymers of
propylene and
of polymers of propylene together with other "-olefins
containing, as active components,
a) a titanium-containing solid component which contains
titanium, magnesium, halogen and a carboxylic ester
and, as a cocatalyst,
b) an aluminum compound and
c) a further election [sic, electron] donor, which
comprises reacting components a), b), and c), wherein,
after the reaction, the reaction mixture is deactivated
by reaction with carbon dioxide.
2. A Ziegler-Natta catalyst system prepared by a process
as claimed in claim 1.
The examiner has relied upon the following reference as
2
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