公开(公告)号：DE4326953A1

公开(公告)日：1995-02-16

申请号：DE4326953

申请日：1993-08-11

Applicant: BASF AG

Inventor： LECHTKEN PETER DR ,  SAUER FRIEDRICH ,  FANKHAENEL MATTHIAS DR ,  HERMELING DIETER DR

IPC: C07F9/50 ,  C07F19/00 ,  C07F5/06

Abstract: Triphenylphosphine (TPP) is obtained from a solution of a triphenylphosphine-aluminium chloride complex in chlorobenzene by decomplexation, hydrolysis and extraction by means of water and subsequent separation of the liquid/liquid dispersion - consisting of a chlorobenzene phase containing TPP and a water phase containing Al and Cl compounds - into a chlorobenzene phase containing TPP and into a TPP-free water phase containing Al and Cl compounds, characterised by - dispersing water in the chlorobenzene phase in a 1st mixing device in the ratio of 0.6 to 0.95 kg of water per kg of chlorobenzene solution such that as a result of the hydrolysis a temperature in the range from 60 to 90 DEG C is established, residence times of 5 to 30 minutes and energy densities of 2 to 10 kW/m being kept to during dispersing, - redispersing in a 2nd mixing device, residence times of 5 to 60 minutes and energy densities of 0.05 to 0.5 kW/m being kept to, and separating into the specifically heavier chlorobenzene phase containing TPP and into the specifically lighter TPP-free water phase containing Al and Cl compounds by means of a phase-separating vessel.

公开(公告)号：DE59407836D1

公开(公告)日：1999-04-01

申请号：DE59407836

申请日：1994-08-04

Applicant: BASF AG

Inventor： LECHTKEN PETER DR ,  SAUER FRIEDRICH ,  FANKHAENEL MATTHIAS DR ,  HERMELING DIETER DR

IPC: C07F9/50

Abstract: Triphenylphosphine (TPP) is obtained from a solution of a triphenylphosphine-aluminium chloride complex in chlorobenzene by decomplexation, hydrolysis and extraction by means of water and subsequent separation of the liquid/liquid dispersion - consisting of a chlorobenzene phase containing TPP and a water phase containing Al and Cl compounds - into a chlorobenzene phase containing TPP and into a TPP-free water phase containing Al and Cl compounds, characterised by - dispersing water in the chlorobenzene phase in a 1st mixing device in the ratio of 0.6 to 0.95 kg of water per kg of chlorobenzene solution such that as a result of the hydrolysis a temperature in the range from 60 to 90 DEG C is established, residence times of 5 to 30 minutes and energy densities of 2 to 10 kW/m being kept to during dispersing, - redispersing in a 2nd mixing device, residence times of 5 to 60 minutes and energy densities of 0.05 to 0.5 kW/m being kept to, and separating into the specifically heavier chlorobenzene phase containing TPP and into the specifically lighter TPP-free water phase containing Al and Cl compounds by means of a phase-separating vessel.

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.