公开(公告)号：ES2215932T3

公开(公告)日：2004-10-16

申请号：ES01976093

申请日：2001-08-16

Applicant: BASF AG

Inventor： ISAK HEINZ ,  SENDHOFF NORBERT ,  SCHITZ FRANZ ,  THERRE JIRG ,  DRIGEMILLER MICHAEL ,  FRANKE DIRK

IPC: A01N25/12 ,  A01N43/88 ,  C07D285/34

Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.

公开(公告)号：ES2215730T3

公开(公告)日：2004-10-16

申请号：ES00966145

申请日：2000-10-10

Applicant: BASF AG

Inventor： THERRE JIRG ,  KRAMER ANDREAS ,  WEIPER-IDELMANN ANDREAS ,  SCHULIK MICHAEL ,  BENFER REGINA ,  SCHOSSIG JURGEN

IPC: C07B61/00 ,  C07C45/62 ,  C07C45/73 ,  C07C45/74 ,  C07C47/228 ,  C07C47/232

Abstract: The present invention relates to a continuous process for the preparation of cinnamaldehyde or cinnamaldehyde derivatives by continuous reaction of benzaldehyde derivatives with alkanals in the presence of bases and optionally subsequent continuous hydrogenation in a circulation reactor in the presence of a suspension catalyst and hydrogen to give dihydrocinnamaldehyde derivatives.