公开(公告)号：AT486836T

公开(公告)日：2010-11-15

申请号：AT02767312

申请日：2002-08-02

Applicant: BASF SE

Inventor： FUCHS EBERHARD ,  MARTAN HANS ,  NESTLER GERHARD ,  MUELLER-ENGEL KLAUS

IPC: C07C51/25 ,  C07C51/215 ,  C07C51/235 ,  C07C51/43 ,  C07C51/44 ,  C07C51/487 ,  C07C57/05 ,  C07C57/07

Abstract: Process for preparation of a water absorbing resin from acrylic acid by its absorption from the reaction gases from catalytic gas phase oxidation of propane, propylene and/or acrolein in an absorption liquid or by separation of the crude acid from the reaction gases by fractional condensation, purification by crystallization, treatment of the crude acrylic acid with an aldehyde trap, (c) separation of pure acrylic acid by distillation, and its radical polymerization is new. A process for preparation of a water absorbing resin involving:(a) production of crude acrylic acid either (a) absorption of acrylic acid from the reaction gases from the catalytic gas phase oxidation of propane, propylene and/or acrolein in an absorption liquid and isolation of crude acrylic acid from acrylic acid loaded absorption liquid, or (a2) by separation of crude acrylic acid from the reaction gases by fractional condensation, and purification by crystallization, (b) treatment of the crude acrylic acid with an aldehyde trap, (c) separation of pure acrylic acid from the crude acrylic acid by distillation, and (d) radical polymerization, optionally after partial neutralization, optionally mixed with other ethylenically unsaturated monomers, of the pure acrylic acid.

公开(公告)号：DE502004010115D1

公开(公告)日：2009-11-05

申请号：DE502004010115

申请日：2004-07-09

Applicant: BASF SE

Inventor： ECK BERND ,  HAMMON ULRICH ,  MUELLER-ENGEL KLAUS JOACHIM ,  SCHROEDER JUERGEN ,  THIEL JOACHIM ,  MARTAN HANS

IPC: C07C51/43 ,  B01D3/14 ,  B01D3/32 ,  C07C51/215 ,  C07C51/25 ,  C07C51/44

Abstract: A thermal separating process for removing a stream containing enriched (meth)acrylic monomers from a mixture containing (meth)acrylic monomers, in which the liquid phases retained in the separating space at high temperature and high (meth)acrylic monomer content are minimized.

公开(公告)号：DE50214752D1

公开(公告)日：2010-12-16

申请号：DE50214752

申请日：2002-08-02

Applicant: BASF SE

Inventor： FUCHS EBERHARD ,  MARTAN HANS ,  NESTLER GERHARD ,  MUELLER-ENGEL KLAUS JOACHIM

IPC: C07C51/25 ,  C07C51/215 ,  C07C51/235 ,  C07C51/43 ,  C07C51/44 ,  C07C51/487 ,  C07C57/05 ,  C07C57/07 ,  C07C57/075 ,  C08F220/00

公开(公告)号：AT443694T

公开(公告)日：2009-10-15

申请号：AT04740862

申请日：2004-07-09

Applicant: BASF SE

Inventor： ECK BERND ,  HAMMON ULRICH ,  MUELLER-ENGEL KLAUS ,  SCHROEDER JUERGEN ,  THIEL JOACHIM ,  MARTAN HANS

IPC: C07C51/43 ,  B01D3/14 ,  B01D3/32 ,  C07C51/215 ,  C07C51/25 ,  C07C51/44

Abstract: A thermal separating process for removing a stream containing enriched (meth)acrylic monomers from a mixture containing (meth)acrylic monomers, in which the liquid phases retained in the separating space at high temperature and high (meth)acrylic monomer content are minimized.