EP 2200961 A1 20100630 - CONTINUOUS PROCESS FOR PREPARING MENTHOL IN PURE OR ENRICHED FORM
Title (en)
CONTINUOUS PROCESS FOR PREPARING MENTHOL IN PURE OR ENRICHED FORM
Title (de)
KONTINUIERLICHES VERFAHREN ZUR HERSTELLUNG VON MENTHOL IN REINER ODER ANGEREICHERTER FORM
Title (fr)
PROCÉDÉ DE PRODUCTION EN CONTINU DE MENTHOL SOUS UNE FORME PURE OU ENRICHIE
Publication
Application
Priority
- EP 2008059657 W 20080723
- EP 07116155 A 20070911
- EP 08786349 A 20080723
Abstract (en)
[origin: EP2036875A1] Continuous process for the preparation of racemic or optically active menthol in a pure and enriched form, comprises distillative separation of racemic or optically active menthol from a material mixture containing racemic or optically active menthol and its diastereomer, where the distillative separation process takes place in a partition column with 50-300 theoretical separation steps and one or more side exhaust position, in an absolute working pressure of 5-500 mbar.
IPC 8 full level
C07C 29/80 (2006.01); B01D 3/14 (2006.01); B01J 19/00 (2006.01); C07C 35/12 (2006.01)
CPC (source: EP US)
B01D 3/14 (2013.01 - EP US); B01D 3/141 (2013.01 - EP US); C07C 29/80 (2013.01 - EP US); C07B 2200/07 (2013.01 - EP US); C07C 2601/14 (2017.04 - EP US)
Citation (search report)
See references of WO 2009033870A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
EP 2036875 A1 20090318; CN 101801900 A 20100811; CN 101801900 B 20131113; EP 2200961 A1 20100630; JP 2010539072 A 20101216; JP 2014028811 A 20140213; JP 5468003 B2 20140409; MX 2010002525 A 20100325; US 2010206712 A1 20100819; US 2014158515 A1 20140612; US 8414744 B2 20130409; WO 2009033870 A1 20090319
DOCDB simple family (application)
EP 07116155 A 20070911; CN 200880106578 A 20080723; EP 08786349 A 20080723; EP 2008059657 W 20080723; JP 2010523454 A 20080723; JP 2013169046 A 20130816; MX 2010002525 A 20080723; US 201313790465 A 20130308; US 67768808 A 20080723