中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

103 records (took 0.023 seconds)

    91.
    发明专利
    未知

    公开(公告)号：BR0110451A

    公开(公告)日：2003-03-11

    申请号：BR0110451

    申请日：2001-04-30

    Applicant: BASF AG

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

    IPC: C07D223/10 ,  C07B61/00 ,  C07D201/08 ,  C07D201/16

    Abstract: A process for the preparation of caprolactam is provided, whereina) a mixture (I) containing 6-aminocapronitrile and water is reacted in the liquid phase, in the presence of a catalyst, to give a mixture (II) containing caprolactam, ammonia, water, high-boiling components and low-boiling components,b) ammonia is then removed from the mixture (II) to give a mixture (III) containing caprolactam, water, high-boiling components and low-boiling components,c) water is then removed from the mixture (III) to give a mixture (IV) containing caprolactam, high-boiling components and low-boiling components, andd) a solid (V) containing caprolactam is then obtained from the mixture (IV) by crystallization, the proportion by weight of caprolactam in the solid (V) being greater than in the mixture (IV).

    92.
    发明专利
    未知

    公开(公告)号：ES2175793T3

    公开(公告)日：2002-11-16

    申请号：ES98948912

    申请日：1998-09-05

    Applicant: BASF AG

    Inventor： PUTTER 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.

    METHOD FOR PRODUCING CAPROLACTAM FROM 6-AMINOCAPRONITRILE
    93.
    发明专利
    METHOD FOR PRODUCING CAPROLACTAM FROM 6-AMINOCAPRONITRILE 未知

    公开(公告)号：CA2407723A1

    公开(公告)日：2002-10-29

    申请号：CA2407723

    申请日：2001-04-30

    Applicant: BASF AG

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

    IPC: C07D223/10 ,  C07B61/00 ,  C07D201/08 ,  C07D201/16

    Abstract: The invention relates to a method for producing caprolactam, characterized i n that a) a mixture (I) containing 6-aminocapronitrile and water in the liquid phase is converted into a mixture (II) containing caprolactam, ammonia, wate r, high boilers and low boilers in the presence of a catalyst; b) ammonia is th en removed from mixture (II), leaving a mixture (III) containing caprolactam, water, high boilers and low boilers; c) water is then removed from mixture (III) leaving a mixture (IV) containing caprolactam, high boilers and low boilers, and d) a solid (V) containing caprolactam is obtained from mixture (IV) by crystallization, the proportion by weight of caprolactam in the soli d (V) being greater than that in the mixture (IV).

    95.
    发明专利
    未知

    公开(公告)号：AT219962T

    公开(公告)日：2002-07-15

    申请号：AT97115933

    申请日：1997-09-12

    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

    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.

    Method for producing caprolactam from 6-aminocapronitrile
    98.
    发明专利
    Method for producing caprolactam from 6-aminocapronitrile 未知

    公开(公告)号：AU7238201A

    公开(公告)日：2001-11-12

    申请号：AU7238201

    申请日：2001-04-30

    Applicant: BASF AG

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

    IPC: C07D223/10 ,  C07B61/00 ,  C07D201/08 ,  C07D201/16

    Abstract: A process for the preparation of caprolactam is provided, whereina) a mixture (I) containing 6-aminocapronitrile and water is reacted in the liquid phase, in the presence of a catalyst, to give a mixture (II) containing caprolactam, ammonia, water, high-boiling components and low-boiling components,b) ammonia is then removed from the mixture (II) to give a mixture (III) containing caprolactam, water, high-boiling components and low-boiling components,c) water is then removed from the mixture (III) to give a mixture (IV) containing caprolactam, high-boiling components and low-boiling components, andd) a solid (V) containing caprolactam is then obtained from the mixture (IV) by crystallization, the proportion by weight of caprolactam in the solid (V) being greater than in the mixture (IV).

    METHOD FOR PURIFYING PHTHALIDES
    99.
    发明专利
    METHOD FOR PURIFYING PHTHALIDES 未知

    公开(公告)号：HU0003490A2

    公开(公告)日：2001-02-28

    申请号：HU0003490

    申请日：1998-09-18

    Applicant: BASF AG

    Inventor： BAUMANN DIETER ,  HANNEBAUM HEINZ ,  PUETTER HERMANN

    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.

Patent Agency Ranking