Abstract: The disclosure involves a method for reducing the content of NOx and N2O in gases. The method includes the conduction of a gas containing N2O and NOX over a series of two catalyst beds containing of one or more zeolites charged with iron followed by the: addition of a reduction agent for NOX between the catalyst beds. The first catalyst bed reaction zone is used to degrade the N2O and the catalyst bed second reaction zone reduces the NOX and breaks down at least part of the remaining N2O. The inventive device comprises at least one radially traversed catalyst bed.

Abstract: A fluidized-bed reactor for the oxychlorination of ethylene, oxygen and HCL, comprises a heat exchanger, having tube packets in the fluidized-bed for releasing the heat evolved from exothermic reaction to a heat-transfer medium in the tube packets, in particular to water/steam. The tube packets come into contact with water via a ring pipe and the steam being removed via a ring pipe to provide an economical solution with which expensive drilled passages are avoided, the calculation for ring pipes is facilitated and a large number of wall passages is dispensed with. This is achieved by the ring pipe being mounted as a collector or chamber directly on the reactor wall.

Abstract: A can or drum changing device for fiber spinning plants in which multi-fiber yarn supplied continuously from a textile finishing machine is fed into cans or drums for intermediate storage. The can or drum which is to be filled is placed on a fixed or movable platform, and the can changing device enables the filled can to be exchanged for an empty one. Both cans or drums are lifted before starting the changing procedure, and both lifting devices have a common pivot so that during the changing procedure, both cans approach each other and are freely suspended without interferring with each other. When the multi-fiber yarn from the textile finishing machine has filled one can, the continuous yarn is then transferred to the juxtaposed empty can, both cans being placed so close together at that time that the yarn cannot drop between them. The filled can is then lifted from the rotary table and the empty can is lowered onto such table.