公开(公告)号：DK1523477T3

公开(公告)日：2006-01-16

申请号：DK03763731

申请日：2003-07-07

Applicant: BASF AG

Inventor： KAIBEL GERD ,  MERGER MARTIN ,  DOMSCHKE THOMAS ,  DECKERT PETRA ,  SAUER FRIEDRICH

IPC: C07D307/62

Abstract: The invention relates to a method for the separation of ascorbic acid from a mixture containing ascorbic acid and 2-keto-L-gulonic acid in a polar, preferably aqueous solvent, by means of liquid/liquid extraction using an amide. The method preferably also comprises steps for the back-extraction of the ascorbic acid, recycling of the extraction solvent and/or the back extraction solvent and for isolation of the ascorbic acid from the back extraction solvent. The invention further relates to a method for the production of ascorbic acid from KGA and isolation of the ascorbic acid so produced.

公开(公告)号：DE10260085A1

公开(公告)日：2004-07-01

申请号：DE10260085

申请日：2002-12-19

Applicant: BASF AG

Inventor： DOMSCHKE THOMAS ,  MERGER MARTIN ,  DECKERT PETRA ,  SAUER FRIEDRICH

IPC: C07D307/62 ,  C07H7/027 ,  C07C59/215 ,  B01D11/04

Abstract: 2-Keto-L-gulonic acid (KGA) is extracted from a polar solvent, by contacting the solvent with an extractant (E1) comprising a tertiary amine (I) and a polar organic diluent (II) in a mixing region. 2-Keto-L-gulonic acid (KGA) is extracted from a (preferably aqueous) polar solvent, by contacting the solvent with a first extractant (E1) comprising a tertiary amine of formula NR1R2R3 (I) and a polar organic diluent (II) in a mixing region. R1 - R3 = 6-14C (preferably 8-12C) alkyl. An Independent claim is also included for the production of ascorbic acid (AA), by at least partially lactonizing KGA, extracting KGA from the obtained AA/KGA mixture by the above method and isolating AA from the residual solution.

公开(公告)号：DE502005001142D1

公开(公告)日：2007-09-13

申请号：DE502005001142

申请日：2005-01-27

Applicant: BASF AG

Inventor： SCHEIDEL JENS ,  JUNGKAMP TIM ,  BARTSCH MICHAEL ,  HADERLEIN GERD ,  BAUMANN ROBERT ,  LUYKEN HERMANN ,  DECKERT PETRA ,  PFAB PETER ,  SIEGEL WOLFGANG ,  AECHTNER TOBIAS

IPC: C07F9/00 ,  C07C253/34 ,  C07C255/04 ,  C07F9/02

Abstract: A process for extractively removing nickel(0) complexes having phosphorus ligands and/or free phosphorus ligands from a reaction effluent of a hydrocyanation of unsaturated mononitriles to dinitriles by extraction by means of a hydrocarbon, a phase separation of the hydrocarbon and of the reaction effluent into two phases being effected at a temperature T (in ° C.), wherein the content of nickel(0) complexes having phosphorus ligands and/or free phosphorus ligands in the reaction effluent of the hydrocyanation, depending on the temperature T, is at least y % by weight and, irrespective of the temperature T, is a maximum of 60% by weight, where the numerical value of the minimum content y is given by the equation y=0.5.T+20 and T is to be used in the equation as a dimensionless numerical value.

公开(公告)号：BRPI0405871A

公开(公告)日：2006-09-05

申请号：BRPI0405871

申请日：2004-12-28

Applicant: BASF AG

Inventor： KAIBEL GERD ,  MERGER MARTIN ,  DOMSCHKE THOMAS ,  DECKERT PETRA ,  SAUER FRIEDRICH

IPC: C07D307/62

公开(公告)号：DE102004063381A1

公开(公告)日：2006-07-06

申请号：DE102004063381

申请日：2004-12-23

Applicant: BASF AG

Inventor： JUNGKAMP TIM ,  BAUMANN ROBERT ,  BARTSCH MICHAEL ,  HADERLEIN GERD ,  LUYKEN HERMANN ,  SCHEIDEL JENS ,  AECHTNER TOBIAS ,  PFAB PETER ,  DECKERT PETRA ,  SIEGEL WOLFGANG ,  BASLER PETER

IPC: C07C253/30 ,  B01J31/22 ,  B01J38/00 ,  C07C253/10 ,  C07C253/34 ,  C07C255/07

Abstract: Producing 3-pentenonitrile comprises isomerizing a 2-methyl-3-butenonitrile feed stream in the presence of a dissolved or dispersed catalyst, distilling the product stream to separate an overhead stream (2) from a catalyst-containing bottoms stream, distilling stream (2) to obtain an overhead stream enriched in (Z)-2-methyl-2-butenonitrile and a bottoms stream (5), and distilling stream (5) to produce a bottoms stream containing 3-pentenonitrile and an overhead stream containing 2-methyl-3-butenonitrile.

公开(公告)号：CA2554736A1

公开(公告)日：2005-08-11

申请号：CA2554736

申请日：2005-01-27

Applicant: BASF AG

Inventor： JUNGKAMP TIM ,  BAUMANN ROBERT ,  BARTSCH MICHAEL ,  LUYKEN HERMANN ,  HADERLEIN GERD ,  SCHEIDEL JENS ,  AECHTNER TOBIAS ,  PFAB PETER ,  DECKERT PETRA ,  BASSLER PETER ,  SIEGEL WOLFGANG

IPC: C07C253/10 ,  C07C255/07

Abstract: The invention relates to a method for producing 3-pentenenitrile, characterised by the following steps: (a) isomerisation of an educt stream containing 2-methyl-3-butenenitrile on at least one dissolved or dispersed isomerisation catalyst to form a stream (1), which contains the isomerisatio n catalyst(s), 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2- butenenitrile; (b) distillation of the stream (1) to obtain a stream (2) as the overhead product, which contains 2-methyl-3-butenenitrile, 3- pentenenitrile and (Z)-2-methyl-2-butenenitrile and a stream (3) as the bott om product, which contains the isomerisation catalyst(s); (c) distillation of t he stream (2) to obtain a stream (4) as the overhead product, which is enriched with (Z)-2-methyl-2-butenenitrile in comparison to stream (2), (in relation to the sum of all pentenenitriles in stream (2)) and a stream (5) as the bottom product, which is enriched with 3-pentenenitrile and 2-methyl-3-butenenitril e in comparison to stream (2), (in relation to the sum of all pentenenitriles in stream (2); (d) distillation of stream (5) to obtain a stream (6) as the bottom product, which contains 3-pentenenitrile and a stream (7) as the head product, which contains 2-methyl-3-butenenitrile.

公开(公告)号：CA2553778A1

公开(公告)日：2005-08-11

申请号：CA2553778

申请日：2005-01-27

Applicant: BASF AG

Inventor： AECHTNER TOBIAS ,  SIEGEL WOLFGANG ,  PFAB PETER ,  DECKERT PETRA ,  LUYKEN HERMANN ,  BAUMANN ROBERT ,  HADERLEIN GERD ,  BARTSCH MICHAEL ,  JUNGKAMP TIM ,  SCHEIDEL JENS

IPC: C07F9/00 ,  C07C253/34 ,  C07C255/04 ,  C07F9/02

Abstract: The invention relates to a method for the extractive separation of nickel(0) complexes and phosphorus-containing ligands and/or free phosphorus-containin g ligands from a reaction discharge of a hydrocyanation of unsaturated mononitries to dinitriles, by means of a hydrocarbon, the hydrocarbon and th e reaction discharge being separated into two phases at a temperature T (in ~C ). The invention is characterised in that the content of nickel(0) complexes an d phosphorus-containing ligands and/or free phosphorus-containing ligands in t he reaction discharge of the hydrocyanation is at least y wt. %, depending on t he temperature T, and a maximum of 60 wt. % independently of the temperature T. The numerical value of the minimum content y is indicated by the equation y = 0,5 T + 20, T being a dimensionless numerical value.

公开(公告)号：CA2510026A1

公开(公告)日：2004-07-08

申请号：CA2510026

申请日：2003-12-13

Applicant: BASF AG

Inventor： DOMSCHKE THOMAS ,  MERGER MARTIN ,  SAUER FRIEDRICH ,  DECKERT PETRA

IPC: C07H1/06 ,  C07H7/027

Abstract: The invention relates to a method for extracting 2-ketone-L-gulonic acids fr om a polar, preferably aqueous solvent, preferably from a solvent which contain s a mixture of ascorbic acid and 2-ketone-L-gulonic acid, by means of liquid- liquid extraction with the aid of an extraction agent which contains a tertiary amine and a polar organic diluent. Preferably, the inventive method also comprises steps for retro-extracting the 2-ketone-L-gulonic acid and fo r returning the extraction agent. The invention also relates to a method for producing ascorbic acid from 2-ketone-L-gulonic acid and for isolating the thus produced ascorbic acid.

公开(公告)号：DE10231890A1

公开(公告)日：2004-02-05

申请号：DE10231890

申请日：2002-07-12

Applicant: BASF AG

Inventor： KAIBEL GERD ,  MERGER MARTIN ,  DOMSCHKE THOMAS ,  DECKERT PETRA ,  SAUER FRIEDRICH

IPC: C07D307/62

Abstract: The invention relates to a method for the separation of ascorbic acid from a mixture containing ascorbic acid and 2-keto-L-gulonic acid in a polar, preferably aqueous solvent, by means of liquid/liquid extraction using an amide. The method preferably also comprises steps for the back-extraction of the ascorbic acid, recycling of the extraction solvent and/or the back extraction solvent and for isolation of the ascorbic acid from the back extraction solvent. The invention further relates to a method for the production of ascorbic acid from KGA and isolation of the ascorbic acid so produced.