公开(公告)号：DE50204155D1

公开(公告)日：2005-10-13

申请号：DE50204155

申请日：2002-06-29

Applicant: BASF AG

Inventor： RAULS DR ,  VAN GELDER DR ,  WAGNER DR ,  BERNARD DR

IPC: B01D9/02 ,  B01D9/00 ,  C07C403/00 ,  C07C403/08 ,  C07C403/14 ,  C07C403/20

Abstract: Production of crystals with an average particle size below 100 micro m comprises crystallizing a compound from a solution or suspension while exposing it to ultrasound directly applied through a sonotrode and while maintaining a specific stirring power.

公开(公告)号：DE59801060D1

公开(公告)日：2001-08-30

申请号：DE59801060

申请日：1998-03-11

Applicant: BASF AG

Inventor： SCHLAEFER DR ,  MAUSS DR ,  RAULS DR ,  BAUMANN DIETER

IPC: C01D1/30

Abstract: Production of crystalline NaOH . 3.5H2O, involves crystallising NaOH.3.5H2O from an aqueous NaOH solution oversaturated with NaOH . 3.5H2O, and removing the crystals using a mechanical solid/liquid separator. The solid/liquid separation occurs under conditions in which crystalline NaOH.3.5H2O can be liberated from the lye residues; the NaCl content of the crystalline NaOH . 3.5H2O being ≤ 100 mg per kg.

公开(公告)号：DE59708547D1

公开(公告)日：2002-11-28

申请号：DE59708547

申请日：1997-08-21

Applicant: BASF AG

Inventor： GRIMMER KARL ,  PURUCKER DR ,  DITTMAR DR ,  RAULS DR ,  MECKL DR

IPC: B01D53/14 ,  B01D53/56 ,  B01D53/58 ,  B01D53/68 ,  B01D53/78

公开(公告)号：DE50000116D1

公开(公告)日：2002-04-04

申请号：DE50000116

申请日：2000-07-06

Applicant: BASF AG

Inventor： RIECHERS DR ,  HOEHN DR ,  SIMON DR ,  LANG ORTMUND ,  SCHOENMAKERS DR ,  RAULS DR ,  CLAERBOUT KOEN

IPC: C07D471/08 ,  C07D487/08

Abstract: Preparation of a solution of pure triethylenediamine (TEDA) comprises vaporizing TEDA and passing the TEDA vapor into a liquid solvent. An Independent claim is also included for the preparation of pure TEDA by preparing the solution as above and crystallizing TEDA from this solution.

公开(公告)号：DE59703774D1

公开(公告)日：2001-07-19

申请号：DE59703774

申请日：1997-11-03

Applicant: BASF AG

Inventor： SCHOENHERR DR ,  RAULS DR ,  ASCHERL HERMANN ,  LETZELTER THOMAS ,  BAUMANN DIETER ,  POTTHOFF-KARL DR

IPC: C11D1/04 ,  C07C227/42 ,  C07C229/16 ,  C07C229/24

Abstract: A method for the preparation of a crystalline solid comprising a glycine-N,N-diacetic acid derivative of formula (I) with a very low hygroscopicity, comprises fixing the water content of the starting material containing (I) at 10-30 wt.% and then carrying out crystallisation: MOOC-CH(R)-N(CH2COOM)2 (I) R = 1-30C alkyl or 2-30C alkenyl (both optionally containing 1-5 OH, formyl, 1-4C alkoxy(carbonyl) or phenoxy groups and/or optionally containing up to 5 non-adjacent O atoms in the chain), alkoxylate groups of formula (II), phenyl-(1-20 C)-alkyl (optionally containing up to 3 1-4C alkyl, OH, carboxyl, sulpho or 1-4C alkoxycarbonyl ring substituents), 5- or 6-membered optionally benzalated heterocyclic ring containing up to 3 N, O or S atoms (optionally containing up to 3 1-4C alkyl, OH, carboxyl, sulpho or 1-4C alkoxycarbonyl substituents) or a group of formula (III): -(CH2)k-O-(A O)m-(A O)n-Y (II) -A-CH(COOM)-N(CH2COOM)2 (III) A , A = 2-4C 1,2-alkylene; Y = H, 1-12C alkyl, phenyl or 1-4C alkoxycarbonyl; k = 1-3; m, n = 0-50; A = 1-12C alkylene or single bond; and M = H, alkali(ne earth) metal or optionally substituted ammonium, with the provision that m+n = at least 4.