Chemische Werke Huls Aktiengesellschaft

Alfred Coenen

Kurt Kosswig

Ferdinand Von Praun

Bernhard Hentschel

Jurgen Ziebarth

Ferdinand V Praun

Ekkehard Wienhofer

Dieter Balzer

Manfred Schroeder

Hans Regner

Gunter Prominski

Hans-Peter Schuller

Guenter Prominski

Copper(II) chloride is prepared from copper(II) oxychloride in a nonpolar solvent, preferably during oxychlorination. As the source of hydrogen chloride, the hydrochlorides of certain tertiary amines having 12-40 carbon atoms in total are utilized. The amine contains at most one N-methyl group and its dissociation constant K.sub.a of the equilibrium reaction

Process for the production of copper (II) chloride from copper (II)

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

A process for producing sodium bicarbonate and hydrogen chloride by reacting an aqueous sodium chloride solution with carbon dioxide in the presence of an amine and an organic solvent. The steps of the process are carried out, wherein:

Process for preparing sodium bicarbonate and hydrogen chloride

According to the present invention, ammonia and hydrogen chloride are prepared from ammonium chloride. The steps of the process include:

Method for preparing ammonia and hydrogen chloride from ammonium chloride

An improvement in the process for obtaining gaseous hydrogen chloride by extracting dilute aqueous hydrochloric acid with amines wherein:

Method for obtaining gaseous hydrogen chloride from dilute aqueous

A method of purifying tertiary amines by removing sec. and prim. amines and/or their hydrochlorides produced in the manufacture of the tertiary amines. The impurities are removed by dissolving the impure tertiary amines in an organic solvent and the resulting solution is passed over absorbents such as aluminum oxides having a specific surface area of about 100 to 400 square meters per gram. The sec. and prim. amines and/or their hydrochlorides are retained on the adsorbents and pure tertiary amines are useful in the solvents or can be separated therefrom. The adsorbents are regenerated by passing polar solvents thereover to remove the sec. and prim. amines and/or their hydrochlorides.

Purification of tertiary amines using an adsorbent

A method of separating HBr from a mixture of HBr/HCl using the difference in the stability to heat of the amine hydrohalides thereof. A mixture of HBr/HCl is treated with a solution of an amine and the HCl is split off, by the action of heat, from the amine hydrochlorides in the resulting mixture of amine hydrochlorides and amine hydrobromides, and the HBr is then recovered from the residual amine hydrobromides with the aid of a base and optionally recovered.

Method for separating hydrogen chloride and hydrogen bromide

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

Process for the production of gaseous hydrogen chloride by extraction of dilute aqueous hydrochloric acid with amines.

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Marl, Germany

Alfred Coenen