Basf Aktiengesellschaft

Erich Kolk

Guido Funk

Robert Bachl

Hans Frielingsdorf

Heinz Mueller-Tamm

Guenther Schweier

Wolfgang Gruber

Hans Gropper

Karl-Heinz Fauth

Andreas Deckers

Roger G Klimesch

Rainer Hemmerich

Hans-Joachim Muller

Hans Schick

Dieter Oeder

Joachim Krobb

Gunther Isbarn

Heinz Plaumann

Eckehardt Wistuba

Gunther Schweier

Peter Hennenberger

Rudolf Mueller-Mall

Friedrich Urban

Patrik Muller

Peter Kolle

Godofredo Follmer

Heinrich Mohr

Eckehardt Witsuba

Rudolf Herbeck

Dieter Volmer

Juergen Schwind

The present invention relates to high molecular weight homopolymers and copolymers of ethene, which homopolymer or copolymer is obtained by polymerizing the monomer(s) at a temperature of from 70.degree. to 150.degree. C. and under a pressure of from 2 to 150 bar in contact witha chromium trioxide catalyst,

High molecular weight homopolymers and copolymers of ethene

A process for the preparation of Ziegler-Natta type catalyst systems, containing, as active constituents a) a titanium-containing solid component, which contains in addition to a compound of titanium at least one electron donor compound, and is present in an inert solvent in the form of a suspension, and, as co-catalyst, b) an aluminum compound and c) optionally further electron donor compounds in which, following the preparation of the titanium-containing solid component a), the inert solvent present in the suspension is removed by first filtering the suspension in a first step, and then removing further solvent from the filtered material in a second step by applying a pressure difference at temperatures of not more than 100.degree. C.

Preparation of Ziegler-Natta type catalyst systems

Carboxyl-containing isobutene copolymers are obtainable

Carboxyl-containing isobutene copolymers

In a novel process for the preparation of a supported catalyst for the polymerization of .alpha.-olefins, a carrier gel (1) is first prepared by a method in which a sodium or potassium waterglass solution is introduced into a stream of an aqueous mineral acid which is subjected to angular momentum and may contain aluminum ions, longitudinally and tangentially to the stream, the resulting silica hydrosol sprayed in the form of drops into a gaseous medium and allowed to solidify into a hydrogel, and the resulting hydrogel is freed from salts by washing without prior aging and, if necessary, freed from some of the water by extraction with alcohols and/or ketones and is then dried. This gives the carrier gel (1), which is milled and is fractionated according to particle size. In a second process step, the carrier gel (1) is laden with chromium trioxide or with a chromium compound which can be converted into chromium trioxide, after which the resulting chromium-containing carrier gel (2) is heated at from 400.degree. to 1100.degree. C. for from 10 to 1,000 minutes in an anhydrous gas stream containing oxygen in a concentration of more than 10% by volume. In the novel process, it is essential that the drying of the hydrogel be carried out with formation of the carrier gel (1) in a fast dryer in the course of not more than 300 seconds at an inlet temperature of from 200.degree. to 600.degree. C. The supported catalyst prepared in this manner gives homo- and copolymers of ethylene having excellent low temperature impact strength.

Process for the preparation of a supported catalyst for the

The present invention relates to a novel catalyst for the preparation of high molecular weight homopolymers and copolymers of ethene, which catalyst is obtainable by

Catalyst for the preparation of high molecular weight homopolymers and

A process for the continuous preparation of finely divided homopolymers and copolymers of ethene by catalytic polymerization in a circular tube reactor using a liquid alkane as reaction medium in which the ethene or ethene/comonomer mixture to be polymerized is present in dissolved form and the polymer formed is present in suspended form and running the reaction mixture as a cycle stream to which the feed materials are added by bleeding in and from which the polymer formed is withdrawn by bleeding out reaction mixture, comprising (a) maintaining the mean concentration C.sub.m of polymer in the cycle stream at a value within a certain range and (b) effecting the bleeding out of reaction mixture at a point of the cycle stream at which the concentration of polymer has a value which is lower than the mean concentration C.sub.m by a distinct and definite amount.

Preparation of finely divided homopolymers and copolymers of ethene

The conversion is increased in the preparation of polyisobutylene by polymerization of isobutylene in a polymerization zone at from 0.degree. to -130.degree. C. in the presence of from 0.01 to 1.0% by weight of a boron trifluoride catalyst, from 0.001 to 1.0% by weight of a molecular weight regulator and from 30 to 90% by weight of a low-boiling solvent which is inert under the reaction conditions, by a process in which the content of but-1-ene in the monomeric isobutylene is kept constant at from 1.9 to 2.1, in particular 2.0, % by weight.

Polymerization of isobutylene

An apparatus for carrying out polymerizations from the gas phase comprising a sealable reactor with a spiral stirrer which is rotatable in the reactor about a vertical axis to generate circulatory streams of the materials employed, in which the stirrer rotating within the reactor is surmounted by a stirrer rod, which extends upward beyond the uppermost flight circle of the stirrer and is attached to the stirrer at a certain distance from the axis of the stirrer, the distance of the side face of the stirrer rod from the reactor wall is at least 10 mm, and the surface of revolution of the moving rod matches the contour of the reactor in this zone.

Apparatus for carrying out polymerizations from the gas phase

Manufacture of polymers of .alpha.-monoolefins by polymerization with a Ziegler catalyst system comprising (1) a catalyst component containing titanium and/or vanadium and (2) a particular compound of the metals aluminum, magnesium or zinc. The characteristic feature of the process according to the invention is that the catalyst component (1) containing titanium and/or vanadium is the solid-phase product (VII) contained by first (1.1) bringing a finely divided porous inorganic oxidic material (I), which has the formula Al.sub.2 O.sub.3 or SiO.sub.2.aAl.sub.2 O.sub.3, where a is a number from 0 to 2, into contact with an aluminum compound (II) dissolved in an organic solvent, to form a solid-phase product (III), then (1.2) bringing the solid-phase product (III) obtained in stage (1.1) into contact with a magnesium compound (IV), dissolved in an organic solvent, to form a solid-phase product (V), and finally (1.3) bringing the solid-phase product (V) obtained in stage (1.2) into contact with a compound (VI) of the transition metals titanium and/or vanadium to form a solid-phase product (VII). This process functions better than comparable conventional processes.

Manufacture of olefin polymers

A process for the manufacture of homopolymers and copolymers of .alpha.-monoolefins of 2 to 6 carbon atoms by polymerizing the monomer or monomers by means of a Ziegler catalyst system comprising (1) a catalyst component containing titanium and (2) a particular compound of aluminum, magnesium or zinc, the atomic ratio of titanium from catalyst component (1) to metal (Me) from catalyst component (2) being from 1 : 0.1 to 1 : 500, wherein the titanium-containing catalyst component (1) employed is the solid-phase product (VI) obtained by (1.1) first bringing into contact (1.1.1) a particular finely divided, porous, inorganic oxidic material (I) and (1.1.2) a particular aluminum compound (II) dissolved in an organic solvent, to form a solid-phase product (III) and (1.2) then bringing into contact (1.2.1) the solid-phase product (III) obtained from stage (1.1) and (1.2.2) a solution (IV) which is obtained on bringing together (IVa) 100 parts by weight of a particular alcohol, (IVb) from 0.01 to 6 parts by weight (calculated as titanium) of a titanium trihalide and (IVc) from 0.01 to 4 parts by weight (calculated as magnesium) of a magnesium compound which is soluble in the alcohol (IVa), to form a dispersion (V), and evaporating the dispersion (V) until it has a dry consistency, thus forming the solid-phase product (VI). The new process is particularly advantageous for the manufacture of homopolymers and copolymers having, for example, particularly advantageous morphological properties.

Manufacture of homopolymers and copolymers of .alpha.-monoolefins

A process for the manufacture of homopolymers and copolymers of .alpha.-monoolefins of 2 to 6 carbon atoms by polymerizing the monomer or monomers by means of a Ziegler catalyst system comprising (1) a catalyst component containing titanium and (2) a particular compound of the metals aluminum, magnesium or zinc, the atomic ratio of titanium from catalyst component (1) to metal from catalyst component (2) being from 1:0.1 to 1:500, wherein the titanium-containing catalyst component (1) employed is the solid-phase product (IV) obtained by bringing into contact (1.1) a finely divided, porous, inorganic oxidic material (I) which has the formula SiO.sub.2 . aAl.sub.2 O.sub.3 --, where a is a number from 0 to 2, and (1.2) a solution (II) formed on bringing together (IIa) 100 parts by weight of an alcohol of the general formula Z--OH, where Z is a saturated hydrocarbon radical of 1 to 8 carbon atoms, (IIb) from 0.01 to 6 parts by weight (calculated as titanium) of a titanium trihalide and (IIc) from 0.01 to 4 parts by weight (calculated as magnesium) of a magnesium compound which is soluble in the alcohol (IIa), so as to form a dispersion (III), with the proviso that the weight ratio of inorganic oxidic material (I) to titanium in the titanium trihalide (IIb) is from 1:0.01 to 1:0.2 and the weight ratio of inorganic oxidic material (I) to magnesium in the magnesium compound (IIc) is from 1:0.01 to 1:0.25, and evaporating the dispersion (III) until it has a dry consistency, thus forming the solid-phase product (IV). The new process is particularly advantageous for the manufacture of homopolymers and copolymers having, for example, particularly advantageous morphological properties.

Particulate polymers of ethylene are prepared by polymerization of ethylene or ethylene/.alpha. -monoalkene mixtures in a dry agitated bed (B) of the particulate polymer by means of a Ziegler/Natta catalyst system consisting of (1) a titanium-containing component and (2) an aluminum-containing component, the said components (1) and (2) being separately fed to the bed (B). Component (1) is a particulate reaction product (U) (of) (1.1) a substance of the formula TiCl.sub.3 . (AlCl.sub.3).sub.n where n is a number equal to from 0 to 0.34, and (1.2) a reaction product (R) of phosgene and a substnace (S) obtained from a substance of the formula Mg.sub.6 . Al.sub.2 . (OH).sub.16 . CO.sub.3 . (H.sub.2 O).sub.4 by calcination (heating), provided that (R) has a chlorine content of from 10 to 76% by weight and (U) has been obtained by milling (1.1) and (1.2) together.

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Bad Durkheim, Germany

Erich Kolk