公开(公告)号：ZA200505413B

公开(公告)日：2007-02-28

申请号：ZA200505413

申请日：2005-07-05

Applicant: BASF AG

Inventor： MARK ELLIOT ,  MICHAEL EXNER KAI ,  KAREN BENNETT ANDREA ,  CIPRIAN JUERGEN

IPC: A61L20090101 ,  A61L15/60 ,  C07C20090101 ,  C07C51/47 ,  C08F20090101 ,  C08F20/06

Abstract: A process for the reduction of the concentration of methoxyhydroquinone (MEHQ) in acrylic acid that is neutralized to 75-100% comprises continuous adsorption on activated carbon. An Independent claim is included for a process for the production of superabsorbers (I) by reduction of the MEHQ content by the novel process followed by polymerization, optionally with non-neutralized acrylic acid with optionally surface cross-linking.

公开(公告)号：ZA200403357B

公开(公告)日：2005-05-04

申请号：ZA200403357

申请日：2004-05-04

Applicant: BASF AG

Inventor： DANIEL THOMAS ,  MASSONNE KLEMENS ,  MICHAEL EXNER KAI ,  RIEGEL ULRICH ,  WEISMANTEL MATTHIAS

IPC: B65D65/02 ,  A61L15/00 ,  A61L15/60 ,  C07D265/32 ,  C08F8/30 ,  C08K5/357 ,  C08L101/14 ,  C08F ,  A61L

Abstract: The invention relates to a method for gel post-crosslinking or surface post-crosslinking water-absorbing hydogels with morpholine-2,3-diones, to the post-crosslinked hydrogels and to the use thereof.