Basf Aktiengesellschaft

Werner Hesse

Hans-Josef Sterzel

Stephan Bauer

Peter J Uggowitzer

Bernd Bronstert

Gregor Brodt

Hans Wohlfromm

Christian Tragut

Markus Speidel

Helmut M&ouml;hwald

Knut Bittler

Hans-Ulrich J&auml;ger

Bernd Laubusch

Hans-Ulrich Jäger

Jens Haas

Birgit Tommuscheit

The invention relates to a process for obtaining gold-colored aluminum oxide layers in which the coloring of the oxidized surface of the aluminum or aluminum alloys is carried out by an electrolytic process in an electrolyte comprising an alkanesulfonic acid and an alkanesulfonate of silver, and to the use of the gold-colored workpieces based on aluminum or aluminum alloys produced by this process for decorative purposes. The invention furthermore relates to an electrolyte solution for coloring the oxidized surface of aluminum or aluminum alloys gold by an electrolytic process, and to the use of an electrolyte comprising an alkanesulfonate of silver for coloring aluminum oxide layers based on aluminum or aluminum alloys gold in an electrolytic process.

Method for producing gold-colored surfaces pertaining to aluminum or aluminum alloys, by means of formulations containing silver salt

A process is described for the catalytic removal of HS gas from a sour gas stream in the presence of a chelate ligand of the formula (I) A mixture is also described for removing HS gas from a sour gas stream, the mixture comprising an aminocarboxylate-containing metal chelate complex, and the use is also described of an aminocarboxylate-containing metal chelate complex for removing HS gas from a sour gas stream.

Method for desulphurizing acid gases using catalysts that are insensitive to oxidation and contain aminocarboxylate

Method for electrolytic galvanizing using electrolytes containing alkane sulphonic acid

The invention relates to a process for the preparation of organic disulfides by oxidation of mercaptans with sulfur dissolved in an organic disulfide using an amine as catalyst, where the mercaptans are used as &ldquo;crude mercaptan stream&rdquo; from a reaction of alcohols with hydrogen sulfide over a catalyst suitable for mercaptan synthesis. Furthermore, the invention relates to the use of the organic disulfides for the preparation of alkanesulfonic acids.

Process for the preparation of organic disulfides

Hard sintered moldings having a nickel- and cobalt-free, nitrogen-containing steel as a binder of the hard phase, processes for the powder metallurgical production of these hard sintered moldings, in particular by powder injection molding, and powder injection molding materials for the production of these hard sintered moldings by powder injection molding.

Hard material sintered compact with a nickel- and cobalt-free, nitrogenous steel as binder of the hard phase

Mixtures with special softening agents suited as a solid electrolyte or separator for electrochemical cells

In a process for producing polychrome ceramic shaped parts, at least two granulates formed from ceramic powder, binder and color-producing particles are shaped, subjected to binder removal and sintered. The granulates are formed from different color-producing particles and/or different concentrations of the same color-producing particles.

Process for the production of polychrome ceramic shaped parts

In a process for producing granular material in which at least one hard material phase is mixed with a metal powder and a binder and granulated, no premixing of the hard material phase and the metal powder takes place before mixing with the binder and the binder has a viscosity of from 20 to 200 cm.sup.3 /10 min, preferably from 30 to 100 cm.sup.3 /10 min, in accordance with DIN 53735 at 195.degree. C. and a load of 2.16 kg.

Process for producing granular material and shaped parts from hard metal

In the preparation of pulverulent zirconium dioxide by dissolving a zirconium compound in formic acid, removing the volatile components and calcining the residue, a chloride-free zirconium compound is dissolved in a formic acid/water mixture and the zirconium dioxide is obtained in a manner known per se.

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Obrigheim, Germany

Werner Hesse