公开(公告)号：DE69803854T2

公开(公告)日：2002-09-26

申请号：DE69803854

申请日：1998-08-11

Applicant: RHONE POULENC CHIMIE

Inventor： MARION PHILIPPE ,  LE BRIS LOUIS ,  BERROD GERARD ,  DOVERGNE GEORGES ,  PERRONA PHILIPPE

IPC: C07C201/16 ,  C07C205/06

Abstract: The invention concerns a method for treating an aqueous solution derived from sluicing of crude mononitrated or dinitrated aromatic compounds obtained by nitration of the corresponding aromatic compounds, consisting in: (a) contacting said aqueous solution with said aromatic compound thereby obtaining an aqueous phase and an organic phase; (b) recycling said organic phase in the nitration process; (c) distilling said aqueous phase; (d) recycling the resulting concentrated acid solution in the nitration process; (e) recycling or eliminating the recuperated water after distillation.

公开(公告)号：DE69803854D1

公开(公告)日：2002-03-21

申请号：DE69803854

申请日：1998-08-11

Applicant: RHONE POULENC CHIMIE

Inventor： MARION PHILIPPE ,  LE BRIS LOUIS ,  BERROD GERARD ,  DOVERGNE GEORGES ,  PERRONA PHILIPPE

IPC: C07C201/16 ,  C07C205/06

Abstract: The invention concerns a method for treating an aqueous solution derived from sluicing of crude mononitrated or dinitrated aromatic compounds obtained by nitration of the corresponding aromatic compounds, consisting in: (a) contacting said aqueous solution with said aromatic compound thereby obtaining an aqueous phase and an organic phase; (b) recycling said organic phase in the nitration process; (c) distilling said aqueous phase; (d) recycling the resulting concentrated acid solution in the nitration process; (e) recycling or eliminating the recuperated water after distillation.

公开(公告)号：FR2767319B1

公开(公告)日：1999-10-29

申请号：FR9710346

申请日：1997-08-13

Applicant: RHONE POULENC CHIMIE

Inventor： MARION PHILIPPE ,  LE BRIS LOUIS ,  BERROD GERARD ,  DOVERGNE GEORGES ,  PERRONA PHILIPPE

IPC: C07C201/16 ,  C02F1/26 ,  C02F1/04

Abstract: The invention concerns a method for treating an aqueous solution derived from sluicing of crude mononitrated or dinitrated aromatic compounds obtained by nitration of the corresponding aromatic compounds, consisting in: (a) contacting said aqueous solution with said aromatic compound thereby obtaining an aqueous phase and an organic phase; (b) recycling said organic phase in the nitration process; (c) distilling said aqueous phase; (d) recycling the resulting concentrated acid solution in the nitration process; (e) recycling or eliminating the recuperated water after distillation.

公开(公告)号：FR2767319A1

公开(公告)日：1999-02-19

申请号：FR9710346

申请日：1997-08-13

Applicant: RHONE POULENC CHIMIE

Inventor： MARION PHILIPPE ,  LE BRIS LOUIS ,  BERROD GERARD ,  DOVERGNE GEORGES ,  PERRONA PHILIPPE

IPC: C07C201/16 ,  C02F1/26 ,  C02F1/04

Abstract: The treatment of an aqueous solution resulting from sluicing of crude mononitrated or dinitrated aromatic compounds obtained by nitration of the corresponding aromatic compounds is carried out by: (a) contacting the aqueous solution with the aromatic compound resulting in an aqueous phase and an organic phase; (b) recycling of the organic phase in the nitration process; (c) distilling the aqueous phase; (d) recycling the resulting concentrated acid solution in the nitration process; (e) recycling or eliminating the recovered water after distillation. The contact of the aqueous solution with the aromatic compound is carried out in a mixer or in an extraction column in which the aqueous solution is fed at the head of the column and the aromatic compound at the foot of the column. Part of the aromatic compound is recycled in the same mixer unit and the other part is fed in another mixer unit located before or after, depending on whether the chosen extraction mode is counter-current or not. The distillation (step (c) is carried out using a column so as to obtain an acid solution of total concentration in acid comprising of 30-75%.