Basf Aktiengesellschaft

Ernst Leitz Wetzlar Gmbh

Karl Sommer

Heinz Engelbach

Robert Heinz

Peter Palm

Wolfgang Trieselt

Johannes Perner

Albert Hettche

Richard Krabetz

Michael Jolyon Sprague

Walter Herrmann

Heinrich Spahn

Werner Schuster

Harry Hoffmann

Ulrich Bohnaus

Walter Peschke

Rolf Fath

Process for dry dispersal of particles, and a device for carrying out

A granular bleaching activator for use in a detergent or bleach, which has particles which have a size of from 0.5 to 3 mm and are composed of

Granular bleaching activator

A roller press comprising a drivable pair of rollers with a defined nip between these, one or more stuffing screws, associated with the nip, for feeding the material to be granulated to the nip, and a plate, movable in the direction of the screw axis, on which plate the screw and drive are fixed and a pin which can be brought up against a stationary load cell is held.

Roller press for the production of granules or moldings

A coated catalyst comprising (a) an inert carrier having a particle diameter of not less than 100 .mu.m and a surface area of up to 20 m.sup.2 /g and (b) a coating which firmly adheres to the outer surface and in the edge zone, near the surface, of the carrier particles, and which contains the catalytic material, can be prepared by applying the catalytic material in the form of a powder of particle size not more than 300 .mu.m, in the presence of water, to the vigorously agitated carrier by a process wherein catalytically active material in an amount of from 1 to 40 g/minute/liter of carrier, and water in a weight ratio of catalytic material to water of from 1:1 to 30:1, are applied continuously and spatially separate from one another, each at a constant speed, onto the carrier particles, which may or may not have been pre-moistened with water in an amount of up to 95% of the particle absorbency, in such a way that the water content of the coating which forms is less than the maximum degree of saturation of the coating of catalytic material.

Preparation of coated catalysts

Novel coated catalysts and a process for their preparation by atomizing a mixture of water and a vanadium-V compound, with or without other metal compounds, and applying this mixture to carrier particles which are themselves in motion, drying the coating and subjecting the catalyst particles, which are themselves in motion, to repeated brief treatment with a flame or plasma, followed by rapid cooling, defined temperatures and rates of coating being employed. The catalysts may be used with advantage for the preparation of anthraquinones by oxidation of indans.

Coated catalysts and their preparation

Growing community of inventors

Palzing, Germany

Karl Sommer