中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

103 records (took 0.022 seconds)

    72.
    发明专利
    未知

    公开(公告)号：DE10021192A1

    公开(公告)日：2001-11-08

    申请号：DE10021192

    申请日：2000-05-03

    Applicant: BASF AG

    Inventor： BASLER PETER ,  BAUMANN DIETER ,  FISCHER ROLF ,  FUCHS EBERHARD ,  MELDER JOHANN-PETER ,  OHLBACH FRANK

    IPC: C07D223/12 ,  C07D201/08 ,  C07D223/10

    Abstract: The invention relates to a method for producing caprolactam, which is characterized by a) reacting, in the presence of a catalyst, a mixture (I) that contains 6-aminocapronitrile and water in the gaseous phase to give a mixture (II) that contains caprolactam, ammonia, water, high-boiling and low-boiling substances, subsequently b) removing the ammonia from mixture (II), thereby producing a mixture (III) that contains caprolactam, water, high-boiling and low-boiling substances, c) removing the water from mixture (III), thereby producing a mixture (IV) that contains caprolactam, high-boiling and low-boiling substances, and finally d) obtaining by crystallization a caprolactam-containing solid substance (V) from mixture (IV), the weight percentage of caprolactam in the solid substance (V) being higher than in mixture (IV).

    73.
    发明专利
    未知

    公开(公告)号：DE59801060D1

    公开(公告)日：2001-08-30

    申请号：DE59801060

    申请日：1998-03-11

    Applicant: BASF AG

    Inventor： SCHLAEFER DR ,  MAUSS DR ,  RAULS 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.

    74.
    发明专利
    未知

    公开(公告)号：DE19926082A1

    公开(公告)日：2000-12-14

    申请号：DE19926082

    申请日：1999-06-08

    Applicant: BASF AG

    Inventor： ECK BERND ,  HEILEK JOERG ,  BAUMANN DIETER ,  SCHLIEPHAKE VOLKER

    IPC: C07C51/64 ,  C07C51/25 ,  C07C51/43 ,  C07C51/47 ,  C07C57/05 ,  C07C57/07

    Abstract: The invention relates to a method of purifying and producing acrylic acid or methacrylic acid by crystallization. As a result of the crystallization, a crystallized product and a mother liquor is obtained and the crystallized product is washed at a temperature of 15 to 40 DEG C with a wash solution that contains the acid. The invention further relates to a method of producing acrylic acid or methacrylic acid that comprises the above-mentioned purification method.

    75.
    发明专利
    未知

    公开(公告)号：BR9812248A

    公开(公告)日：2000-07-18

    申请号：BR9812248

    申请日：1998-09-18

    Applicant: BASF AG

    Inventor： PUETTER HERMANN DR ,  HANNEBAUM HEINZ ,  BAUMANN DIETER

    IPC: C07D307/88 ,  C25B3/25

    Abstract: Phthalides in as-obtained phthalide synthesis reaction mixtures are recovered in pure form by(a) distilling compounds having a boiling point below the boiling point of the phthalide from the reaction mixture, provided such compounds are present in the reaction mixture, to obtain a crude phthalide as bottom product,(b) crystallizing the phthalide from a melt of the crude phthalide.

    76.
    发明专利
    未知

    公开(公告)号：DE19637380C1

    公开(公告)日：1998-04-09

    申请号：DE19637380

    申请日：1996-09-13

    Applicant: BASF AG

    Inventor： WEYER HANS-JUERGEN DR ,  ECK BERND ,  BAUMANN DIETER ,  MALTRY BERNHARD

    IPC: B01J2/00 ,  B01J2/02 ,  B01J2/26 ,  C07C67/52 ,  C07C69/675 ,  B01J2/06

    Abstract: The production of neopentyl glycolhydroxypivalate (NPG-HP) granules (I) comprises pouring molten NPG-HP onto a cooling surface so that the melt solidifies, using a melt containing 3 wt.% NPG-HP crystals. Also claimed are: (i) NPG-HP granules (I) obtained by the above process, especially: (a) spherical granules with an average diameter of 3-16 mm; or (b) granules with an average diameter of 20-100 mm and at least two parallel faces 15-30 mm apart; and (ii) the use of a granulating system for the above process, with a precooler (2) for the NPG-HP melt, a precrystalliser (3), and a drop-forming system (4) or a flat spreader to bring the melt onto a cooling belt (6), with a crusher if a flat spreader is used.

    Zpusob cistení taveniny surové kyseliny akrylové
    78.
    发明专利
    Zpusob cistení taveniny surové kyseliny akrylové 未知

    公开(公告)号：CZ303896B6

    公开(公告)日：2013-06-12

    申请号：CZ20023376

    申请日：2001-04-04

    Applicant: BASF AG

    Inventor： ECK BERND ,  BAUMANN DIETER ,  HEILEK JOERG ,  MUELLER-ENGEL KLAUS JOACHIM

    IPC: C07C51/43 ,  C07C51/47 ,  C07C57/04 ,  C07C57/07

    Abstract: Zpusob cistení taveniny surové kyseliny akrylové, pri kterém se tato surová kyselina mení za pusobení nízkých teplot na suspenzi surové kyseliny akrylové, sestávající se z krystalu kyseliny akrylové a zbytkové taveniny, pricemz krystaly kyseliny akrylové v této suspenzi se zbavují ulpívající zbytkové taveniny na promývací kolone. Krystaly cistsí kyseliny akrylové v suspenzi surové kyseliny akrylové se vytvárejí za prítomnosti vody. Promývací kolona vyuzívá nucený transport krystalu kyseliny akrylové a jako promývací kapalina se pouzívá tavenina krystalu kyseliny akrylové, vycistených na promývací kolone.

    طريقة لتنقية مادة ذائبة من حمض acrylic خام
    79.
    发明专利
    طريقة لتنقية مادة ذائبة من حمض acrylic خام 未知

    公开(公告)号：SA1862B1

    公开(公告)日：2007-07-31

    申请号：SA01220077

    申请日：2001-04-24

    Applicant: BASF AG

    Inventor： ECK BERND ,  BAUMANN DIETER ,  HEILEK JORG ,  -ENGEL KLAUS JOACHIM MULLER

    IPC: C07C51/42

    Abstract: الملخص: يتعلقالاختراعالحاليبعملية process لتنقية purification مادةذائبة melt منحمض acrylic خام،فيهاتحولالمادةالذائبةلحمض acrylic الخام،تحتتأثيردرجاتحرارةمنخفضة،إلىمعلقحمض acrylic خاميتكونمنبلوراتحمض acrylic ومادةذائبةمتخلفة،وتصبحبلوراتحمض acrylic فيمعلق- acrylic الخامخاليةمنمادةذائبةمتخلفةمتبقيةفيعمودغسيل،يتمإنتاجبلوراتحمض acrylic منمعلقحمض acrylic الخامفيوجودالماء،ويكونعمودالغسيلهوعمودغسيلبهانتقالمدفوعلبلورات- acrylic ويكونسائلالغسيلالمستخدمهوالمادةالذائبةمنبلوراتحمض acrylic المنقاةفيعمودالغسيل.

Patent Agency Ranking