Schering Aktiengesellschaft

Witco Corporation

Crompton Gmbh

Lanxess Organometallics Gmbh

Chemtura Organometalics Gmbh

Chemtura Organometallics Gmbh

Oliver Schumacher

Ulrich Stewen

Liane Franke

Jens Röder

Michael Richter

Andrea Kapries

RoseMarie E Stewart

Johannes Canisius

Damian Kielbus

Ursula Gerigk

Thomas Pieper

Detlef Massing

Harold Mark

Detlef Maßing

The present invention provides a process for producing monooctyltin trichloride comprising very low levels of dioctyltin and trioctyltin compounds, said process comprising the following steps: (1) Contacting an organotin chloride mixture comprising monooctyltin chloride with an aqueous phase containing halide ions, said step optionally being carried out in the presence of organic solvent; (2) separating the resulting aqueous phase which is rich in monooctyltin chloride from the organic phase containing most of the dioctyltin and trioctyltin compounds; (3) optionally purifying said aqueous phase comprising monooctyltin trichloride from undesired side products by washing said aqueous phase with an organic solvent; and (4) recovering monooctyltin trichloride from said aqueous phase comprising monooctyltin trichloride.

Process for purifying monooctylin trichloride

The present invention relates to catalytic compositions for esterification, transestrification and polycondensation reactions, a process for the catalysis of said reactions employing such catalytic compositions and polyesters for resins obtainable by this process.

Catalytic composition of organotin compounds

The invention relates to a process for the direct preparation of mixtures of monoalkyltin trichlorides RSnCland dialkyltin dichlorides RSnClin one reaction step by partial alkylation of tin tetrachloride using alkylaluminum compounds in the form of their ether donor complexes, wherein an amount of ether greater than that required for stoichiometric formation of the donor complex is used in the reaction.

Process for preparing monoalkyltin halides and dialkyltin halides and their use

The invention relates to a process for preparing water-soluble organotin catalysts by contacting organotin compounds with polyelectrolytes and, optionally, subsequently removing the water.

Process for preparing water-soluble catalysts

Disclosed are aqueous dispersions of dibutyltin oxide which contain water, dibutyltin oxide in substantial amounts on the order of 50 to 75 wt. %, as well as a fatty acid ethoxylate surfactant, a suspending agent, and a viscosity modifier component of one or more C.sub.12 -C.sub.24 fatty acids and/or alkali metal salts thereof.

Stable aqueous dispersions of dibutyltin oxide

Stabilization of alkyltin compounds that are liquid at room temperature, especially alkyltin trihalides, is achieved by addition of 0.1 to 10 wt. % of one or more compounds that are soluble in the alkyltin compounds and that are reactive with water.

Process for the stabilization of organotin halides by lactams and/or

Process for the solvent extraction of palladium from aqueous solutions

Process for preparing chelating ion exchanger resins and the use thereof

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Werne, Germany

Oliver Schumacher