公开(公告)号：CA2181528A1

公开(公告)日：1997-01-20

申请号：CA2181528

申请日：1996-07-18

Applicant: HOECHST AG

Inventor： ARNOLD DIETER ,  HIERHOLZER BERNHARD ,  MUECK KARL-FRIEDRICH ,  REIBETA MONIKA ,  RICHTER PETER ,  SCHNABEL HANS-DIETMAR ,  WLOCH HUBERT

IPC: A01N43/32 ,  C07D323/06 ,  A61L2/18 ,  C07C43/303 ,  B01D3/36 ,  C07C41/50

Abstract: The invention relates to a process for removing trioxane from a liquid mixture containing trioxane, water and formaldehyde, which comprises distilling the liquid mixture in a first distillation stage at a low pressure, distilling the resulting distillate in a second distillation stage at a higher pressure and taking off trioxane as bottom product.

公开(公告)号：BR9603115A

公开(公告)日：1998-05-05

申请号：BR9603115

申请日：1996-07-17

Applicant: HOECHST AG

Inventor： SCHNABEL DIETER ,  RICHTER PETER ,  REISS MONIKA ,  MUCK KARL-FRIEDRICH ,  WLOCH HUBERT ,  HIERHOLZER BERNHARD ,  SCHNABEL HANS-DIETMAR ,  ARNOLD DIETER

IPC: A01N43/32 ,  C07D323/06

Abstract: In process and assembly to separate trioxane from a mixture of liquids also containing water and formaldehyde, the novelty is that the mixture is first distilled at low pressure and the resulting distillate is then distilled again at a higher pressure to produce trioxane as the sump residue. The lower pressure and the higher pressure are in the range 0.1 to 20 bar (absolute), pref. approx. 0.5 bar for the lower pressure and approx. 6 bar for the higher pressure. Further claimed is that the trioxane is subsequently used as a disinfectant or for the production of polyoxymethylenes or polyvalent alcohols. A suitable assembly incorporates two distillation columns linked in series in which the head of the first is linked to the central section of the second, and the head of the second column is linked to the central section of the first.

公开(公告)号：MX9602849A

公开(公告)日：1998-04-30

申请号：MX9602849

申请日：1996-07-18

Applicant: HOECHST AG

Inventor： ARNOLD DIETER ,  HIERHOLZER BERNHARD ,  MUCK KARL-FRIEDRICH ,  REISS MONIKA ,  RICHTER PETER ,  SCHNABEL HANS-DIETMAR ,  WLOCH HUBERT

IPC: A01N43/32 ,  C07D323/06

Abstract: La presente invencion se refiere a un procedimiento para separar trioxano de una mezcla líquida que contiene trioxano, agua y formaldehído, caracterizado porque la mezcla líquida se destila en una primera etapa de destilacion a baja presion, el destilado resultante se destila en una segunda eta de destilacion a una presion mayor y el trioxano se recoge como producto de cola.