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    3.
    发明专利
    未知

    公开(公告)号：DE3873609D1

    公开(公告)日：1992-09-17

    申请号：DE3873609

    申请日：1988-05-11

    Applicant: BASF AG

    Inventor： GOESELE WILHELM DR ,  NONN GUENTHER DR ,  SCHREINER SIEGFRIED DR ,  SEID BERNHARD ,  THIELE HEINO DR

    IPC: B01F7/08 ,  C01B17/66 ,  D06P1/22 ,  D06P1/30 ,  D06P1/673 ,  D21C9/10

    Abstract: A pumpable and non-sedimenting high-conc. paste is made by mixing powdered sodium dithionite (hyposulphite) with organic liq. which is inert relative to that material in an intensive mixer whose mixing and dispersal operation is divided into separate stages. Suitable appts. has a rapidly rotating single-shaft extruder with three separate linear feed worm section sepd. by mixing and dispersal elements whose gap from the surrounding cylindrical stator is less than for the worm sections. Pre-mixing takes place with organic liq. from an initial feeder while further liq. or liq. mixts. are injected before the mixing elements. The entire extruder has a tempering jacket, and discharges into a cooler taking the paste to about 30 deg.C before storage.

    6.
    发明专利
    未知

    公开(公告)号：DE3682235D1

    公开(公告)日：1991-12-05

    申请号：DE3682235

    申请日：1986-06-19

    Applicant: BASF AG

    Inventor： HUPFER LEOPOLD DR ,  PAETSCH JUERGEN DR ,  HOTZ JOHANN ,  THIELE HEINO DR ,  ZETTLER HANS DIETER

    IPC: B01J2/00 ,  B01J2/20 ,  C07C29/94

    Abstract: In the working up of organic materials which are normally crystalline, where the materials, as powder or liq. melt, are processed in a 2-shaft screw machine with the worm shafts rotating in the same direction, are expelled through a narrowed passage into a zone at low pressure, and are cooled and comminuted, the materials are heated to form a melt film during transit through the narrowed passage.

    7.
    发明专利
    未知

    公开(公告)号：DE3905007A1

    公开(公告)日：1990-08-23

    申请号：DE3905007

    申请日：1989-02-18

    Applicant: BASF AG

    Inventor： GOFFING FRIEDRICH DR ,  KROKER JOERG DR ,  NACHTRAB RAINER ,  THIELE HEINO DR

    IPC: C08J3/02 ,  B29B7/38 ,  C08J3/03

    Abstract: A continuous process for the preparation of aqueous, non-self-emulsifying polymer dispersions having small particles and a long shelf life on the basis of high-viscosity reaction resins without addition of solvents by means of a screw compounder which produces vigorous dispersion, the polymer dispersions being prepared in an intensive-shear part of the screw compounder, and the water/reaction resin ratio in this intensive-shear part being at or close to the phase-inversion point, and - the specific input of energy being 0.01 - 0.15 kWh/kg, - the residence time being 0.1 - 60 sec and - the shear gradient being 2000 - 20 000 sec .

    9.
    发明专利
    未知

    公开(公告)号：DE3626907A1

    公开(公告)日：1988-02-11

    申请号：DE3626907

    申请日：1986-08-08

    Applicant: BASF AG

    Inventor： ZETTLER HANS DIETER ,  THIELE HEINO DR ,  NACHTRAB RAINER ,  SAPPOK REINHARD DR

    IPC: C09B67/20 ,  B01F23/47 ,  C09B67/00 ,  C09C3/00 ,  B01F3/08 ,  B01F7/00

    Abstract: 1. A continuous process for the preparation of a poorly flowing flushed color from an aqueous pigment suspension (press cake) and a water-immiscible organic liquid which may or may not contain a binder, with the aid of an intensive mixer, wherein the aqueous pigment suspension (press cake) and the water-immiscible organic liquid (binder) or the mixture of the aqueous pigment suspension (press cake) and water-immiscible organic liquid (binder) are or is continuously fed to an intensive mixing and shearing zone, from 3 to 10% by volume of the mixture present in the said zone being subjected to a shear gradient of from 500 to 7500 S**-1 at any time and the residence time under the action of this shear gradient being from 0.5 to 60 seconds, and the remaining 97-90% by volume of the mixture are subjected to shear gradients which are lower by a factor of 10 or more, and the water phase is separated off from the water/flushed color mixture leaving the intensive mixing and shearing zone.

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