Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1997-04-21
1999-08-31
Bell, Mark L.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502110, 502114, 502115, 502116, 502125, 502132, 502133, 526119, 526128, 526 144, B01J 3100, B01J 3700
Patent
active
059453664
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a solid catalyst component for polymerization of olefins and a catalyst for polymerization of olefins prepared from said solid catalyst component. More particularly, the present invention relates to a solid catalyst component for polymerization of olefins and a catalyst which exhibit an excellent polymerization activity when used for the polymerization of propylene and can provide a polymer having the desired stereoregularity or crystallinity stably in a high yield without changing the polymerization parameter and can easily control the stereoregularity or crystallinity of the polymer thus prepared.
TECHNICAL BACKGROUND
Many proposals have been made and known for a solid catalyst component comprising a titanium halide compound, a magnesium compound and an electron donor compound as essential components and a process for the polymerization of olefins in the presence of a catalyst comprising said solid catalyst component, an organic aluminum compound and a third component such as a silicon compound.
Further, a solid catalyst component prepared from a dialkoxymagnesium and titanium tetrachloride as main starting materials and a catalyst for polymerization of olefins made of said solid catalyst component, an organic aluminum compound and a third component such as a silicon compound have been known as disclosed in JP-A-63-3010 (The term "JP-A" as used herein means an "unexamined published Japanese patent application"), JP-A-1-221405, JP-A-1-315406, JP-A-3-227309, JP-A-3-70711, JP-A-4-8709, and many other references.
On the other hand, various proposals have been made for a solid catalyst component comprising a halogenated aluminum compound, a magnesium compound and halogenated titanium compound as essential components and a catalyst for polymerization of olefins made of said solid catalyst component, an organic aluminum compound and a third component such as an organic acid ester or silicon compound. For example, JP-A-55-161807 proposes a composition obtained by a process which comprises co-grinding magnesium chloride, an organic acid ester, a halogenated hydrocarbon compound and a halogenated aluminum compound, and then subjecting the mixture to heat treatment with titanium tetrachloride. The above cited publication also proposes a catalyst formed by an organic aluminum compound and an organic acid ester. JP-A-61-31402 discloses a catalyst made of a solid catalyst component obtained by a process which comprises reacting a reaction product of a halogenated aluminum compound and a silicon compound with a magnesium compound, and then reacting the reaction product with a halogenated titanium compound and a phthalic acid ester, an organic aluminum compound and silicon compound.
Moreover, various proposals have been made for a solid catalyst component comprising an alkoxyaluminum compound, a magnesium compound and a halogenated titanium compound as essential constitution components and a catalyst for polymerization of olefins made of said solid catalyst component, an organic aluminum compound and a third component such as an organic acid ester or silicon compound. For example, JP-A-57-145104 proposes a catalyst component obtained by a process which comprises co-grinding magnesium chloride, an organic acid ester and an alkoxyaluminum compound, and then subjecting the mixture to heat treatment with titanium tetrachloride. JP-A-1-245002 discloses a catalyst made of a solid catalyst component obtained by a process which comprises bringing a diethoxymagnesium and titanium tetrachloride into contact with each other, adding a trialkoxyaluminum to the mixture, and then reacting the mixture with phthalic acid dichloride, an organic aluminum compound and an epoxy p-methane compound.
The foregoing various techniques focus on the development of a catalyst component which is active enough to allow the omission of a so-called deashing step, i.e., step of removing catalyst residues such as chlorine and titanium remaining in the polymer produced by the polymerization of propylene
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Goto Kenji
Kataoka Takuo
Umebayashi Hidetoshi
Bell Mark L.
Pasterczyk J.
Toho Titanium Co., Ltd.
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