公开(公告)号：DE59709132D1

公开(公告)日：2003-02-20

申请号：DE59709132

申请日：1997-09-04

Applicant: BASF AG

Inventor： MERCKER DR ,  PAPE DR ,  SIMON DR ,  HENNE DR ,  HESSE DR ,  KOEHLER DR ,  DOSTALEK DR ,  FREIRE ERDBRUEGGER DR ,  KRATZ DR

IPC: C07D307/33 ,  B01J23/72 ,  B01J23/78 ,  C07B61/00 ,  C07D307/32 ,  C07D315/00

Abstract: Gas phase dehydration of butan-1,4-diol (I) to gamma -butyrolactone (II) is carried out in the presence of a catalyst (III) containing copper (Cu), which contains 4-40 wt.% Cu and 0-5 wt.% sodium oxide (Na2O) on a support of 80-100 wt.% silica (SiO2) and 0-20 wt.% calcium oxide (CaO). Also claimed is catalyst (III) per se.

公开(公告)号：DE59809861D1

公开(公告)日：2003-11-20

申请号：DE59809861

申请日：1998-12-22

Applicant: BASF AG

Inventor： BEER DR ,  BEISER KLAUS ,  CIPRIAN DR ,  FRANZ DR ,  FRANZISCHKA DR ,  PALM DR ,  PAPE DR ,  PAUL DR ,  PESSEL ULRICH-DIETER ,  WECK ALEXANDER

IPC: B01J39/04 ,  B01J39/05 ,  B01J47/02 ,  B01J47/026 ,  B01J49/00 ,  B01J49/06 ,  C08F6/08 ,  C08G65/20 ,  C08G65/30 ,  C08G65/331 ,  C08J5/20

Abstract: The production of a hydroxyl group containing polymer, preferably polytetrahydrofuran, by ester exchange of the corresponding acyloxy group containing polymer with alcohol in the presence of a sodium containing catalyst involves separation of the sodium cation using a catalytic amount of water by passage through an ion exchange material.