公开(公告)号：EP2225192A2

公开(公告)日：2010-09-08

申请号：EP08854428.3

申请日：2008-11-13

Applicant: BASF SE

Inventor： HEYDRICH, Gunnar ,  GRALLA, Gabriele ,  RAULS, Matthias ,  SCHMIDT-LEITHOFF, Joachim ,  EBEL, Klaus ,  KRAUSE, Wolfgang ,  OEHLENSCHLÄGER, Steffen ,  JÄKEL, Christoph ,  FRIEDRICH, Marko ,  BERGNER, Eike Johannes ,  KASHANI-SHIRAZI, Nawid ,  PACIELLO, Rocco

IPC: C07C29/17

CPC classification number: C07C29/56 ,  C07B2200/07 ,  C07C29/172 ,  C07C29/78 ,  C07C45/62 ,  C07C45/82 ,  C07C2601/14 ,  C07C2601/16 ,  C07C47/21 ,  C07C35/12 ,  C07C35/17

Abstract: The invention relates to a particularly economic, complete method for producing menthol, especially for the production of optically active, essentially enantiomerically and diastereomerically pure L-menthol and of racemic menthol starting from the commercially accessible, inexpensive parent material citral. The method comprises the following steps: a.1 ) catalytic hydrogenation of neral and/or geranial to form citronellal, b.1 ) cyclisation of citronellal to form isopulegol in the presence of an acidic catalyst, c.1 ) purification of isopulegol by crystallisation and d.1 ) catalytic hydrogenation of isopulegol to form menthol.

公开(公告)号：EP1838650B1

公开(公告)日：2010-09-08

申请号：EP05843706.2

申请日：2005-12-17

Applicant: BASF SE

Inventor： FRIEDRICH, Marko ,  EBEL, Klaus ,  GÖTZ, Norbert

IPC: C07C29/56 ,  C07C35/17

CPC classification number: C07C29/56 ,  C07B2200/07 ,  C07C2601/14 ,  C07C35/17

公开(公告)号：EP2059493B1

公开(公告)日：2016-11-16

申请号：EP07803135.8

申请日：2007-08-31

Applicant: BASF SE

Inventor： HEYDRICH, Gunnar ,  GRALLA, Gabriele ,  EBEL, Klaus ,  FRIEDRICH, Marko

IPC: C07C29/17 ,  C07C29/56 ,  C07C29/80 ,  C07C35/17 ,  C07C35/12 ,  B01J31/02 ,  B01J31/14 ,  B01J31/40

CPC classification number: C07C29/80 ,  B01J31/0214 ,  B01J31/143 ,  B01J31/4015 ,  C07B2200/07 ,  C07C29/172 ,  C07C29/56 ,  C07C35/12 ,  C07C35/17 ,  C07C2601/14 ,  Y02P20/584

公开(公告)号：EP2225192B1

公开(公告)日：2017-05-03

申请号：EP08854428.3

申请日：2008-11-13

Applicant: BASF SE

Inventor： HEYDRICH, Gunnar ,  GRALLA, Gabriele ,  RAULS, Matthias ,  SCHMIDT-LEITHOFF, Joachim ,  EBEL, Klaus ,  KRAUSE, Wolfgang ,  OEHLENSCHLÄGER, Steffen ,  JÄKEL, Christoph ,  FRIEDRICH, Marko ,  BERGNER, Eike Johannes ,  KASHANI-SHIRAZI, Nawid ,  PACIELLO, Rocco

IPC: C07C29/56 ,  C07C29/78 ,  C07C45/62 ,  C07C45/82 ,  C07C29/17

CPC classification number: C07C29/56 ,  C07B2200/07 ,  C07C29/172 ,  C07C29/78 ,  C07C45/62 ,  C07C45/82 ,  C07C2601/14 ,  C07C2601/16 ,  C07C47/21 ,  C07C35/12 ,  C07C35/17

公开(公告)号：EP2059493A1

公开(公告)日：2009-05-20

申请号：EP07803135.8

申请日：2007-08-31

Applicant: BASF SE

Inventor： HEYDRICH, Gunnar ,  GRALLA, Gabriele ,  EBEL, Klaus ,  FRIEDRICH, Marko

IPC: C07C29/17 ,  C07C29/56 ,  C07C29/80 ,  C07C35/17 ,  C07C35/12

CPC classification number: C07C29/80 ,  B01J31/0214 ,  B01J31/143 ,  B01J31/4015 ,  C07B2200/07 ,  C07C29/172 ,  C07C29/56 ,  C07C35/12 ,  C07C35/17 ,  C07C2601/14 ,  Y02P20/584

Abstract: The invention relates to methods for preparing a reaction product containing aluminium, obtained during the production of isopulegol, by the cyclization of citronellal in the presence of complex compounds, said product containing at least one ligand of formula (I), in which: R1, R2, R3 are selected from hydrogen, halogen, nitro, C1-C8 alkyl, C1-C8 alkoxy, di(C1-C4 alkyl)amino and aryl; and R4, R5 are selected from halogen, nitro, C1-C8 alkyl, C1-C8 alkoxy, di-(C1-C4 alkyl)amino, aryl or heteroaryl. According to said method, a) the reaction product is separated by distillation into a top product enriched with isopulegol and a bottom product poor in isopulegol and b) the ligand of formula (I) is isolated from the bottom product. In addition, the invention relates to a method for producing isopulegol and to a method for producing menthol.

公开(公告)号：EP1858903B1

公开(公告)日：2008-10-08

申请号：EP06708615.7

申请日：2006-03-03

Applicant: BASF SE

Inventor： FRIEDRICH, Marko ,  EBEL, Klaus ,  GÖTZ, Norbert ,  KRAUSE, Wolfgang ,  ZAHM, Christian

IPC: C07F5/06 ,  C07C29/56 ,  C07C35/17

CPC classification number: C07F5/069

Abstract: The invention relates to diarylphenoxy aluminum compounds that can be obtained by reacting a bis(diarylphenol) ligand of formula (I) with an alkylaluminum compound and/or with a complex aluminum hydride. The invention also relates to the use of diarylphenoxy aluminum compounds as catalysts, and relates to a method for producing isopulegol by cyclizing citronellal in the presence of diarylphenoxy aluminum compounds serving as catalysts. The invention further relates to a method for producing menthol by cyclizing citronellal in the presence of diarylphenoxy aluminum compounds serving as catalysts and the subsequent hydrogenation.