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    41.
    发明专利
    未知

    公开(公告)号：DE10026233A1

    公开(公告)日：2001-11-29

    申请号：DE10026233

    申请日：2000-05-26

    Applicant: BASF AG

    Inventor： ECK BERND ,  HEILEK JOERG ,  SCHMIDT-RADDE MARTIN ,  HELFERT HERBERT

    IPC: C07D201/16 ,  C07D207/26 ,  C07D207/267

    Abstract: The invention relates to a method for obtaining pure N-vinyl pyrrolidone from raw materials containing N-vinyl pyrrolidone, said method comprising a single or multiple-stage crystallisation method. The method is characterised in that the mother liquor of the first crystallisation stage is either purified by distillation and/or extraction or is returned to a product stream of the production process, said stream containing an N-vinyl pyrrolidone.

    PRODUCTION OF SODIUM DIFORMATE
    43.
    发明专利
    PRODUCTION OF SODIUM DIFORMATE 未知

    公开(公告)号：MY142796A

    公开(公告)日：2010-12-31

    申请号：MYPI20061919

    申请日：2006-04-26

    Applicant: BASF AG

    Inventor： HAUK ALEXANDER DR ,  GROPP STEFAN ,  LENZ ROBERT ,  RIECK DANIELA ,  HEILEK JOERG ,  LAUX GERHARD

    IPC: C07C53/00

    Abstract: 34 ABSTRACR PRORYJCRIONI OF SODIUM DIFOFMTE THE PRESENT INVENTION RELATES TO A PROCESS FOR PRODUCING A SOLID SODIUM DIFORMALE PREPARATION HAVING A FORMIC ACID CONTENT OF M LEAST 35BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE SODIUM DIFORMATE PREPARATION, IN WHICH, AT ELEVATED TEMPERATURE FROM SODIUM FORMATE AND AT LEAST 74TRENGTH BY WEIGHT FORMIC ACID, AN AQUEOUS SOLUTION IS 5 PRODUCED WHICH HAS A MOLAR RATIO OF HCOOH:HCOONA OF GREATER THAN 1.5:1 AND A MOLAR RATIO OF HCOOH:H20 OF AT LEAST 1.11. THE AQUEOUS SOLUTION IS BROUGHT TO CRYSTALLIZATION, AND THE SOLID PHASE IS SEPARATED OFF FROM THE MOTHER LIQUOR, (I) A SIALOQUANTITY (A) OF THE MOTHER LIQUOR BEING USED IN THE PRODUCTION OF THE AQUEOUS 10 SOLUTION AND (II) A SLJBQUANTITY (B) OF THE MOTHER LIQUOR BEING ADMIXED WITH A SODIUM-CONTAINING BASE AND THE RESULTANT MIXTURE COMPRISING SODIUM FORMATE, IF APPROPRIATE AFTER EJECTING A PART OF SAME, AND IF APPROPRIATE AFTER CONCENTRATING SAME, LIKEWISE BEING 15 USED IN THE PRODUCTION OF THE AQUEOUS SOLUTION; AND THE SUBQUANTITIES (A) AND (B) OF THE MOTHER LIQUOR TOTALING 1 00BY WEIGHT. @ 00@ IQ

    44.
    发明专利
    未知

    公开(公告)号：BRPI0607497A2

    公开(公告)日：2010-04-06

    申请号：BRPI0607497

    申请日：2006-03-01

    Applicant: BASF AG

    Inventor： HEILEK JOERG ,  MUELLER-ENGEL KLAUS JOACHIM ,  ADAMI CHRISTOPH ,  DIETERLE MARTIN

    IPC: C07C51/573 ,  C07C57/04

    Abstract: The invention relates to a method for separating methacrolein from acrylic acid as the main constituent and from a liquid phase P containing methacrolein as a minor constituent, in addition to a target product. According to said method, the separation takes place by crystallisation, whereby the acrylic acid is concentrated in the formed crystallisate and the methacrolein is concentrated in the remaining mother liquor.

    Heterogeneously catalyzed partial gas phase oxidation of propylene to acrylic acid comprises introducing a reaction gas mixture into a reaction zone, and transferring the product gas mixture into a condensed phase and a separation zone
    48.
    发明专利
    Heterogeneously catalyzed partial gas phase oxidation of propylene to acrylic acid comprises introducing a reaction gas mixture into a reaction zone, and transferring the product gas mixture into a condensed phase and a separation zone 未知

    公开(公告)号：DE102005062010A1

    公开(公告)日：2007-06-28

    申请号：DE102005062010

    申请日：2005-12-22

    Applicant: BASF AG

    Inventor： DIETERLE MARTIN ,  HEILEK JOERG ,  MUELLER-ENGEL KLAUS JOACHIM

    IPC: C07C57/05 ,  B01J23/84 ,  C07C45/50 ,  C07C47/22 ,  C07C57/07 ,  C08F20/06

    Abstract: Heterogeneously catalyzed partial gas phase oxidation of propylene to acrylic acid comprises introducing a reaction gas initial mixture (1) into a first reaction zone; reducing the temperature of the product gas mixture (1) by direct and/or indirect cooling, and adding a secondary gas to the product gas mixture (1); and subsequently introducing the product gas mixture (1), into a second reaction stage; and subsequently transferring the product gas mixture (2) containing acrylic acid in a first separation zone into the condensed phase and subsequently in a second separation zone. Heterogeneously catalyzed partial gas phase oxidation of propylene to acrylic acid comprises introducing a reaction gas initial mixture (1) containing propylene and molecular oxygen in a molar ratio of >=, 1 and at least an inert dilution gas in a first reaction stage, into a first reaction zone through at least a first catalyst bed at increased temperature, where the catalyst exhibit at least a multi-metal oxide (A) containing molybdenum, iron and bismuth as active mass, such that the propylene conversion during a single passage through the catalyst bed is >= 90 mol.% and the resulting selectivity of the acrolein- and acrylic acid by-product- formation is >= 80 mol.%; reducing the temperature of the product gas mixture (1) from the first reaction stage by direct and/or indirect cooling, and adding a secondary gas in the form of molecular oxygen and/or inert gas to the product gas mixture (1); and subsequently introducing the product gas mixture (1) as a reaction gas initial mixture (2) containing molecular oxygen and acrolein in a molar ratio of >= 0.5 and at least an inert dilution gas, in a second reaction stage at increased temperature by at least a second catalyst bed, whose catalysts exhibits multi-metal oxide (A1) containing at least an molybdenum and vanadium as active mass in such a way that the acrolein conversion during a single passage through the catalyst bed is >= 90 mol % and the selectivity of the acrylic acid formation over both the reaction stages is >= 70 mol %, with respect to converted propylene; subsequently transferring the product gas mixture (2) containing acrylic acid in a first separation zone into the condensed phase and subsequently in a second separation zone, where: the acrylic acid is separated from the condensed phase by application of at least a thermal separation process comprising at least a crystallization separation of the acrylic acid, and the reaction gas initial mixture (1) contains cyclopropane (up to 3 mol.%), with respect to the propylene.

    49.
    发明专利
    未知

    公开(公告)号：DE50102615D1

    公开(公告)日：2004-07-22

    申请号：DE50102615

    申请日：2001-07-27

    Applicant: BASF AG

    Inventor： HEILEK JOERG ,  ECK BERND ,  BAUMANN DIETER

    IPC: B01D9/00 ,  C07C51/43 ,  C07C51/47 ,  G01N21/51

    Abstract: The present invention relates to the use of an optical line detector for regulating the position of the wash front and/or of the build-up front of the crystal bed of a wash column in a melt crystallization process and a corresponding regulation method. The line detector, for example a CCD camera or a linear array of reflection probes, is arranged in such a way that optical properties of the crystal bed can be detected continuously in a region running parallel to the longitudinal axis of the wash column, this region covering the desired setpoint position of the wash front or of the build-up front.

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