EP 0944418 A1 19990929 - SUSPENSION CRYSTALLIZATION METHOD
Title (en)
SUSPENSION CRYSTALLIZATION METHOD
Title (de)
VERFAHREN ZUR SUSPENSIONSKRISTALLISATION
Title (fr)
PROCEDE DE CRISTALLISATION EN SUSPENSION
Publication
Application
Priority
- DE 19651215 A 19961210
- EP 9706611 W 19971127
Abstract (en)
[origin: DE19651215C1] The invention concerns a method of separating organic compounds by single- or multi-stage suspension crystallization, each stage consisting of a crystallizer, optionally a crystallizer vessel, and a filter (7) for separating the liquid phase from the crystal mass. The liquid phase (8) separated in the filter (7) is returned to the respective crystallization stage and the crystal mass (9, 11) is fed to the subsequent stage or out of the final stage into the washing column (20) for the complete separation of the mother liquor, the liquid depleted of isomer to be crystallized (21) being channelled out of the respective stage and the initial compound mixture (6a, 6b) being passed behind the final crystallization stage. The method is characterized in that at least some of the mother liquor of the crystal mass extracted from the final crystallization stage is gradually replaced by the initial compound mixture.
IPC 1-7
IPC 8 full level
B01D 9/02 (2006.01); B01D 9/00 (2006.01); C07B 63/00 (2006.01); C07C 263/20 (2006.01); C07C 265/14 (2006.01)
CPC (source: EP)
B01D 9/0013 (2013.01); B01D 9/004 (2013.01); B01D 9/0045 (2013.01); B01D 9/0059 (2013.01); C07C 263/20 (2013.01)
Citation (search report)
See references of WO 9825680A1
Designated contracting state (EPC)
BE DE ES FR GB IT NL
DOCDB simple family (publication)
DE 19651215 C1 19980709; AU 5655798 A 19980703; BR 9714138 A 20000229; EP 0944418 A1 19990929; JP 2001506539 A 20010522; TW 386987 B 20000411; WO 9825680 A1 19980618
DOCDB simple family (application)
DE 19651215 A 19961210; AU 5655798 A 19971127; BR 9714138 A 19971127; EP 9706611 W 19971127; EP 97952811 A 19971127; JP 52614798 A 19971127; TW 86117880 A 19971128