公开(公告)号：DE19818340A1

公开(公告)日：1999-10-28

申请号：DE19818340

申请日：1998-04-23

Applicant: BASF AG

Inventor： FISCHER ROLF ,  KAIBEL GERD ,  PINKOS ROLD ,  RAHN RALF-THOMAS

IPC: C07B61/00 ,  C07C29/136 ,  C07C29/149 ,  C07C29/88 ,  C07C31/20 ,  C07D307/08 ,  C07D307/33 ,  C07D315/00 ,  C07C29/147 ,  C07C51/16 ,  C07C29/74 ,  C07D307/60 ,  C07B41/00

Abstract: Production of butan-1,4-diol (I), tetrahydrofuran (THF) and psi -butyrolactone (GBL) involves: (i) oxidation of butane to a product stream containing maleic anhydride (II); (ii) absorption of (II) with a high-boiling alcohol (III), giving a liquid absorption discharge (IV) containing maleic half and diesters and (III); (iii) further esterification of (IV); and (iv) liquid phase hydrogenation of the esterification discharge (V). The novel features are that (III) is a polyol with a boiling point of over 233 deg C at normal pressure; and (V) has an acid number less than 30 mg KOH/g and water content less than 1 wt. %.