公开(公告)号：AU2006245831B2

公开(公告)日：2011-02-24

申请号：AU2006245831

申请日：2006-05-03

Applicant: BASF AG

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

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：DE50306511D1

公开(公告)日：2007-03-29

申请号：DE50306511

申请日：2003-05-13

Applicant: BASF AG

Inventor： FRIESE KATRIN ,  RAULS MATTHIAS ,  FREYHOF REINHARD ,  FRIESE THORSTEN ,  ARMBRUSTER HARALD ,  ZEINER HARTMUT ,  EGBERS GITTA ,  STROEFER ECKHARD ,  HECK LUDWIG ,  HILDENBRAND PETER

IPC: C07D323/06

Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.

公开(公告)号：AT353883T

公开(公告)日：2007-03-15

申请号：AT03752664

申请日：2003-05-13

Applicant: BASF AG

Inventor： FRIESE KATRIN ,  RAULS MATTHIAS ,  FREYHOF REINHARD ,  FRIESE THORSTEN ,  ARMBRUSTER HARALD ,  ZEINER HARTMUT ,  EGBERS GITTA ,  STROEFER ECKHARD ,  HECK LUDWIG ,  HILDENBRAND PETER

IPC: C07D323/06

Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.

公开(公告)号：DE102005021056A1

公开(公告)日：2006-11-09

申请号：DE102005021056

申请日：2005-05-06

Applicant: BASF AG

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

IPC: C07C253/34 ,  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：PL374560A1

公开(公告)日：2005-10-31

申请号：PL37456003

申请日：2003-05-13

Applicant: BASF AG

Inventor： FRIESE KATRIN ,  RAULS MATTHIAS ,  FREYHOF REINHARD ,  FRIESE THORSTEN ,  ARMBRUSTER HARALD ,  ZEINER HARTMUT ,  EGBERS GITTA ,  STROEFER ECKHARD ,  HECK LUDWIG ,  HILDENBRAND PETER

IPC: C07D323/06

Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.

公开(公告)号：AU2003300226A1

公开(公告)日：2004-07-22

申请号：AU2003300226

申请日：2003-12-23

Applicant: BASF AG

Inventor： KINDLER ALOIS ,  LETZELTER THOMAS ,  FRANKE DIRK ,  FRIESE KATRIN ,  KNOLL CHRISTIAN

IPC: C07D213/67 ,  C07D498/08 ,  C07D498/18

公开(公告)号：AU2003232760A8

公开(公告)日：2003-12-02

申请号：AU2003232760

申请日：2003-05-13

Applicant: BASF AG

Inventor： HECK LUDWIG ,  HILDENBRAND PETER ,  EGBERS GITTA ,  FREYHOF REINHARD ,  ARMBRUSTER HARALD ,  STROFER ECKHARD ,  FRIESE KATRIN ,  FRIESE THORSTEN ,  RAULS MATTHIAS ,  ZEINER HARTMUT

IPC: C07D323/06

Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.

公开(公告)号：UA84524C2

公开(公告)日：2008-10-27

申请号：UAA200713658

申请日：2006-05-03

Applicant: BASF AG

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

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

公开(公告)号：AU2006245831A1

公开(公告)日：2006-11-16

申请号：AU2006245831

申请日：2006-05-03

Applicant: BASF AG

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

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：DE102004003145A1

公开(公告)日：2005-08-11

申请号：DE102004003145

申请日：2004-01-21

Applicant: BASF AG

Inventor： ALTHOEFER HENNING ,  ACHATZ BRIGITTE ,  FRIESE KATRIN

IPC: A23K1/16 ,  A23L33/15 ,  C12P17/12 ,  A23L1/302

Abstract: Production of vitamin B6 (I) involves: (a) preparing a fermentation broth containing (I) by culturing a suitable microorganism in a nutrient medium; (b) removing the cells to give a solution containing (I); (c) purifying (I) in the solution by (i) ion exchange chromatography (optionally at elevated temperature) or (ii) aqueous-aqueous two-phase extraction; or (d) optionally purifying the obtained (I)-containing fractions by crystallization. An independent claim is included for the isolation of (I) from an aqueous medium, by stages (c) and (d) as above.