中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

71 records (took 0.022 seconds)

    54.
    发明专利
    未知

    公开(公告)号：AT228924T

    公开(公告)日：2002-12-15

    申请号：AT98947430

    申请日：1998-08-13

    Applicant: BASF AG

    Inventor： BERBNER HEINZ ,  ETLING HANS ,  GUENTHER ERHARD ,  SIRCH TILMAN ,  ZETTLER HANS DIETER

    IPC: B29C48/38 ,  B29C47/00 ,  B29C48/76 ,  B29C67/24 ,  C08G8/00 ,  C08G12/12 ,  C08G12/32 ,  C08G14/00 ,  B29C47/50 ,  B29C47/76

    Abstract: The invention relates to a continuous process for preparing aminoplastics and/or phenolics, in which a precondensate solution is prepared in a first extruder (14), the precondensate solution is continuously fed, with addition of additives, to a second extruder (20) with partial filling in the feed section (E) and devolatilization section (G), devolatilized in the second extruder (20) and then formed to give a molding composition or an end product. The process is particularly suitable for preparing melamine resins, in particular melamine-formaldehyde resins, as well as for preparing urea-formaldehyde resins.

    PREPARATION OF 1,6-HEXANEDIOL
    55.
    发明专利
    PREPARATION OF 1,6-HEXANEDIOL 未知

    公开(公告)号：MY137827A

    公开(公告)日：2009-03-31

    申请号：MYPI20054914

    申请日：2005-10-19

    Applicant: BASF AG

    Inventor： SIRCH TILMAN ,  TEBBEN GERD-DIETER DR ,  HECK LUDWIG E ,  DIEFENBACHER ARMIN DR ,  KRAUSE ALFRED DR ,  BORGEL FRANZ

    Abstract: 1 7 PREPARATION OF 1,6-HEXANEDIOL ABSTRACT 5 THE PRESENT INVENTION PROVIDES A PROCESS FOR PREPARING 1,6-HEXANEDIOL FROM A CARBOXYLIC ACID MIXTURE WHICH COMPRISES ADIPIC ACID, 6-HVBROXYCAPROIC ACID AND SMALL AMOUNTS OF 11,4-CYCLOHEXANCCLIOLS AND IS OBTAINED AS A BY-PRODUCT IN THE OXIDATION OF CYCLOHEXANE TO CVCLOHEXANONELCYCLOHEXANOL WITH OXYGEN OR OXVGCN-CONTAININO CASES AND BY %,ALEI EXTRACTION OL THE REACTION MIXTURE, BY ESIERILICATION OF ZHE ACIDS AND 10 HYDROGENATION, IN WHICH A) THE MONO- AND DICARBOXYLIC ACIDS PRESENT IN THE AQUEOUS DICARBOXYLIC ACID MIXTURE ARE REACTED WITH A LOW MOLECULAR WEIGHT ALCOHOL TO GIVE THE CORRESPONDING C@RBOXYLIC ESTERS, 1 5 B) THE RESULTING ESTERIFICATION MIXTURE IS FREED OF EXCESS ALCOHOL AND LOW BOILERS IN A FIRST DISTILLATION STAGE, C) A SEPARATION OF THE BOTTOM PRODUCT IS CARRIED OUT IN A SECOND DISTILLATION STAGE INTO 20 AN ESTER FRACTION SUBSTANTIALLY FREE OF 1,4-CYCLOHEXANECLIOLS AND A FRACTION COMPRISING AT LEAST THE MAJORITY OF THE 1,4-CYCLOHEXANEDIOLS, D) THE ESTER FRACTION SUBSTANTIALLY FREE OF 1,4-CYCLOHEXANEDIOLS IS CATAL ICALLY YT HYDROGENATED AND 25 E) 1,6-HEXANEDIAL IS OBTAINED IN A PURIFYING DISTILLATION STAGE FROM THE HYDROGENATION EFFLUENT WHILE REMOVING AN ALCOHOL-LOW BOILER MIXTURE IN A MANNER KNOWN PER SE, WHEREIN ALCOHOL IS REMOVED BY A MEMBRANE SYSTEM FROM THE MIXTURES, OBTAINED AFTER THE ESTERIFICATION IN STAGE B) AND/OR AFTER THE HYDROGENATION IN STAGE E), OF 30 ALCOHOLS AND LOW BOILERS AND RECYCLED INTO THE ESTERIFICATION. Z)OAM4 I Q /I O/O@-

    56.
    发明专利
    未知

    公开(公告)号：AT376987T

    公开(公告)日：2007-11-15

    申请号：AT05759413

    申请日：2005-07-07

    Applicant: BASF AG

    Inventor： HAUNERT ANDREA ,  PINKOS ROLF ,  KRUG THOMAS ,  SIRCH TILMAN ,  KOCH MICHAEL ,  TEBBEN GERD-DIETER

    IPC: C07C29/145 ,  C07C29/149 ,  C07C31/20

    Abstract: The present invention provides a process for preparing 1,6-hexanediol by hydrogenating dialkyl adipates, alkyl 6-hydroxycaproates, 1,4-cyclohexanedione and 4-hydroxycyclohexan-1-one as ester mixtures comprising impurities, by a) freeing resulting the esterification mixture of excess alcohol and low boilers in a first distillation stage (alcohol removal), b) carrying out a separation of the bottom product in a second distillation stage into an ester fraction substantially free of 1,4-cyclohexanediols and a fraction comprising at least the majority of the 1,4-cyclohexanediols, c) catalytically hydrogenating the ester fraction substantially free of 1,4-cyclohexanediols (ester hydrogenation) and d) in a purifying distillation stage, obtaining 1,6-hexanediol from the hydrogenation effluent in a manner known per se, which comprises selectively hydrogenating the ester mixture before stage a) and/or before stage b) (purifying hydrogenation).

    58.
    发明专利
    未知

    公开(公告)号：DE50208083D1

    公开(公告)日：2006-10-19

    申请号：DE50208083

    申请日：2002-10-18

    Applicant: BASF AG

    Inventor： KOCH MICHAEL ,  WARTINI ALEXANDER ,  SIRCH TILMAN ,  DERNBACH MATTHIAS

    IPC: C07C29/88 ,  C07C29/90 ,  C07C31/22

    Abstract: A method for removing trialkyl ammonium formate from a methylol alkanes obtained by condensation of formaldehyde with a higher aldehyde. The invention is characterized in that trialkyl ammonium formate is decomposed at a high temperature using catalysts containing at least one metal from groups 8-12 of the classification of elements in the presence of gas containing hydrogen. The method makes it possible to separate trialkyl ammonium formate according to the organic Cannizzaro method and according to the hydrogenation method.

Patent Agency Ranking