Chemische Werke Huls Aktiengesellschaft

Degussa Aktiengesellschaft

Huls Aktiengesellschaft

Huels Aktiengesellschaft

Degussa-huels Aktiengesellschaft

Franz-Michael Bollenrath

Hartwig Rauleder

Martin Bartmann

Josef K Rigler

Stefan Bade

Uwe Schoen

Mieczyslaw Kuzma

Harald Seiler

Christoph Koopmann

Karl Trukenbrod

Hermann-Josef Korte

Uwe Tanger

Bernhard Hentschel

John Burkhard

Norbert Hofmann

Bernard Hentschel

Chlorosilanes are continuously removed from a gas stream in an apparatus in which the gas stream is treated in a first stage with water vapor in the gas phase, and in a second stage with a liquid, aqueous phase.

Process for the separation of chlorosilanes from gas streams

Process for the continuous preparation of 3-halopropylorganosilanes

The invention relates to a process for preparing vinylchlorosilanes by thermal non-catalyzed reaction of chlorosilanes with vinyl chloride at from 550 to 700&deg; C., using a ring-gap reactor which includes rapidly cooling the hot reaction gases after they have flowed through the ring-gap space, by quenching them with a liquid.

Process for preparing vinylchlorosilanes

An agitator vessel is equipped with a radially conveying agitator and with at least one baffle, for the thorough mixing of liquids, the at least one baffle has the shape of an airfoil profile and is arranged below the level of liquids and above the blades of the agitator. The agitator vessel is equipped with a radially conveying agitator 3 and at least one baffle 2, the latter having the shape of an airfoil profile.

Agitator vessel with radially conveying agitator and with at least one

A method for introducing gases into liquids, wherein a stirred kettle is used which has the form of a cylindrical vessel in which the length/diameter ratio should be at least 1; and wherein the stirred kettle is filled to a level of more than 70% with the liquid into which gas is to be introduced, the gas feed rate is adapted to the absorption capacity of the liquid, and the stirrer speed is adjusted such that the largest coherent amount of gas is 10% of the volume of the stirred kettle.

Process for introducing gases into liquids in the production of

A method of continuous rapid determination of the J-value during the oxidative coupling reaction of phenols to form polyphenylene ethers. Solution of a defined temperature is withdrawn from the reaction mixture, the viscosity of the solution is measured in a Couette viscometer, and the J-value is determined using a calibration curve or mathematical means.

Method of determining viscosity number during the oxidative coupling

The invention relates to a process for introducing gases into liquids, a stirred kettle being used which has the form of a cylindrical vessel in which the length/diameter ratio should be at least 1. The stirred kettle is filled to a level of more than 70% with the liquid into which gas is to be introduced, the gas feed rate is adapted to the absorption capacity of the liquid, and the stirrer speed is adjusted such that the largest coherent gas space amounts, as a maximum, to 10% of the volume of the stirred kettle.

Process for introducing gases into liquids

Process for the production of fine particulate, expandable styrene polymers by suspension-polymerizing styrene or possibly mixtures of styrene and other monomers having at least 50% by weight of styrene in the presence of expanding agents having low boiling points in incompletely filled reactors. The polymer beads to be charged with expanding agents are vigorously stirred during the addition of the expanding agent(s) in such a manner that these beads undergo the least possible contact in time and space with the gas phase and with each other, and so that the surface of the stirred medium retains a topology as free as possible from a funnel shape during stirring.

Production of fine particulate, expandable styrene polymers with

Growing community of inventors

Marl, Germany

Franz-Michael Bollenrath