公开(公告)号：ES2044730T3

公开(公告)日：1994-01-01

申请号：ES92105033

申请日：1992-03-24

Applicant: BASF AG

Inventor： KOHLHAUPT REINHOLD DR ,  GAENG MANFRED DR ,  BIEG WALTER ,  FANKHAENEL MATTHIAS DR ,  HAAS LOTHAR ,  ENGELHARDT GUENTER DR

IPC: C07D209/36 ,  C09B7/02

Abstract: A process for the preparation of purified indigo comprises extracting the aqueous alkaline indoxylate solution arising from the synthesis with an inert water-insoluble solvent in the absence of oxygen before oxidizing the indoxylate solution to give indigo.

公开(公告)号：DE59200014D1

公开(公告)日：1993-11-04

申请号：DE59200014

申请日：1992-03-24

Applicant: BASF AG

Inventor： KOHLHAUPT REINHOLD DR ,  GAENG MANFRED DR ,  BIEG WALTER ,  FANKHAENEL MATTHIAS DR ,  HAAS LOTHAR ,  ENGELHARDT GUENTER DR

IPC: C07D209/36 ,  C09B7/02

Abstract: A process for the preparation of purified indigo comprises extracting the aqueous alkaline indoxylate solution arising from the synthesis with an inert water-insoluble solvent in the absence of oxygen before oxidizing the indoxylate solution to give indigo.