Abstract: An apparatus, for separating liquid droplets out of a feed gas stream, includes a delay vessel for preliminary separation of some of the liquid droplets out of the feed gas stream under gravity, with an inlet line for the feed gas stream and an outlet line for the gas stream which has been depleted of liquid droplets and which flows out of the delay vessel and a tangential supply thereof into a centrifugal droplet separator. The outlet line is arranged in the upper region of the delay vessel and spaced apart from the inlet line to such an extent that the delay time of the gas stream in the delay vessel is at a maximum, and with an outlet line for the liquid separated in the delay vessel at the base thereof.

Abstract: A method for producing nanoscale organic solid particles is proposed, starting from the corresponding sublimable organic solid as raw material, in the form of particles having an average particle diameter in the range of from 1 ?m to 10 mm, which are dispersed in a carrier gas so as to obtain a dispersion, which is relaxed in a convergent nozzle, which is followed by an expansion chamber, and wherein openings are provided rotationally symmetrically about the midaxis of the expansion chamber in the wall of the expansion chamber which comprises the product outlet opening, through which openings a secondary gas flow is injected comprising an inert gas carrier and molecules, ions or nanoscale particles contained in molecularly disperse form therein, which are different from the raw material and which have an average particle diameter that is less than the average particle diameter of the product.

Abstract: What is proposed is a centrifugal droplet separator for separating liquid droplets out of a feed gas stream comprising them, with a vertical longitudinal axis and circular cross section, with a jacket (1) and with hoods (2) at the upper and lower ends of the jacket (1), with tangential supply (3) of the feed gas stream comprising liquid droplets at the jacket (1) and with an outlet stub (4) for the liquid separated out in the centrifugal droplet separator in the region of the lower hood (2), and with a gas outlet stub (7) for the gas stream cleaned in the centrifugal droplet separator in the region of the upper hood (2), wherein two, three or more inlet orifices (9) arranged symmetrically on the circumference of the upper hood (2) for tangential supply of cleaning liquid are provided in the same direction as the supply of the feed gas stream comprising liquid droplets.

Abstract: What is proposed is an apparatus for separating liquid droplets out of a feed gas stream comprising them comprising a delay vessel (1) for preliminary separation of some of the liquid droplets out of the feed gas stream under the action of gravity, with an inlet line (2) for the feed gas stream into the delay vessel (1) and an outlet line (3) for the gas stream which has been depleted of liquid droplets and flows out of the delay vessel (1), and tangential supply thereof into a centrifugal droplet separator (4), the outlet line (3) being arranged in the upper region of the delay vessel (1) and being spaced apart from the inlet line (2) to such an extent that the delay time of the gas stream in the delay vessel (1) is at a maximum, and with an outlet line (5) for the liquid separated in the delay vessel (1) at the base thereof, and wherein the centrifugal droplet separator (4) used is an axially symmetric apparatus with a vertical longitudinal axis and circular cross section, with a jacket and hoods at the upp

Abstract: A process is proposed for continuously purifying a solid mixture comprising a sublimable product of value and components with lower and higher sublimation temperatures by fractional sublimation/desublimation in a hot wall tubular oven (1) with supply of the solid mixture together with an inert gas stream, into which the solid mixture is dispersed by means of a dispersing unit (2), at one end of the hot wall tubular oven (1), heating the dispersed solid mixture in the hot wall tubular oven (1) at a temperature at which the product of value sublimes to obtain a gas mixture comprising components with a higher sublimation temperature than the product of value as solid particles, passing the gas mixture comprising components with a higher sublimation temperature than the product of value as solid particles through a hot gas filter (3) with a suitable pore size in order to retain the solid particles with a higher sublimation temperature than the product of value, cooling the gas mixture from which the components

Abstract: A method for producing nanoscale organic solid particles is proposed, starting from the corresponding sublimable organic solid as raw material, in the form of particles having an average particle diameter in the range of from 1 ?m to 10 mm, which are dispersed in a carrier gas so as to obtain a dispersion, which is relaxed in a convergent nozzle, which is followed by an expansion chamber, and wherein openings are provided rotationally symmetrically about the midaxis of the expansion chamber in the wall of the expansion chamber which comprises the product outlet opening, through which openings a secondary gas flow is injected comprising an inert gas carrier and molecules, ions or nanoscale particles contained in molecularly disperse form therein, which are different from the raw material and which have an average particle diameter that is less than the average particle diameter of the product.

Abstract: An apparatus for the polymerization of olefins, in particular ethylene, comprising a gas-phase fluidized-bed reactor (1), a recycle gas line (2) connected to the reactor for discharging and recirculating the recycle gas stream comprising the unpolymerized olefin and a cyclone (3) located in the recycle gas line for the reduction and precipitation of the solid particles entrained in the recycle gas from the reactor, with the cyclone comprising an upper section (3a) which has an essentially vertical central axis, whose wall extends along a rotationally symmetric body and which is provided with a cyclone inlet (4) arranged eccentrically relative to the central axis, a middle section (3b) which adjoins the upper section (3a) and whose wall extends along a rotationally symmetric body which tapers in a downward direction, a lower section (3c) for discharging the solid particles precipitated from the recycle gas which adjoins the middle section (3b) and whose wall extends along a rotationally symmetric body and a tu

Abstract: Apparatus for the polymerization of olefins, in particular ethylene, comprising a gas-phase fluidized-bed reactor (1), a product offtake line (15) for taking polymer particles either continuously or discontinuously from the reactor (1), which line (15) is connected to a depressurization vessel (2) for separating polymer particles and gas, a recycle gas filter (3) for freeing the gas of entrained fine particles connected to the depressurization vessel (2), a compressor which compresses the gas which has been freed of fine particles and recirculates it into the reactor (1), with the recycle gas filter (3) having an inlet chamber (4) provided with a gas inlet (6), an outlet chamber (5) provided with a gas outlet (7), an essentially vertical sheet-like filter medium (9) for retaining the fine particles which separates the inlet chamber (4) from the outlet chamber (5) and a particle outlet (8).

Abstract: The invention relates to processes for producing nanoparticles, especially pigment particles, comprising the following steps: i) bringing a base substance (1) into the gas phase, ii) generating particles by cooling or reacting the gaseous base substance (1), and iii) applying electrical charge to the particles during particle generation in step ii) in a nanoparticle generation apparatus. The invention further relates to apparatus for producing nanoparticles, having a feed line (28) for transporting the gas stream (29) into the apparatus, a particle generation and charging area for substantially simultaneous generation and charging of nanoparticles, and a takeoff line (30) for transporting the charged nanoparticles from the particle generation and charging area.