Basell Poliolefine Italia S.r.l.

Montell Technology Company Bv

Paolo Vincenzi

Rosa Spoto

Giampiero Morini

Gianni Collina

Tiziano Dall'Occo

Gianni Vitale

Fabrizio Piemontesi

Diego Brita

Ofelia Fusco

Anna Fait

Benedetta Gaddi

Daniele Evangelisti

Maria Di Diego

Arrigo Arletti

Silvia Soffritti

Lorella Pedriali

Piero Gessi

Matteo Badalocchi

Prepolymerized catalyst component for the polymerization of olefins CH&#x2550;CHR, wherein R is hydrogen or a C-Chydrocarbyl group, comprising a solid catalyst component characterized by comprising Mg, Ti halogen and an electron donor (ID) selected from the alkyl esters of aromatic dicarboxylic acids in such an amount that the molar ratio ID/Mg ranges from 0.025 to 0.07 and the Mg/Ti molar ratio is higher than 13, said prepolymerized catalyst component containing an amount of ethylene pre-polymer up to 50 g per g of said solid catalyst component.

Catalyst components for the polymerization of olefins

A method for continuously recovering titanium tetrachloride TiClfrom a waste liquid comprising TiCland by-products, wherein said waste liquid is subjected, as a flowing liquid film, to an evaporation step for a residence time of less than 15 minutes at a temperature higher than 90&#xb0; C.

Method for recovering titanium tetrachloride from a waste liquid

A multistage process for the continuous production of an emulsion comprising subjecting at least two immiscible liquids to a sequence of at least two mixing stages carried out in at least two successive stator-rotor devices, wherein a peripheral outlet from a first stator-rotor device is connected to an axial inlet in the successive stator-rotor device by means of a duct in which the Reynold number Reinside said duct is higher than 5000, and the peripheral velocity of each rotor of said stator-rotor devices ranges from 5 to 60 m/s.

Process for the continuous production of emulsions

Process for the preparation of a solid catalyst component for the polymerization of olefins, the process comprising the steps of: &#x2014;continuously contacting solid particles of a MgCl.mROH adduct, wherein 0.5&#x3c;m&#x3c;6.0 and R is an alkyl, cicloalkyl or aryl radical having 1-12 carbon atoms, with a liquid phase comprising one or more compounds capable of reacting with the &#x2014;OH groups of said adduct to obtain a slurry containing a MgCl.nROH, wherein n is lower than m; &#x2014;reacting the slurry from step a) with one or more titanium compounds of formula Ti(OR)X, wherein q=3-4 and p=0-q, X is an halogen and R is an alkyl, cicloalkyl or aryl radical having 1-18 carbon atoms.

Process for preparing catalyst components for the olefin polymerization

A process for preparing a catalyst component, comprising a Mg compound a Ti compound and an electron donor compound (ED) selected from alcohol, glycols, esters, ketones, amines, amides, nitrites, alkoxysilanes and aliphatic ethers as essential compounds, comprising two or more steps of reaction involving the use of at least one of said essential compounds as fresh reactant alone or in a mixture in which it constitutes the main component, said process being characterized by the fact that in the last of said one or more reaction steps the essential compound used as a fresh reactant is the ED compound.

Process for the preparation of a catalyst component and components therefrom obtained

A process, particularly a gas phase fluidised bed process, for the production of polymers avoids formation of sheets or chunks within the reactor, without the need to use antistatic agents, which can reduce the activity of the catalyst or alter the characteristics of the yielded product. According to the invention, a device generates a corona discharge in the polymerisation reactor during the polymerisation process; an AC voltage difference is applied between the elements which constitute the discharging pair of the device.

Process for the production of polymer

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Ficarolo, Italy

Paolo Vincenzi