Abstract: Mixer comprising a housing having filling and emptying openings, two corotating stirrers and drivers for the stirrers, one of the stirrers being arranged centrally in the housing and having at least a drive shaft and at least one transverse beam fitted to the drive shaft and at least one stirring arm fitted at their ends to the transverse beam.

Abstract: A static mixer comprising a hollow housing defining an internal longitudinal passageway within which there is arranged an assembly of planer mixer elements having projecting longitudinal components.

Abstract: A mixer is which comprises a housing (1) with filling (4) and emptying (5) openings, two corotating stirrers (2) and (3) and driveers for moving the stirrers (2) and (3), wherein one stirrer (2) is arranged centrally in the housing (1), the stirrer (2) comprising at least a drive shaft (6), at least one transverse beam (7) fitted to the latter and at least one, preferably at least two, stirring arms (8, 9) fitted in each case at their ends to this transverse beam (7).

Abstract: A static mixer is disclosed comprising a mixer insert and an enclosing housing having a central axis. The insert includes at least three interleaved grids and each of the grids includes a plurality of layers that are superposed parallel one to the others. Each of the layers includes a plurality of bars that are mutually parallel one to the others. There is an angle of 30 to 60 degrees between each of the bars and the axis.

Abstract: A static mixer comprising a hollow housing defining an internal longitudinal passageway within which there is arranged an assembly of planer mixer elements having projecting longitudinal components.

Abstract: A heatable and coolable static mixer comprising at least two adjacently arranged layers of bars, wherein the bars of neighboring layers cross one another and are interconnected at the crossing points and wherein the layers of bars have heat transfer ducts passing through them at the crossing points.

Abstract: A dynamic mixer is described comprising at least one housing with two or more inlets for the mixing components and an outlet as well as a shaft with a screw thread and a drive means for the rotation of the shaft, as well as a process for the mixing of highly reactive educts. The mixer has a mixing zone in which oppositely directly threaded grooves are present on the shaft and on the internal wall of the housing, and at least one inlet is arranged in the mixing zone with oppositely directed threaded grooves.

Abstract: A static mixer is disclosed comprising a mixer insert and an enclosing housing having a central axis. The insert includes at least three interleaved grids and each of the grids includes a plurality of layers that are superposed parallel one to the others. Each of the layers includes a plurality of bars that are mutually parallel one to the others. There is an angle of 30 to 60 degrees between each of the bars and the axis.

Abstract: A description is given of a mixing apparatus for the treatment of viscous substances which comprises a heatable housing 1 with a product inlet 6 on one side of the vessel and a product outlet 8 on the other side of the housing 1 and, if appropriate, an exhaust vapor nozzle 7, which comprises two or more mutually parallel counter-rotating shafts 2, 2′. Located thereupon there are paddles 3, 3′ extending in the circumferential direction and blades 4, 4′, 5, 5′ extending along the axial direction. The apparatus permits the active axial conveyance of the mixed substance, the moving internals fully cleaning themselves kinematically during operation of the apparatus.

Abstract: A static mixer apparatus for mixing viscous fluids is constructed from an inner housing (2) which has an inlet for material to be mixed (7) and an outlet for material to be mixed (8) and which comprises two or more layers of undulating or zigzag bars (1; 2) which are parallel to each other and which are disposed one above another rotated by an angle &agr;, preferably of 90°, to each other in an alternating manner and which are joined to each other at their upper or lower vertices. The bars (3, 1; 4, 14) are provided in particular with channels (6, 16; 5, 15) for the passage of a heat transfer fluid so that the mixer can also be employed as a heat exchanger.

Abstract: The apparatus for treating viscous substances described is composed of a heatable vessel with, on one side, an inlet for the materials of the mix and, on the other side, an outlet for the materials of the mix and of two or more corotating shafts to which mixer elements have been attached, characterized in that the mixer elements are composed of two layers of bars, which are arranged crosswise in relation to each other, connected to one another. There are pins running axially attached to the face sides of the bars. These clean the interstices between the bars of the mixer elements of the adjacent shaft.

Abstract: A mixing device for the treatment of viscous substances is described, which mixing device comprises a heatable container 1 with product inlet 5 on the one side of the container and product outlet 6 on the other side of the container, and where appropriate a vapor connection 7, which mixing device comprises a plurality of shafts 2,2' rotating in the same direction. Annular discs 4 are fitted to a shaft 2 by means of spokes 3; in this case, the annular discs 4 are corrugated in the axial direction, and annular discs 4 and spokes 3, together with the shaft 2 carrying them, kinematically clean the annular discs 4', spokes 3' and the adjacent shaft 2' carrying the latter. At all times, the housing 1 is kinematically cleaned by the annular discs 4,4' and spokes 3,3' in the course of rotation of the shafts 2,2'.

Abstract: The invention relates to a fully self-cleaning reactor/mixer having a large freely usable volume, that cleans itself kinematically, consisting of two or more parallel shafts (2, 2') rotating in opposite directions, on which are located spirally arranged, axially offset paddles (3, 3') with scrapers (4, 4', 5, 5') on the front and rear of the paddles, and a surrounding housing (1). Since all the scrapers (4, 4') on the upstream side of the paddles (3, 3') convey the material concerned outwards and all the scrapers (5, 5') on the downstream side of the paddles convey the material inwards, axial conveyance is obtained.

Abstract: The invention relates to a two-step melt process for the production of thermoplastic, solvent-free, low-branching polycarbonates with low --OH terminal group content using a self-cleaning high-viscosity reactor.

Abstract: A multi-axis mixer/reactor with a large available useful capacity, which is kinematically self-cleaning, comprising at least one housing one, two or more parallel, contrarotating shafts 2, 2', on which intermeshing groups of gear wheels 3, 3' are disposed in an axially spaced-apart manner. The gear wheels 3, 3' are connected to one another by kneading bars 5, 5', while further kneading bars 4, 4' which are connected in each case only to one gear wheel are likewise disposed on the end faces of the gear wheels.

Abstract: A self-cleaning reactor/mixer, in particular a disk reactor, with a large available useful capacity, which cleans itself kinematically, comprising at least two or more parallel shafts rotating in the same direction, on which axially offset, not necessarily circular disks with scrapers distributed on their circumference are situated, and a surrounding housing. The reactor/mixer on account of the special geometry of its rotors, which extensively avoids acute product-side angles, is particularly suitable for processing solids-bearing materials to be mixed.

Abstract: A multiple-shaft mixer/reactor with a large free usable volume which cleans itself kinematically consists of two or more parallel shafts (1) rotating in opposite directions, on which are mounted, helically offset, feed blades (2) which are connected to one other by axially extended kneading bars (3), and a surrounding casing (4) as well as optionally an inlet (5) and an outlet (6) for the material to be mixed.

Abstract: The invention relates to disc reactors with a large free usable volume which are kinematically self-cleaning, consisting of two or more parallel counterrotating shafts, on which toothed discs with scrapers, which are distributed over their circumference, are disposed, and a surrounding housing. The toothed discs are arranged perpendicularly to the axes of rotation in planes which are echeloned one behind the other such that they mesh with one another.

Abstract: Disc reactors with large free useful volume which clean themselves kinematically, consisting of two or more parallel shafts, rotating in the same or opposite directions, on which are located axially staggered, circular discs with scrapers distributed over their periphery, and an enclosing casing.