Degussa Aktiengesellschaft

Degussa - Huls Ag

Ivan Pelgrims

Alexander Ruhs

R&uuml;diger Sch&uuml;tte

Rudiger Schutte

Martin Bewersdorf

Lothar Kaiser

Claas-Juergen Klasen

The production of foam which occurs in many chemical and physical materials conversion processes can be avoided by performing the materials conversion process in an ascending jet reactor, including a baffle-free container with a tapering lower section, preferably a conical lower section, and a device for gas injection, and the contents of the reactor are thoroughly mixed by means of ascending jet circulation caused by gas injection.

Process for reducing or avoiding foam production during chemical and physical materials conversion processes

Process for reducing or avoiding foam production during chemical and physical materials conversion processes and a device for performing this process

Sodium percarbonate particles stabilized against loss of active oxygen in detergents, bleaches and cleaning agents by the application of a two-layer coating applied by means of a fluidized bed spray process, the inner layer including sodium percarbonate and the outer layer including sodium sulphate.

Coated sodium percarbonate particles, process for the production thereof

Sodium perborate monohydrate having an O.sub.a content of 14 to 16%, a bulk density of at least 600 g/l, an abrasion index (ISO 5937) of less than 8%, and a specific surface of less than 5 m.sup.2 /g can be produced by a fluidized bed--spraying process by spraying a sodium perborate solution produced by combining and mixing an aqueous hydrogen peroxide solution with an aqueous sodium metaborate solution, whereby the contact time between the combination of the solutions and the spraying is at least 2 seconds and preferably at least 5 seconds.

Process for producing abrasion-resistant sodium perborate monohydrate

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Kontich, Belgium

Ivan Pelgrims