Abstract: The present invention relates to a method for the refining of a material comprising iron oxide and at least one contaminant selected from the group consisting of halogen and sulfur by reducing the content of the at least one contaminant, characterized by calcining the material in the presence of a gas containing water vapor. The invention also relates to a refined material obtainable from such a method and the use for catalyst production.

Abstract: The invention relates to a centrifugal droplet separator for separating liquid droplets out of a gas stream, comprising a shell (1) having a circular cross section and a vertical longitudinal axis (11), an upper hood (2) that bounds the shell (1) at the top and has a gas exit port (7) for the gas stream cleaned in the centrifugal droplet separator, a drip plate (8) disposed beneath the gas exit port (7), a lower hood (10) that bounds the shell (1) at the bottom and has a liquid exit port (4) for removal of the deposited liquid droplets, and an inlet (3) that opens tangentially into the shell (1) for supply of the gas stream, wherein there are at least two nozzles (9) for feeding a stabilizer liquid into the interior of the centrifugal droplet separator, the respective nozzle outlet (15) of which is disposed between the tangential inlet (3) and the drip plate (8) in vertical direction, where the main spraying direction (12) of the nozzles (9) is directed upward at an internal angle of 0 to 60° relative to t

Abstract: Described is a monolithic support member comprising channels with walls separating the channels and having a coating deposited thereon, the non-coated channels having a polygonal cross-section profile, wherein the mean thickness dC of the coating in a corner of said cross-section profile is smaller than or equal to the mean thickness dE of the coating on an edge of said cross-section profile plus 85 micrometer. Also described is a method for the preparation of such coated monolithic support member. Further described is the use of such coated monolithic support member as a catalytic article in automotive exhaust gas treatment.

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: 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: The invention relates to a monolithic support member comprising channels with walls separating the channels from each other and having a coating deposited thereon, the non-coated channels having a polygonal cross-section profile, wherein the mean thickness dC of the coating in a corner of said cross-section profile is smaller than or equal to the mean thickness dE of the coating on an edge of said cross-section profile plus 85 micrometer; and further relates to a method for the preparation of such coated monolithic support member, the method comprising (i) providing a suspension having a viscosity in the range of from 0.5 to 100 mPas and having a solid content in the range of from 1 to 40 wt.