Ciba-geigy Corporation

Alain Millioud

Beat Bruttel

Hansjorg Schneider

Michael Rosch

A spray drier (1) for the preparation of powders, agglomerates or the like, by the drying of pumpable products, has at an inlet (6) of its exhaust discharge line or lines (7) for the drying gas used in its drying chamber (3), a wind sifter (9) with a rotating bucket wheel (10). The flow generated by the rotating bucket wheel (10) of the wind sifter (9) acts against the exhaust suction flow. The discharge of fine materials is directed into the exhaust line (7) and the coarse material discharge (8) takes place in the drying chamber (3). Consequently, excellent desired separation of the coarse material component from the fine material component can be obtained within the drying chamber.

Spray drier for the preparation of powders, agglomerates and the like

A process for producing agglomerates of water-soluble dyes by adding a granulating auxiliary to at least one water-soluble dye, which is in pulverulent form, and converting the mixture, while it is being subjected to a tumbling and/or mixing action, by particle enlargement into a granular form, in which process there is used as a granulating auxiliary:

Growing community of inventors

Allschwil, Switzerland

Alain Millioud