公开(公告)号：EP2391431B1

公开(公告)日：2013-12-04

申请号：EP10701145.4

申请日：2010-01-25

Applicant: BASF SE

Inventor： LINSENBÜHLER, Markus ,  SACHWEH,Bernd ,  HALPAP, Jörg ,  KARCHES, Martin ,  RIEGER, Reinhold

IPC: C09B67/54 ,  B01D7/00

CPC classification number: B01D7/00 ,  C09B67/0096

公开(公告)号：EP2391431A1

公开(公告)日：2011-12-07

申请号：EP10701145.4

申请日：2010-01-25

Applicant: BASF SE

Inventor： LINSENBÜHLER, Markus ,  SACHWEH,Bernd ,  HALPAP, Jörg ,  KARCHES, Martin ,  RIEGER, Reinhold

IPC: B01D7/00 ,  C09B67/00 ,  C23C14/00

CPC classification number: B01D7/00 ,  C09B67/0096

Abstract: The invention relates to a method for continuously cleaning a solid mixture, comprising a valuable product that can be sublimated, and components that can be sublimated more easily and with more difficulty, by fractionated sublimation/desublimation in a hot wall tube furnace (1), by supplying the solid mixture together with an inert gas flow, in which the solid mixture is dispersed by way of a dispersing organ (2), at an end of the hot wall tube furnace (1); - heating the dispersed solid mixture in the hot wall tube furnace (1) at a temperature at which the valuable product sublimates, to obtain a gas mixture comprising components that are more difficult to sublimate than the valuable product as solid particles; - passing the gas mixture, comprising components that are more difficult to sublimate than the valuable product as solid particles, over a hot gas filter (3) having a suitable pore size in order to retain the solid particles that sublimate with more difficulty than the valuable product; - cooling the gas mixture, from which the components that are more difficult to sublimate than the valuable product are separated, to a temperature at which the valuable product desublimates and at which the components sublimating more easily than the valuable product do not yet desublimate to obtain a gas mixture comprising the particle-shaped valuable product; and - separating the cleaned, particle-shaped valuable product from the cooled gas mixture.