tube and the losses of substance are low due to the use of a continuous process the range of product quality is narrow compared with the rotary tube the losses during start up and shut down are very low the powder in the waste air filters cyclone of a rotary tube has a wide range of product quality and often cannot be used while in the process according to the invention the range of product quality in the waste air filter cyclone is a very narrow range the in situ treatment of the waste air can have an effect as a further advantage the salts are often nitrates acetates and ammonium compounds the decomposition products of which no nh 3 and chno can be reduced in amount by adjusting the composition of the hot waste gases or can be treated in a downstream catalyst without additional heating up 2 base substances support material possibly in shell form impregnated covered coated with oxides metals nitrides carbides the substances prepared according to the invention can be employed as a catalyst for the production of ductile ceramic components for the production of components with a quantum mechanics activity in particular sensors and photoelectrically active emitters and as oxygen stores no x stores c n h m stores for catalysis and adsorbents the process according to the invention is shown and explained in more detail in the drawing 0041 fig1 shows a burner 1 to which the flow through tube 2 is connected the washer 3 the separator 4 the filter 5 and the fan 6 are connected to the flow through tube 2 in the process according to the invention a dispersion suspension or emulsion a secondary gas combustion air and fuel are introduced into the burner 1 the reaction.