Abstract: The invention relates to a process for the separation of charged aerosols, in which the aerosol is, first of all, separated in a collector electrode, which can be flowed through under the effect of a space charge. For the production of a high electrical potential, electrical charges of the aerosol to be separated are subsequently collected on the collector electrode. Finally, the residual aerosol exiting from the collector electrode is guided through the separation zone at high field intensity. In accordance with the invention, the invention also relates to a device for the implementation of the above-stated process.

Abstract: The invention relates to a method for producing carbon black or other flame aerosols, comprising the following steps: the heat is removed from the flame by dissipation and/or radiation; a thin gas boundary layer is formed; the flow formed by the flame and the gas boundary layer is accelerated or expanded; the obtained aerosol is withdrawn; and the cooling surface is cleaned. The invention further relates to a device for carrying out such a method and a black carbon having a maximum pH value of 6.0, a maximum ignition residue of 0.1 percent, and a maximum 5 ?m screening refuse of 200 ppm. The inventive black carbon can be used in rubber, plastic, printing inks, inks, inkjet inks, toners, lacquers, dyes, paper, bitumen, concrete, and other construction materials.

Abstract: The invention relates to a method for producing carbon black or other flame aerosols, comprising the following steps: the heat is removed from the flame by dissipation and/or radiation; a thin gas boundary layer is formed; the flow formed by the flame and the gas boundary layer is accelerated or expanded; the obtained aerosol is withdrawn; and the cooling surface is cleaned. The invention further relates to a device for carrying out such a method and a black carbon having a maximum pH value of 6.0, a maximum ignition residue of 0.1 percent, and a maximum 5 ?m screening refuse of 200 ppm. The inventive black carbon can be used in rubber, plastic, printing inks, inks, inkjet inks, toners, lacquers, dyes, paper, bitumen, concrete, and other construction materials.

Abstract: The invention relates to a extensional flow layer-separating reactor comprising a channel, in which at least two educt products and at least one separation fluid for spatially separating said two products are introduced, an extension area which is adjacent to the channel in such a way that the educt product and the separation fluid which are drawn in substantially laminar layers, flow at a greater speed and a turbulence generating device for generating the turbulent micro mixture of the educt products.

Abstract: A method for producing carbon black or other flame aerosols, comprising the following steps: the heat is removed from the flame by dissipation and/or radiation; a thin gas boundary layer is formed; the flow formed by the flame and the gas boundary layer is accelerated or expanded; the obtained aerosol is withdrawn; and the cooling surface is cleaned. The invention further relates to a device for carrying out such a method and a black carbon having a maximum pH value of 6.0, a maximum ignition residue of 0.1 percent, and a maximum 5 ?m screening refuse of 200 ppm. The inventive black carbon can be used in rubber, plastic, bitumen, concrete, and other construction materials.

Abstract: The invention relates to a device for charging or adjusting the charge of gas-borne particles into a defined charge distribution under utilization of corona discharge in the aerosol space. In addition to an appropriate geometry of the charger and the electrodes, the voltage waveform and the voltage regulation are of great significance for the result. The application further relates to a method for operating the device.

Abstract: The invention relates to a device for charging or adjusting the charge of gas-borne particles into a defined charge distribution under utilization of corona discharge in the aerosol space. In addition to an appropriate geometry of the charger and the electrodes, the voltage waveform and the voltage regulation are of great significance for the result. The application further relates to a method for operating the device.

Abstract: The invention relates to a process for measuring particle size by measuring the attenuation of radiation after its passage through a defined measuring section containing a disperse system. According to the invention the temporally fluctuating transmission signal is recorded with variable time or spatial resolution. The transmission signals recorded then undergo a non-linear operation. The result of that non-linear operation is represented and analyzed as a spectral curve, i.e., as a function of the spatial or temporal resolution.

Abstract: Measurement of density and mass flow of disperse systems with a gas as fluid phase flowing through a pipe is carried out by introducing sound in the frequency range 20-2,000 Hz in the middle of the cross-section of the pipe. The sound has a wavelength which is at least half the pipe diameter. The speed propagation of sound waves in the flowing disperse system is is measured in the axial direction of flow over at least two transit sections of differing length; and the speed propagation of sound waves in the flowing disperse system is also measured in a direction contrary to the axial direction of flow over at least two transit sections of differing length. The fill level of a reception member in communication with a line of the disperse system is calculated from the measured mass flow rate over a period of time.

Abstract: Simultaneous measuring of the concentration of solids and particle size distribution in a suspension is effected by exciting the suspension by ultrasonic waves of a plurality of frequencies, the wavelength at the lowest frequency being greater than the diameter of the largest particles to be expected and the wavelength of the highest frequency being smaller than the diameter of the smallest particles to be expected. The dimensional spectrum of the solid particles is divided into a plurality of dimensional intervals for which the respective solids concentrations are determined by measuring the radiation absorption of each frequency used for irradiation and representing the same as the sum of the products of the absorption coefficients which are specific of the frequency and dimensional interval with the unknown particle concentrations. This results in a linear system of equations which is solved with respect to the unknown concentrations.