Degussa Aktiengesellschaft

Dieter M&ouml;ller

Stefan Nordhoff

Rudolf M Wagner

Matthias Creutz

J&uuml;rgen Glenneberg

A process for the concentration of aqueous hydrogen peroxide by discontinuous crystallization. A cooling surface is arranged in a crystallizing vessel and first wetted with hydrogen peroxide and then cooled at a high cooling rate, whereupon seed crystals form. The cooling rate is at least 1 K/s, preferably from 10 to 30 K/s. When the vessel has been filled with H O starting material, the latter crystallizes, starting from the seed crystals, and forms a crystal layer. When the mother liquor of lower H O concentration has been discharged, there follows a sweating operation with a slow increase in temperature, as a result of which the H O concentration in the crystal layer is increased further.

Growing community of inventors

Babenhausen, Germany

Dieter Möller

Growing community of inventors

Babenhausen, Germany

Dieter M&ouml;ller

Dieter Möller