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公开(公告)号：AT365066T
公开(公告)日：2007-07-15
申请号：AT02787603
申请日：2002-11-08
Applicant: BASF AG
Inventor： HEILEK JOERG , BAUMANN DIETER , ECK BERND , HAMMON ULRICH , MUELLER-ENGEL KLAUS
Abstract: An apparatus for separating crystals from their suspension in contaminated crystal melt with purification, in which a hydraulic wash column has distributor aids in a distributor space.
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公开(公告)号：CA2303876C
公开(公告)日：2006-07-11
申请号：CA2303876
申请日：1998-09-18
Applicant: BASF AG
Inventor： HANNEBAUM HEINZ , PUTTER HERMANN , BAUMANN DIETER
IPC: C07D307/88 , C25B3/25
Abstract: Pure phthalides are produced from the reaction mixtures obtained in the phthalide production process by a) distilling off compounds with a boiling point below the boiling point of the phthalide from the reaction mixture, if such compounds are present, to obtain a residue of crude phthalide, and b) crystallising phthalide from a melt of the crude phthalide.
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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
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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公开(公告)号：DE59803768D1
公开(公告)日：2002-05-16
申请号：DE59803768
申请日：1998-09-05
Applicant: BASF AG
Inventor： PUETTER HERMANN , BAUMANN DIETER , HANNEBAUM HEINZ
IPC: C25B3/25 , C07D307/88 , C25B3/04
Abstract: A process for preparing phthalides byI. reducing phthalic acid or phthalic acid derivatives, where the carboxyl groups may be replaced by units which can be derived from the carboxyl groups by a condensation reaction and where one or more of the hydrogens of the o-phenylene unit may be substituted by inert radicals, at a cathode in a undivided electrolytic cell and dissolved in an electrolyte,II. discharging the electrolyte from the electrolytic cell when the reaction has proceeded to the stage where the molar ratio (M), formed by the proportion of phthalide and the sum of the proportions of phthalide and phthalic acid of phthalic acid derivatives in the electrolyte, is from 0.8:1 to 0.995:1, andIII. crystallizing the phthalides from the electrolyte and removing them from the mother liquor, if appropriate after distillative work-up of the electrolyte is described.
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公开(公告)号：DE10039025A1
公开(公告)日：2002-02-21
申请号：DE10039025
申请日：2000-08-10
Applicant: BASF AG
Inventor： ECK BERND , BAUMANN DIETER , HEILEK JOERG
Abstract: Purifying crude acrylic acid melt by converting to a crude acrylic acid suspension by cooling, and separating from remaining residual melt in wash column. In purifying a crude melt of acrylic acid (I) containing (excluding water) >= 80 wt.% (I), >= 100 ppm weight acetic acid and >= 10 ppm weight propionic acid, a suspension of purer (I) crystals (IA) and less pure residual melt (II) is produced by cooling the crude melt in the presence of 0.20- 10 wt.% water with respect to (I); and, after optional mechanical separation of part of (II), (IA) are freed from (II) in a column operating with forced transport of (IA) by washing with a melt of purified (IA).
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Patent Agency Ranking
公开(公告)号：DE10036880A1
公开(公告)日：2002-02-07
申请号：DE10036880
申请日：2000-07-28
Applicant: BASF AG
Inventor： HEILEK JOERG , ECK BERND , BAUMANN DIETER
Abstract: The invention relates to the use of an optical line detector for regulating the position of the wash front and/or the structural front pertaining to the crystal bed of a wash column during a melt cristallisation process, as well as a corresponding method for regulation. The line detector, for example a CCD camera or a linear array of luminance probes, is arranged in such a way that optical properties of the crystal bed can be continuously detected in a region running parallel to the longitudinal axis of the wash column. Said region covers the desired nominal position of the wash front or the structural front.
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公开(公告)号：AU6030501A
公开(公告)日：2001-12-11
申请号：AU6030501
申请日：2001-05-16
Applicant: BASF AG
Inventor： ECK BERND , BAUMANN DIETER , HEILEK JORG , MULLER-ENGEL KLAUS JOACHIM
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公开(公告)号：DE10026407A1
公开(公告)日：2001-12-06
申请号：DE10026407
申请日：2000-05-29
Applicant: BASF AG
Inventor： ECK BERND , BAUMANN DIETER , HEILEK JOERG , MUELLER-ENGEL KLAUS JOACHIM
Abstract: The invention relates to a method for discontinuous purification of crude acrylic acid by means of crystallization, comprising at least one purification step and at least one stripping step. The first stripping step is carried out in a different crystallizer from the first purification step.
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公开(公告)号：ES2160992T3
公开(公告)日：2001-11-16
申请号：ES98104396
申请日：1998-03-11
Applicant: BASF AG
Inventor： SCHLAFER DIETER DR , MAUSS MICHAEL DR , RAULS MATTHIAS DR , BAUMANN DIETER
IPC: C01D1/30
Abstract: Production of crystalline NaOH . 3.5H2O, involves crystallising NaOH.3.5H2O from an aqueous NaOH solution oversaturated with NaOH . 3.5H2O, and removing the crystals using a mechanical solid/liquid separator. The solid/liquid separation occurs under conditions in which crystalline NaOH.3.5H2O can be liberated from the lye residues; the NaCl content of the crystalline NaOH . 3.5H2O being ≤ 100 mg per kg.
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公开(公告)号：AT208229T
公开(公告)日：2001-11-15
申请号：AT98110345
申请日：1998-06-05
Applicant: BASF AG
Inventor： MELDER JOHANN-PETER DR , BAUMANN DIETER , MALTRY BERNHARD
IPC: C07C69/675 , B01D9/00 , B01J2/26 , C07C67/52
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