公开(公告)号：PL1883623T3

公开(公告)日：2011-09-30

申请号：PL06754975

申请日：2006-05-03

Applicant: BASF SE

Inventor： OFTRING ALFRED ,  JUDAT BERND ,  RAULS MATTHIAS ,  FRIESE KATRIN

IPC: C07C253/34 ,  C07C255/24 ,  C07C255/25

公开(公告)号：DK1883623T3

公开(公告)日：2011-07-25

申请号：DK06754975

申请日：2006-05-03

Applicant: BASF SE

Inventor： OFTRING ALFRED ,  JUDAT BERND ,  RAULS MATTHIAS ,  FRIESE KATRIN

IPC: C07C253/34 ,  C07C255/24 ,  C07C255/25

公开(公告)号：AT506344T

公开(公告)日：2011-05-15

申请号：AT06754975

申请日：2006-05-03

Applicant: BASF SE

Inventor： OFTRING ALFRED ,  JUDAT BERND ,  RAULS MATTHIAS ,  FRIESE KATRIN

IPC: C07C253/34 ,  C07C255/24 ,  C07C255/25

Abstract: The invention relates to a process for isolating methylglycinenitrile-N,N-diacetonitrile (MGDN) from an aqueous emulsion which comprises MGDN and has an MGDN content of 3-50% by weight in a crystallizer, comprising the steps: (a) the aqueous emulsion is, starting from a temperature above the solidification point, cooled to a temperature below the solidification point, the cooling rate averaged over time not exceeding 5 K/h, until substantially the entirety of the emulsified MGDN has solidified, (b) the resulting aqueous suspension is cooled further and/or concentrated, and the cooling rate may be greater than in step (a).

公开(公告)号：CA2746571A1

公开(公告)日：2010-07-08

申请号：CA2746571

申请日：2009-12-15

Applicant: BASF SE

Inventor： PETERS JARREN ,  DISTELDORF WALTER ,  FRIESE KATRIN ,  SCHAEFER THOMAS ,  BEY OLIVER

IPC: C07C67/08 ,  B01D3/36 ,  C07C69/00 ,  C07C69/80

Abstract: The invention relates to a method for producing carboxylic acid esters by reacting a reaction mixture, comprising a carboxylic acid and/or a carboxylic acid anhydride, and an alcohol in a reaction system having one or more reactors, wherein reaction water is distilled off as an alcohol/water azeotrope with the exhaust vapor. In addition, the reaction mixture is treated with superheated alcohol vapor. The method allows the production of esters having a low acid number.