Abstract: The invention relates to a method for continuously and dynamically mixing at least two fluids. Said method comprises the following steps: a) the rotor (1) of a micromixer is rotatably driven, said micromixer comprising a rotor (1) which is provided with a shaft (2) encompassing blades (3) that are arranged in groups (3a-3g), a stator (4) which is provided with at least one inlet (5) for a first fluid, at least one inlet (6) for a second fluid, and an outlet (7); b) the fluids are fed into the micromixer; and c) a micromixture of the fluids is collected at the outlet (7) of the micromixer. The inventive method is particularly suitable for rapid and/or complex kinetic chemical reactions such as anionic polymerization. The invention also relates to a micromixer for carrying out said method.

Abstract: The invention relates to a method for continuously and dynamically mixing at least two fluids. Said method comprises the following steps: a) the rotor (1) of a micromixer is rotatably driven, said micromixer comprising a rotor (1) which is provided with a shaft (2) encompassing blades (3) that are arranged in groups (3a-3g), a stator (4) which is provided with at least one inlet (5) for a first fluid, at least one inlet (6) for a second fluid, and an outlet (7); b) the fluids are fed into the micromixer; and c) a micromixture of the fluids is collected at the outlet (7) of the micromixer. The inventive method is particularly suitable for rapid and/or complex kinetic chemical reactions such as anionic polymerization. The invention also relates to a micromixer for carrying out said method.

Abstract: An apparatus and method for the spray drying of solvent-containing compositions. A liquid or paste-form solvent-containing composition is heated to a temperature above the boiling point of the solvent, transported under excess pressure and at a temperature above the boiling point of the solvent to a relaxation space where it is sprayed to evaporate the solvent. The relaxation space is not under excess pressure and is at a temperature that is above the boiling point of the solvent.

Abstract: The invention relates to a device for spray-drying solvent-containing compositions, to a method for spray-drying solvent-containing compositions, and to the uses of the inventive device and of the inventive method, especially for producing powder washing and cleaning agents.

Abstract: Liquid to be atomized is uniformly sprayed on the inner surface of a hollow rotating cylinder, for example by means of one- or two-fluid-nozzles and is thus distributed on apertures provided in the cylinder wall. The rotation of the cylinder causes the liquid to flow outwards through the apertures. Droplets are generated when the liquid flows out of the apertures by laminary decomposition of the jet. The flow rate in each aperture lies in the range 1.0<{dot over (V)}A (a3&rgr;5/&sgr;5)0.25<16 to prevent the droplets from becoming too large and to satisfy the condition of an adequate flow laminarity, i.e. for the value of the Reynolds Number for the continuous liquid flow in the apertures not to exceed Re&dgr; 400. {dot over (V)}A represents the flow rate of the liquid in each aperture, a represents the centrifugal acceleration at the outer surface of the cylinder, &rgr; represents the density of the liquid, and 8 indicates the surface tension of the liquid.

Abstract: The liquid to be atomized is uniformly sprayed on the inner surface of a hollow rotating cylinder, for example by means of one- or two-fluid-nozzles and is thus distributed on bores provided in the cylinder wall. The rotation of the cylinder causes the liquid to flow outwards through the bores. Droplets are generated when the liquid flows out of the bores by laminary decomposition of the jet. The flow rate in each bore lies in the range 1.0<V.sub.B (a.sup.3 .rho..sup.5 /.sigma..sup.5).sup.0.25 <16 to prevent the droplets from becoming too large and to satisfy the condition of an adequate flow laminarity, i.e. for the value of the Reynolds number for the continuous liquid flow in the boress not to exceed Re.sub..delta. 400. V.sub.B represents the flow rate of the liquid in each bore, a represents the centrifugal acceleration at the outer surface of the cylinder, .rho. represents the density of the liquid and .delta. indicates the surface tension of the liquid.

Abstract: For improving an adequate statement about the processing properties of granulated material to be added to unvulcanized rubber a testing device is used consisting of a support for the test sample, a wedge-shaped tool and a linearly acting pressure generator, whereby as support, bearing means for agglomerates are arranged on either side of the working plane of the movable wedge-shaped tool with bearing forces acting predominantly parallel thereto.

Abstract: Selected chemical species in fluid media such as solutions, mixtures of liquids, and suspensions are crystallized by indirect cooling of the fluid media. Crystals are prevented from sticking to the heat exchange surface by pulsating the fluid with a component of pulsation parallel to the heat exchange surface. The crystals can then be separated from the residual fluid.