中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

29 records (took 0.023 seconds)

    11.
    发明专利
    未知

    公开(公告)号：BR0003180A

    公开(公告)日：2001-03-13

    申请号：BR0003180

    申请日：2000-07-27

    Applicant: BASF AG

    Inventor： DECKERT PETRA ,  HERBST HOLGE

    IPC: C07C67/08

    Abstract: A process for the continuous preparation of acrylates of (meth)acrylic acid by reaction of (meth)acrylic acid with alkanols of 4 to 8 carbon atoms in an esterification zone is proposed, in which the reaction mixture removed from the esterification zone is first fed to a three-stage prepurification and then worked up by rectification for isolating the desired ester.

    12.
    发明专利
    未知

    公开(公告)号：AT368676T

    公开(公告)日：2007-08-15

    申请号：AT05701205

    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.

    13.
    发明专利
    未知

    公开(公告)号：BRPI0507258A

    公开(公告)日：2007-06-26

    申请号：BRPI0507258

    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.

    14.
    发明专利
    未知

    公开(公告)号：DE10231890B4

    公开(公告)日：2004-07-01

    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 ,  C07C59/215

    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.

    Continuous production of alkyl (meth)acrylate, useful for producing aqueous polymer dispersions, e.g. adhesive, uses 3-stage pre-purification of reaction mixture, with final extraction with water to remove salts
    15.
    发明专利
    Continuous production of alkyl (meth)acrylate, useful for producing aqueous polymer dispersions, e.g. adhesive, uses 3-stage pre-purification of reaction mixture, with final extraction with water to remove salts 未知

    公开(公告)号：DE19935453A1

    公开(公告)日：2000-10-19

    申请号：DE19935453

    申请日：1999-07-28

    Applicant: BASF AG

    Inventor： DECKERT PETRA ,  HERBST HOLGER

    IPC: C07C67/08 ,  C07C67/54 ,  C07C69/54

    Abstract: Alkyl (meth)acrylates (I) is produced by reacting (meth)acrylic acid, 4-8 carbon alkanol and a strongly acid esterification catalyst (IV) in a solvent-free phase in a rectification unit; and pre-purification of the mixture containing (I) by extracting most of (IV) with water and reactive extraction with aqueous alkali solution and then with water to remove residual salts and aqueous impurities. Continuous production of alkyl (meth)acrylates (I) by elevated temperature reaction in a solvent-free phase involves: (a) feeding (meth)acrylic acid (II), 4-8 carbon (C) alkanol (III) and a strongly acid esterification catalyst (IV) to a reaction zone, (b) separating the water formed during a residence time in a first rectification unit acting as reaction zone; (c) separating the resultant distillate into an organic phase containing (III) and an aqueous phase, (d) recycling the organic phase to the rectification unit, and (e) discharging the reaction mixture containing (I) from the reaction zone and passing it to pre-purification. Pre-purification involves: (i) separating most of (IV) by extraction with water; and (ii) reactive extraction with aqueous alkali solution to neutralize and extract the strongly acid components. The remaining organic reaction mixture is then passed to a separation zone comprising other rectification units, in which (I) is separated. The novelty is that the organic reaction mixture leaving the second pre-purification stage is extracted with water to remove residual salts and aqueous impurity fractions before it is passed to the separation zone. An Independent claim is also included for the equipment used for pre-purification.

    16.
    发明专利
    未知

    公开(公告)号：BRPI0507197B1

    公开(公告)日：2014-12-30

    申请号：BRPI0507197

    申请日：2005-01-27

    Applicant: BASF AG

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

    IPC: C07C253/10 ,  C07C255/07

    Abstract: A process is described for preparing 3-pentenenitrile, characterized by the following process steps: (a) isomerizing a reactant stream which comprises 2-methyl-3-butenenitrile over at least one dissolved or dispersed isomerization catalyst to give a stream 1 which comprises the at least one isomerization catalyst, 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile, (b) distilling stream 1 to obtain a stream 2 as the top product which comprises 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile, and a stream 3 as the bottom product which comprises the at least one isomerization catalyst, (c) distilling stream 2 to obtain a stream 4 as the top product which, compared to stream 2, is enriched in (Z)-2-methyl-2-butenenitrile, based on the sum of all pentenenitriles in stream 2, and a stream 5 as the bottom product which, compared to stream 2, is enriched in 3-pentenenitrile and 2-methyl-3-butenenitrile, based on the sum of all pentenenitriles in stream 2, (d) distilling stream 5 to obtain a stream 6 as the bottom product which comprises 3-pentenenitrile and a stream 7 as the top product which comprises 2-methyl-3-butenenitrile.

    17.
    发明专利
    未知

    公开(公告)号：BRPI0516617A

    公开(公告)日：2008-09-16

    申请号：BRPI0516617

    申请日：2005-10-12

    Applicant: BASF AG

    Inventor： DECKERT PETRA ,  BASSLER PETER ,  HADERLEIN GERD ,  LUYKEN HERMANN ,  SCHEIDEL JENS ,  PFAB PETER ,  AECHTNER TOBIAS ,  SIEGEL WOLFGANG

    IPC: B01J38/56 ,  B01D11/04 ,  B01J31/18 ,  B01J31/24 ,  B01J31/40 ,  C07C253/10

    Abstract: A process for extractively removing homogeneously dissolved catalysts from a reaction effluent of a hydrocyanation of unsaturated mononitriles to dinitriles with a hydrocarbon H, including performing the steps of a) concentrating the reaction effluent before step b) by distillation at pressures of from 0.1 to 5000 mbar and temperatures of from 10 to 150° C., b) adding a hydrocarbon H to the concentrated reaction effluent to obtain a stream I, and c) feeding stream I, without prior separation of the liquid phases, into an extraction apparatus and extracting it at a temperature T with the hydrocarbon H to obtain a stream II comprising the hydrocarbon H enriched with the catalyst and a stream III having a low catalyst content.

Patent Agency Ranking