Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1991-04-29
1992-05-19
Garvin, Patrick P.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502112, 502115, 502116, 502121, 502125, 502128, 526128, C08F 4654
Patent
active
051148960
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
This invention relates to a process for the production of a catalytic component for the polymerization of olefins.
TECHNICAL BACKGROUND
The so-called magnesium support type catalytic component for the polymerization of olefins, obtained by contacting a transition metal compound such as titaniium compound with a magnesium compound, has been known.
The inventors have proposed a catalytic component which is obtained by contacting metallic magnesium, a halogenated hydrocarbon and a compound represented by the general formula X.sub.n M(OR).sub.m-n to obtain a magnesium-containing solid and contacting the magnesium-containing solid with a halogen-containing alcohol and then with a titanium compound (Japanese Patent Laid-Open Publication No. 162703/1988). This catalytic component exhibits a high catalytic activity, but forms a polymer containing somewhat more low molecular weight components, causing a problem that fuming takes place during processing the polymer. Thus, as occasion demands, it is required to remove the low molecular weight components in the polymer before processing.
DISCLOSURE OF THE INVENTION
The inventors have made various studies on the provision of a catalytic component capable of producing an olefin polymer with less low molecular weight components in a high yield and consequently have found that the object of the present invention can be achieved by a catalytic component which is obtained by, in the process for the preparation of the catalytic component the inventors have proposed, contacting the contacted product with a halogen-containing alcohol with a titanium compound and solid halogenated hydrocarbon. The present invention is based on this finding.
That is to say, the gist of the present invention consists in a process for the production of a catalytic component for the polymerization of olefins, which comprises contacting (a) metallic magnesium, (b) a halogenated hydrocarbon represented by the general formula RX wherein R is an alkyl group, aryl group or cycloalkyl group having 1 to 20 carbon atoms and (c) a compound represented by the general formula X.sup.1.sub.n M(OR.sup.1).sub.m-n in which X.sup.1 is a hydrogen atom, a halogen atom or a hydrocarbon group of 1 to 20 carbon atoms, M is boron, carbon, aluminum, silicon or phosphorus atom, R.sup.1 is a hydrocarbon group of 1 to 20 carbon atoms, m is the atomic valence of M and m>n.gtoreq.0 to obtain a magnesium-containing solid, contacting the magnesium-containing solid with (c) a halogen-containing alcohol and then contacting with (d) a titanium compound and (e) a solid halogenated hydrocarbon.
BEST EMBODIMENT FOR CARRYING OUT THE INVENTION
Raw Materials for Preparation of Catalytic Component
(a) Metallic Magnesium
Any metallic magnesium can be used, but in particular, powdered and chipped ones are suitable. Before use, these metallic magnesiums are preferably washed with an inert hydrocarbon such as saturated aliphatic, alicyclic hydrocarbons or aromatic hydrocarbons of 6 to 8 carbon atoms and heated and dried in the presence of an inert gas such as nitrogen, etc.
(b) Halogenated Hydrocarbons
Preferably, the halogenated hydrocarbons represented by the general formula RX are chlorinated or brominated hydrocarbons wherein R is an alkyl group, aryl group or cycloalkyl group of 1 to 8 carbon atoms. Examples of such a halogenated hydrocarbon are methyl, ethyl, isopropyl, n-butyl, n-octyl and cyclohexyl chlorides and bromides, chlorobenzenes, o-chlorotoluene, etc.
(c) Compound of General Formula X.sup.1.sub.n M(OR.sup.1).sub.m-n
In this formula, M, X.sup.1, R.sup.1, m and n have the same meaning as described above. X.sup.1 may be a hallogen-substituted hydrocarbon group of 1 to 20 carbon atoms. When X.sup.1 is a hydrocarbon group, X.sup.1 and R.sup.1 may be same or different. Hereinafter, the compound of the above described general formula will be referred to as the alkoxy compound merely.
Examples of the hydrocarbon group are alkyl groups such as methyl, ethyl, propyl, i-propyl, b
REFERENCES:
patent: 4814311 (1989-03-01), Murata et al.
patent: 4814312 (1989-03-01), Murata et al.
patent: 4814313 (1989-03-01), Murata et al.
patent: 4950630 (1990-08-01), Murata et al.
patent: 4960743 (1990-10-01), Murata et al.
Imai Masafumi
Kanazawa Seizaburo
Murata Masahide
Nakano Akira
Yashiro Teruo
Garvin Patrick P.
Tonen Corporation
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