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    193.
    发明专利
    未知

    公开(公告)号：DE10225927A1

    公开(公告)日：2003-12-24

    申请号：DE10225927

    申请日：2002-06-11

    Applicant: BASF AG

    Inventor： HESSE MICHAEL ,  SCHLITTER STEPHAN ,  BORCHERT HOLGER ,  SCHUBERT MARKUS ,  ROESCH MARKUS ,  BOTTKE NILS ,  FISCHER ROLF-HARTMUTH ,  WECK ALEXANDER ,  WINDECKER GUNTHER ,  HEYDRICH GUNNAR

    IPC: B01J23/80 ,  C07B61/00 ,  C07C29/149 ,  C07C31/20 ,  C07C29/132 ,  C07D307/20 ,  C07D307/32

    Abstract: The present invention relates to a process for preparing optionally alkyl-substituted 1,4-butanediol by two-stage catalytic hydrogenation in the gas phase of C 4 -dicarboxylic acids and/or of derivatives thereof having the following steps: a) introducing a gas stream of a C 4 -dicarboxylic acid or of a derivative thereof at from 200 to 300° C. and from 2 to 60 bar into a first reactor and catalytically hydrogenating it to a product which contains mainly optionally alkyl-substituted gamma-butyrolactone; b) converting the product stream into the liquid phase; c) introducing the product stream obtained in this way into a second reactor at a temperature of from 100° C. to 240° C. and a pressure of from 20 to 250 bar and catalytically hydrogenating it in the liquid phase to optionally alkyl-substituted 1,4-butanediol; d) removing the desired product from by-products and any unconverted reactants; e) optionally recycling unconverted intermediates into one or both hydrogenation stages, said hydrogenation stages both using a catalyst which comprises =5% by weight, preferably from 5 to 95% by weight, in particular from 20 to 90% by weight, of a support, said second reactor having a higher pressure than said first reactor, and the product mixture removed from said first reactor being introduced without further purification into said second reactor.

    Process for preparing amines and aminonitriles
    194.
    发明专利
    Process for preparing amines and aminonitriles 未知

    公开(公告)号：CZ292717B6

    公开(公告)日：2003-12-17

    申请号：CZ324898

    申请日：1997-04-03

    Applicant: BASF AG

    Inventor： SCHNURR WERNER ,  VOIT GUIDO ,  FLICK KLEMENS ,  FISCHER ROLF-HARTMUTH

    IPC: B01J23/78 ,  B01J23/94 ,  B01J27/187 ,  B01J27/28 ,  B01J38/10 ,  C07B61/00 ,  C07C209/48 ,  C07C211/12 ,  C07C253/30 ,  C07C255/24

    Abstract: The present invention relates to a process for preparing compounds containing NHi2 groups by hydrogenating compounds having at least one unsaturated carbon-nitrogen bond with hydrogen in the presence of a catalyst at temperatures being higher thane room temperature and an elevated hydrogen partial pressure in the presence or absence of a solvent, which preparation process comprises (a) using a catalyst comprising a cobalt- and/or iron catalyst, (b) interrupting the hydrogenation when the hydrogenated compound transformation degree and/or selectivity of the required product drops below a defined limit or when the amount of undesired byproducts increases above a defined limit by stopping the feed of the compound to be hydrogenated, (c) treating the catalyst at a temperature ranging from 150 to 400 degC with hydrogen using a hydrogen pressure within the range from 0.1 to 30 MPa and a treatment time within the range from 2 to 48 hours, and (d) subsequently continuing the hydrogenation of the compound having at least one unsaturated carbon-nitrogen bond as well as the regeneration of cobalt- and/or iron-containing catalysts.

    199.
    发明专利
    未知

    公开(公告)号：BR0110452A

    公开(公告)日：2003-03-11

    申请号：BR0110452

    申请日：2001-04-30

    Applicant: BASF AG

    Inventor： OHLBACH FRANK ,  WINTERLING HELMUT ,  ANSMANN ANDREAS ,  FISCHER ROLF-HARTMUTH ,  MELDER JOHANN-PETER ,  MAIXNER STEFAN ,  BASSLER PETER ,  LUYKEN HERMANN

    IPC: C08J5/18 ,  C08G69/04 ,  C08G69/14 ,  C08G69/16

    Abstract: A process for preparing a polymer, which comprisesa) reacting a mixture (I) containing 6-aminocapronitrile and water in the presence of a catalyst to obtain a mixture (II) containing caprolactam, ammonia, water, high boilers and low boilers, thenb) removing ammonia from mixture (II) to obtain a mixture (III) containing caprolactam, water, high boilers and low boilers, thenc) removing all or some of the water from mixture (III) to obtain a mixture (IV) containing caprolactam, high boilers and low boilers and thend) feeding mixture (IV) to a polymerization reaction, and also the polymer obtainable by this process, the use of the polymer for producing fibers, sheetlike structures and moldings, and also fibers, sheetlike structures and moldings obtainable using such a polymer.

    200.
    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).

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