Basf Aktiengesellschaft

Basf Se Corporation

Josef Guth

Holger Friedrich

Kerstin Schierle-Arndt

Dieter Schl&auml;fer

Hermann P&uuml;tter

G&uuml;nther Huber

Hans-Josef Sterzel

Michael Lutz

Kirsten Burkart

Thomas Letzelter

Hans-Jürgen Bender

J&uuml;rgen Schweinzer

Gerd Kaibel

Peter Zehner

Kaspar Bott

Horst Hartmann

Günther Huber

Hans-Ulrich Schlimper

Guenther Huber

Dieter Schlafer

Marc Claude Martin

Bernd Schube

Wolf-Steffen Weissker

Axel Franke

Uwe Behling

Dieter Schläfer

Michael Wille

Elisabeth Gunkel

Elke Hoffmann

Hans-J&uuml;rgen Bender

Diethard Lenz

Wolfgang Kanther

Kai Hofen

The invention relates to a process for removing small amounts of water and possible further constituents from alkali metal amalgam, wherein the alkali metal amalgam is brought into contact with an element which is insoluble in mercury and catalyzes the reaction of water with the alkali metal amalgam and the possible further constituents to form hydroxides and hydrogen.

Process for removing water from alkali metal amalgam

An electrolysis device producing alkali metals from a liquid alkali metal heavy metal alloy, including at least two connected tubes forming an electrolysis unit. Two solid electrolyte tubes are arranged concentrically in each tube and oriented with openings towards one end of each tube such that a first annular gap for guiding a liquid alkali metal forming an anode is located between the inside of the tube and the outside of the solid electrolyte tubes. An alloy inlet and outlet for the liquid alkali metal in each of the tubes leads into the first annular gap of a tube. An inner chamber sealed off from the alloy inlet, first annular gap, and alloy outlet in each solid electrolyte tube receives liquid alkali metal that can be used as a cathode connected to the alkali metal outlet. Two respective closure devices are arranged at the two ends of each tube.

Electrolysis device for the production of alkali metal

Mercury is removed from solutions contaminated with mercury, the solution contaminated with mercury being introduced into a distillation column above the column bottom, solvent being distilled off and solution depleted in mercury being stripped off at the column bottom.

Process for the removal of mercury from solutions contaminated with mercury

Mercury is removed from solutions contaminated with mercury by filtration through a carbon filter consisting of electrode graphite.

The present invention relates to a process for preparing largely HBr-free HCl gas and largely HBr-free aqueous HCl solution, which comprises the following steps: The process of the present invention allows high-purity aqueous HCl solution for use in the semiconductor industry to be prepared inexpensively and on an industrial scale. However, the purified HCl gas obtained by means of steps a) to c) can also be used for any other purposes. The invention likewise provides an apparatus for carrying out the process of the present invention.

Preparation of largely HBr-free HCI gas and largely HBr-free aqueous HCI solution

The invention relates to an electrolysis cell comprising an anode compartment which comprises an aqueous solution of at least one alkali metal salt, a cathode compartment and a solid electrolyte which separates the anode compartment and the cathode compartment from one another, wherein that part of the surface of the solid electrolyte which is in contact with the anode compartment and/or that part of the surface of the solid electrolyte which is in contact with the cathode compartment has/have at least one further ion-conducting layer.

Method for electrochemically producing an alkali metal from an aqueous solution

Method for producing alkali methylates

Alkali metal alkoxides are prepared by reacting alkali metal amalgam with alcohol in the presence of a catalyst comprising iron having a carbon content of at least 0.3% by weight.

Catalytic preparation of alkali metal alkoxides

The invention relates to a process for preparing alkali metal alkoxides by reacting alkali metals with alcohols in the presence of a catalyst, preferably a transition metal salt and especially iron(III) chloride.

Method for producing alkali metal alcoholates

In a process for producing an alkali metal from alkali metal amalgam by electrolysis using an alkali metal amalgam as anode, a solid electrolyte which conducts alkali metal ions and a liquid alkali metal as cathode, the alkali metal amalgam as anode is kept in motion.

Electrochemical production of alkali metal from an alkali metal amalgam

An electrolytic cell comprises an agitated, alkali metal amalgam-containing anode, an alkali metal ion-conducting solid electrolyte and a cathode, wherein the solid electrolyte and the cathode are separated from one another by a liquid electrolyte.

Electrolytic cell for producing an alkali metal

Electrochemical production of lithium using a lithium amalgam anode

Orthoesters are prepared by reacting 1,1,1-trihaloalkanes with alkali metal alkoxides in the presence of the corresponding alcohol, a slurry of the alkali metal alkoxide in the corresponding alcohol being used.

Preparation of orthoesters

Carboxylic esters are prepared by reacting carboxylic acids with low-boiling alcohols by charging the reaction mixture to a 1st distillation column, withdrawing the reaction components carboxylic ester, water and unconverted alcohol as overhead product and charging this overhead product to a 2nd distillation column, from which

Preparation of carboxylic esters

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Freinsheim, Germany

Josef Guth