Chemische Werke Huls Aktiengesellschaft

Chemische Werke Huels Aktiengesellschaft

Bernhard Hentschel

Jurgen Ziebarth

Kurt Kosswig

Alfred Coenen

Martin Bartmann

Josef Kalka

Hermann Winter

Franz-Michael Bollenrath

Ferdinand Von Praun

Bernd Terwiesch

Karl-Heinz Schoenberg

Ferdinand V Praun

Peter Rauth

Hans Grosse-Wortmann

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 process for preparing sodium bicarbonate and hydrogen chloride by reacting an aqueous sodium chloride solution with carbon dioxide under pressure in the presence of an amine and of an organic solvent.

Method for preparing sodium bicarbonate and hydrogen chloride

In a process for removing monomeric impurities from an aqueous dispersion of homopolymers or copolymers of vinyl chloride having a surface tension below 60 dyn/cm. by treatment with steam while avoiding foam formation by a rapid lowering of the pressure at high flow velocities, the improvement which comprises:

Continuous process for the removal of monomeric impurities from aqueous

A method of manufacturing hydrogen chloride by splitting off hydrogen chloride from solutions of amine hydrochlorides. The hydrogen chloride is split off by heating the amine hydrochlorides at 100.degree. to 250.degree. C. in an inert, organic, essentially non-polar solvent having a boiling point at least 20.degree. C. above the temperature of heating while an inert gas stream is passed therethrough. The hydrogen chloride is then separated from the exiting mixture of inert gas and hydrogen chloride. The amine components of the amine hydrochlorides are tertiary alkylamines, tertiary aryldialkylamines, secondary arylalkylamines, primary alkylarylamines or mixtures thereof which contain 14 to 36 carbon atoms in the side chains bonded to nitrogen. Not more than one of the side chains of the amine component is a methyl group bonded to nitrogen and at least one of the side chains is an aliphatic radical, bonded to nitrogen, containing at least 6 carbon atoms. The inert solvents boil above 120.degree. C. and include straight-chain or branched aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbons and mixtures of these compounds, or appropriate petroleum fractions, and furthermore open-chain dialkyl ethers, as well as cyclic ethers, cyclic ketones and ketones which are branched in the .alpha.-position, saturated or unsaturated perchlorinated aliphatic hydrocarbons and also chloro-, dichloro- and nitro-benzene.

Method of manufacturing hydrogen chloride from solutions of amine

Residual vinyl chloride contents of aqueous polyvinyl chloride dispersions is reduced to less than 50 ppm by withdrawing steam and vinyl chloride contained in a boiling aqueous polyvinyl chloride dispersion at a temperature of 80.degree.-100.degree. C. and at a vaporization rate per minute of 0.006-0.2 kg. steam per kg. of polyvinyl chloride for a period of time from 3-60 minutes until a vinyl chloride content of less than 50 p.p.m. is achieved.

Process for the removal of vinyl chloride from polyvinyl chloride

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Marl, Germany

Bernhard Hentschel