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    2.
    发明专利
    未知

    公开(公告)号：DE2845019A1

    公开(公告)日：1980-04-30

    申请号：DE2845019

    申请日：1978-10-16

    Applicant: BASF AG

    Inventor： HORN PETER DIPL CHEM DR ,  GROSSKINSKY OTTO-ALFRED DIPL C ,  THOMA RICHARD DIPL ING DR ,  FUCHS HUGO DIPL CHEM DR

    IPC: C07D201/04 ,  C07D223/10

    Abstract: A process for the continuous preparation of epsilon -caprolactam by Beckmann rearrangement of cyclohexanone-oxime, dissolved in a solvent which is inert toward oleum and is immiscible with oleum and water, at an elevated temperature, with removal of the heat of rearrangement by evaporation of the solvent, wherein oleum containing caprolactam is circulated successively through a conveying zone, a mixing zone, a boiling zone and a separating zone, upstream of the conveying zone oleum is added at the rate at which it is consumed, in the mixing zone cyclohexanone-oxime dissolved in solvent is added under turbulent conditions, in the boiling zone the heat of rearrangement is removed in a conventional manner by evaporating the solvent and recycling the condensate, and in the separating zone the reaction mixture is separated into a solvent phase, from which solvent is withdrawn at the rate at which the phase is formed, and a caprolactam-containing oleum phase, which is removed at the rate at which it is formed.

    5.
    发明专利
    未知

    公开(公告)号：DE2315114A1

    公开(公告)日：1974-10-10

    申请号：DE2315114

    申请日：1973-03-27

    Applicant: BASF AG

    Inventor： THOMA RICHARD DIPL ING DR ,  REBHAN JOERG DIPL ING ,  BOLTE HERBERT DIPL CHEM DR ,  HEIL EDUARD DIPL ING ,  FISCHER HERMANN DIPL CHEM DR ,  MATTHIAS KLAUS DIPL ING DR

    IPC: B01F23/47 ,  C08J3/22 ,  B01F3/10

    Abstract: 1455663 Mixing liquids BASF AG 26 March 1974 [27 March 1973] 13255/74 Heading B1C In a process for mixing two liquids having a viscosity difference of at least two powers of 10 in terms of poise, a portion of the high viscosity liquid is. mixed with low-viscosity liquid in a dynamic mixer to form a premix having a viscosity less than two powers of 10 bellow that of the higher viscosity liquid, and the premix mixed with the remainder of the high viscosity material in a static mixer. Preferably the mixing of the premix in the dynamic mixer is carried out at a sheer rate of at least 0.1 sec -1 to form a premix containing not more than 60% by weight of the low viscosity material, and the mixing in the static mixer is carried out at a sheer rate of not more than 10 4 sec -1 . In an apparatus the high viscosity liquid 1 is branched off through a line 4 and metering pump 5 to a junction 6 where it is joined by low viscosity liquid metered by a pump 8. The premix so formed is mixed in a toothed disc mixer 12 and fed to the main high viscosity stream at 17, the total stream being subdivided into partial streams which are displaced and recombined in a static homogenizer 20. In modifications a second high viscosity material 3 .may be added to the branch line 4 of the first, and a third high viscosity liquid material 14 with or without solids content to the junction 6 or to the premix at 18; further low viscosity material may be added to the main stream of the mixture at 19 or through a line 10 to the static homogenizer 20. The invention may be used for mixing lubricants, expanding agents, stabilizers and plasticizers with molten polymers; examples relate to nylon 6 and the mixing of a paraffin oil with polystyrene.

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