公开(公告)号：JPH09169724A

公开(公告)日：1997-06-30

申请号：JP25636096

申请日：1996-09-27

Applicant: BASF AG

Inventor： MARUTEIN SHIYUMITSUTOORADE ,  HERUBERUTO HERUFUERUTO ,  BERUNTO ETSUKU ,  BERUNHARUTO MARUTORII

IPC: C07B63/00 ,  C07D207/26 ,  C07D207/267

公开(公告)号：JPH09227446A

公开(公告)日：1997-09-02

申请号：JP3734497

申请日：1997-02-21

Applicant: BASF AG

Inventor： OTSUTOO MATSUHAHAMAA ,  ARUBUREHITO DAMUSU ,  BERUNTO ETSUKU ,  TEO PURORU

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/05 ,  C07C57/07

公开(公告)号：JPH09103604A

公开(公告)日：1997-04-22

申请号：JP25941896

申请日：1996-09-30

Applicant: BASF AG

Inventor： BERUNTO ETSUKU ,  BERUNHARUTO MARUTORI

IPC: B01D9/02 ,  B01D9/00 ,  C07B63/00 ,  C07C7/14 ,  C07C51/43 ,  C07C57/07

Abstract: PROBLEM TO BE SOLVED: To dispense with supercooling for starting crystallization by coating the surface of a crystallizer with a seed crystal layer consisting of a soln. of a mixture to be separated and crystals suspended in the soln. before crystallization. SOLUTION: A two-phase seed crystal layer in a form of a suspension of a melt or soln. of a mixture to be separated and crystals of the mixture suspended therein is applied to the surface of a crystallizer wherein crystals are grown during crystallization before crystallization. By cooling the melt or the soln. to be separated in the crystallizer to form crystalls, a suspension is obtained. Subsequently, the crystallizer is emptied to apply the suspension to the surface of the crystallizer and the suspension layer is succeedingly frozen to apply a seed crystal layer. The mixture to be purified is introduced into the crystallizer as the melt or the soln. and, succeedingly, a solid crystal phase is frozen on the cooled surface of the crystallizer. Since the crystal phase is already present as the seed crystal layer at the start time of a crystallization stage, it is unnecessary to perform supercooling.