公开(公告)号：AT489153T

公开(公告)日：2010-12-15

申请号：AT03762574

申请日：2003-07-02

Applicant: BASF SE

Inventor： HAMMON ULRICH ,  THIEL JOACHIM ,  SCHLIEPHAKE VOLKER ,  SCHROEDER JUERGEN

IPC: B01D3/22 ,  C07C51/44

Abstract: A process for rectificatively separating at least one (meth)acrylic monomer-containing fluid by feeding the fluid into a rectification column containing at least one sieve tray without a runoff segment, wherein an elementary cell is obtained from a number of centers of passages in a sieve tray, and the cell shifts regularly and repeatedly along its edges, the lengths of two shifting vectors being the lengths of the edges of the cell along which the shifting is effected; an arrangement of the centers is such that the positions of an ideal center and a real center are separated by

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：CA2673572A1

公开(公告)日：2008-07-31

申请号：CA2673572

申请日：2008-01-23

Applicant: BASF SE

Inventor： KIRSCHBAUM JULIA ,  STROEFER ECKHARD ,  SIEGERT MARKUS ,  THIEL JOACHIM ,  LANG NEVEN

IPC: B01D3/14 ,  C07D323/06

Abstract: The invention relates to a method for separating trioxane from an inlet f low (I) consisting of formaldehyde, trioxane and water. Said method consists in a) preparing an inlet flow (I), which contains formaldehyde as the main component and trioxane and water as auxiliary components, b) feeding the inl et flow (I), a return flow (V) and a return flow (VII), containing formaldeh yde as the main component and trioxane and water auxiliary components, into a first distillation step and distilling it at a pressure of between 0.1 to 2.5 bars, thus enabling a flow (II), which contains formaldehyde as the main component and water as the auxiliary component, and a flow (III), which con tains trioxane as the main component and water and formaldehyde as the auxil iary components, and a flow (X), which contains water, trioxane and formalde hyde to be obtained, c) distilling the flow (III), optionally after separati ng materials at a low-boiling point from the flow (III) in a low-boiling sep aration step and in a second distillation step at a pressure of between 0.2 to 17. 5 bars, whereby the pressure in the second distillation step is 0.1 t o 15 bars higher that the pressure in the first distillation step. A flow (I V) is obtained which is essentially made of trioxane, and also a return flow (V), which contains trioxane as the main component and water and formaldehy de as the auxiliary components, d) feeding the flow (X) and optionally a flo w (IX), which contains water as the main component, into a third distillatio n step and distilling it at a pressure of between 1 to 10 bars, whereby a fl ow (VI), which is essentially made of water, and a return flow (VII), which contains formaldehyde as the main component and water and trioxane as the au xiliary components, are obtained.