Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A process for the continuous preparation of 3-halopropylorganosilanes of the general structure RbH3-a-bXaSiCH2CH2CH2Y  (III), where: R is CH3, C2H5, C3H7, OCH3, OC2H5 or OC3H7, X is F, Cl, Br or I, Y is F, Cl, Br or I, and a and b are each one of the numbers 0, 1, 2 or 3 and the sum a+b is 1, 2 or 3, comprising reacting, as starting materials, an allyl halide with a silane carrying at least one H atom, wherein the starting materials are present in stoichiometric amounts or one of the starting materials is present in substoichiometric amounts, wherein the reaction carried out is a partial reaction of from 10% to 80%, on a molar basis, of the starting materials, based on either material, when both are present in stoichiometric amounts, or based on the substoichiometric material.

Abstract: The invention relates to a process for preparing vinylchlorosilanes by thermal non-catalyzed reaction of chlorosilanes with vinyl chloride at from 550 to 700° 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.