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    1.
    发明专利
    未知

    公开(公告)号：DE2248562A1

    公开(公告)日：1974-04-11

    申请号：DE2248562

    申请日：1972-10-04

    Applicant: BASF AG

    Inventor： WENISCH FRANZ DR ,  NOHE HEINZ DR ,  SUTER HUBERT DR

    IPC: C25B3/29 ,  C07C69/34 ,  C07C69/50

    Abstract: The production of diesters of dicarboxylic acids having six to 18 carbon atoms and alcohols of four to 12 carbon atoms by electrochemical condensation of monoesters of dicarboxylic acids of four to 10 carbon atoms and alcohols of four to 12 carbon atoms in solution in methanol which contains from 0.01 to 5% by weight of water.

    2.
    发明专利
    未知

    公开(公告)号：DE2039590A1

    公开(公告)日：1972-02-10

    申请号：DE2039590

    申请日：1970-08-08

    Applicant: BASF AG

    Inventor： EISELE WOLFGANG DR ,  NOHE HEINZ DR ,  VON DIPL-ING AMMON HANS ,  BECK FRITZ DR ,  SUTER HUBERT DR

    IPC: C25B3/29 ,  B01K3/04

    Abstract: Bipolar electrodes having two chambers for inflow and outflow of the reaction mixture to be electrolyzed. The chambers are separated from each other by a distance which is considerably larger than their width and the inlets and outlets are on the same side of the electrode. Electrodes of this kind are suitable, for example, for the Kolbe synthesis of dicarboxylic esters from dicarboxylic half-esters. Such esters are useful as plasticizers.

    4.
    发明专利
    未知

    公开(公告)号：DE2039991A1

    公开(公告)日：1972-02-17

    申请号：DE2039991

    申请日：1970-08-12

    Applicant: BASF AG

    Inventor： EISELE WOLFGANG DR ,  NOHE HEINZ DR ,  SUTER HUBERT DR

    IPC: C25B3/29 ,  C07C69/50

    Abstract: 1352763 Sebacic acid diesters BADISCHE ANILIN- & SODA-FABRIK AG 11 Aug 1971 [12 Aug 1970] 37676/71 Heading C2C [Also in Division C7] Sebacic acid diesters of C 4-12 alcohols, e.g. di-2-ethylhexyl sebacate, are made by electrochemical condensation of the corresponding adipic acid monoesters, e.g. mono-2-ethylhexyl adipate, in methanolic solution, the current flow through the electrolytic cell being intermittently stopped, e.g. for periods of 2 to 60 seconds at intervals of 1 to 30 minutes, and the electrodes being short-circuited. The solution may also contain 5 to 20% of methylethyl ketone or cyclohexanone, and 0À5 to 2% of acetic acid; the acidic solution may be partially neutralized by adding sodium (bi)-carbonate or methoxide. The C.D. may be 5 to 50 A/dm. 2 The anode may be of Pt, Pt-Rh, Pt-Ru, Pt-Ir, Au, Au-Pt, Au plated or platinized Ti or Ta or Ru oxide; the cathode may be of Pt, stainless steel, Ni or Ti. The cell may have permable vibrating pairs of electrodes, or impermeable non-vibrating electrodes.

    Catalyst for maleic anhydride prodn. - from 4c unsatd. linear hydrocarbons
    6.
    发明专利
    Catalyst for maleic anhydride prodn. - from 4c unsatd. linear hydrocarbons 未知

    公开(公告)号：DE1949491A1

    公开(公告)日：1971-04-08

    申请号：DE1949491

    申请日：1969-10-01

    Applicant: BASF AG

    Inventor： RENAUER ERICH DR ,  VON DIPL-ING AMMON HANS ,  SUTER HUBERT DR ,  POEHLER GUENTER DR-ING ,  ENGELBACH HEINZ DR ,  STOESSEL ARMIN DR

    IPC: C07C51/215 ,  C07C51/25 ,  C07C51/56 ,  C07C57/14

    Abstract: The process involves (1) Adding a mixture of C4 hydrocarbons (I) of which >=50% are linear and olefinically unsatd. to air, heated to 100-200 degrees C. (2) Adding a volatile organic or mineral phosphorus cpd (II). (3) Passing the mixture through a tubular reactor at 420-600 degrees C lined with catalyst contg. 45-95% TiO2, 0.2-20% V2O5 and 3-53% P2Ok. (4) HEat exchange being carried out by a circulated salt bath at 350-440 degrees C supplied at one end of the reactor at constant flow through an annular tube and discharging from the other end of the reactor through a second annular tube. (5) Cooling the reacted mixture to 160-180 degrees C and washing it to extract maleic anhydride using cold aqs. maleic acid soln. which is obtained at concn. 30-50%. (6) Evaporating the soln. to >90% conc. in thin film evaporators. (7) Splitting maleic anhydride and water vapour in another evaporator. (8) Refining the crude product by continuous fractionation. (I) may contain 0-30% butadiene, 20-100% n-butenes, 0-50% isobutene and 10-50% butanes where the total of butadiene and n-butenes is >=50%. (II) is a trialkyl 1-4C phosphate. Content of (I) is 25-40g/m3 normal of the heated air. The process uses cheaper raw materials, than known maleic anhydride production precesses, and is simpler to control, more trouble free, and gives improved yields of high quality product.

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