Patents Assigned to Degussa-Hus Aktiengesellschaft
  • Patent number: 6159252
    Abstract: This invention relates to a process for the production of granulates by fluidized bed spray granulation and to a device for this purpose. Liquid starting materials may be converted into granulates by fluidized bed spray granulation. In order to ensure elevated material throughput, numerous nozzles, which are moreover susceptible to plugging and encrustation, must be installed.The disadvantages of known processes may be overcome according to the invention by arranging at least two spray nozzles at least partially directed towards each other in such a manner and the quantity of spray is adjusted in such a manner that their spray jets collide within the fluidized bed and substantially no liquid strike-through occurs onto a surface delimiting the fluidized bed or out of the fluidized bed. The spray jets of two spray nozzles directed towards each other collide frontally or enclose an angle of less than 180.degree.; the angle is preferably between 150.degree. and 180.degree..
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: December 12, 2000
    Assignee: Degussa-Hus Aktiengesellschaft
    Inventors: Rudiger Schutte, Claas-Jurgen Klasen, Martin Bewersdorf, Hans-Christian Alt