公开(公告)号：EP2061742A2

公开(公告)日：2009-05-27

申请号：EP07802811.5

申请日：2007-08-22

申请人： Evonik Stockhausen GmbH

发明人： BUB, Günther ,  MOSLER, Jürgen ,  KUPPINGER, Franz-Felix ,  SABBAGH, Andreas ,  STOCHNIOL, Guido ,  SAUER, Jörg ,  WINTERBERG, Markus ,  KNIPPENBERG, Udo ,  LATOSCHINSKI, Günter ,  FURNO, Franck

IPC分类号： C07C45/52 ,  C07C51/25 ,  B01J8/02 ,  B01J19/00 ,  C08F2/20 ,  C08F20/06 ,  C08F120/06 ,  C08F220/06 ,  C08L33/02 ,  C09D133/02 ,  C07C47/22 ,  C07C57/04

CPC分类号： B01J19/2415 ,  B01J8/025 ,  B01J8/22 ,  B01J10/002 ,  B01J19/006 ,  B01J19/32 ,  B01J2208/00176 ,  B01J2208/0053 ,  B01J2219/0004 ,  B01J2219/00081 ,  B01J2219/00094 ,  B01J2219/00159 ,  B01J2219/00768 ,  B01J2219/185 ,  B01J2219/1943 ,  B01J2219/32279 ,  B01J2219/32286 ,  C07C45/52 ,  C07C51/252 ,  C08F2/00 ,  C08F2/20 ,  C08F220/06 ,  C07C47/22 ,  C07C57/04

摘要： The invention relates to a method comprising at least the following steps: a) glycerin is dehydrated so as to obtain a dehydrated product containing acrolein; b) the dehydrated product is subjected to gas phase oxidation so as to obtain a monomer gas containing acrylic acid; c) the monomer gas is contacted with a quenching agent so as to obtain a quench phase containing acrylic acid; d) the quench phase is reprocessed so as to obtain a monomer phase containing acrylic acid. A liquid phase (a1) and a gas phase (a2) are provided during the dehydration process, a plurality of gas bubbles being produced in the liquid phase (a1). The invention further relates to a method for producing polymers by polymerizing acrylic acid, preferably for producing water-absorbing polymers, the water-absorbing polymers obtained by means of said method, a compound, a method for producing a compound, the compound obtained by means of said method, and other chemical products.