公开(公告)号：EP1470099A4

公开(公告)日：2006-04-12

申请号：EP02797276

申请日：2002-12-11

Applicant: STALEY MFG CO A E

Inventor： COCKREM MICHAEL CHARLES MILNER ,  KOVACS ISTVAN ,  MOHAMEDNUR IDRIS ,  HEIDEL DAVID ,  BANIEL AVRAHAM M

IPC: C07C51/48 ,  C07C59/08

CPC classification number: C07C51/48 ,  C07C59/08

Abstract: A process is disclosed for purifying an aqueous feed stream (10) comtaining a product organic acid and a strong contaminant such as another organic acid. The molar concentration of the organic acid in the feed stream (10) is at least 20 times greater than that of the contaminant. The feed stream (10) is contacted with an immiscible basic extractant (18) that has a greater affinity for the contaminant and which complexes with the contaminant and some of the organic acid. The complexed extractant is separated from the aqueous stream (10), so as to produce a first effluent stream (20) comprising product organic acid. The complexed extractant is contacted with a displacing acid, for which the extractant has a greater affinity than contaminant or extractant. As a result, a second effluent stream (28) comprising organic acid and a third effluent stream (30) are produced.

公开(公告)号：AU2002362143A1

公开(公告)日：2003-07-30

申请号：AU2002362143

申请日：2002-12-11

Applicant: STALEY MFG CO A E

Inventor： MOHAMEDNUR IDRIS ,  HEIDEL DAVID ,  BANIEL AVRAHAM M ,  COCKREM MICHAEL CHARLES MILNER ,  KOVACS ISTVAN

IPC: C07C51/48 ,  C07C59/08

公开(公告)号：BR0215459A

公开(公告)日：2005-04-05

申请号：BR0215459

申请日：2002-12-11

Applicant: STALEY MFG CO A E

Inventor： COCKREM MICHAEL CHARLES MILNER ,  KOVACS ISTVAN ,  MOHAMEDNUR IDRIS ,  HEIDEL DAVID ,  BANIEL AVRAHAM M

IPC: C07C51/48 ,  C07C59/08

公开(公告)号：CA2470978A1

公开(公告)日：2003-07-24

申请号：CA2470978

申请日：2002-12-11

Applicant: STALEY MFG CO A E

Inventor： HEIDEL DAVID ,  MOHAMEDNUR IDRIS ,  COCKREM MICHAEL CHARLES MILNER ,  KOVACS ISTVAN ,  BANIEL AVRAHAM M

IPC: C07C51/48 ,  C07C59/08

Abstract: A process is disclosed for purifying an aqueous feed stream (10) comtaining a product organic acid and a strong contaminant such as another organic acid. The molar concentration of the organic acid in the feed stream (10) is at least 20 times greater than that of the contaminant. The feed stream (10) is contacted with an immiscible basic extractant (18) that has a greater affini ty for the contaminant and which complexes with the contaminant and some of the organic acid. The complexed extractant is separated from the aqueous stream (10), so as to produce a first effluent stream (20) comprising product organ ic acid. The complexed extractant is contacted with a displacing acid, for whic h the extractant has a greater affinity than contaminant or extractant. As a result, a second effluent stream (28) comprising organic acid and a third effluent stream (30) are produced.