THE SYNTHESIS AND PROPERTIES OF AN ADSORBENT AND SUPPORT BASED ON CALCIUM DIALUMINATE, THE COMPONENT OF HIGH-ALUMINA CEMENTS

A new method is developed for the synthesis of an adsorbent and suppor t with a high, regulated surface area (up to approximately 300 m2/g) a nd a high mechanical strength (40 - 70 MPa). The surface area retains the value of 35 - 90 m2/g even after high temperature treatment (appro ximately 1000-degrees-C). The process of the surface area enhancement from 2 - 4 to 300 m2/g involves one or two stages: hydration in neutra l or basic media and acid treatment. The effect of different parameter s (treatment temperature and duration, reagent nature, and acid compon ent concentration) on the surface area is evaluated. Using XRD, IR, TG A, DTA, and chemical analysis data, consideration is given to the reac tions which are related to the evolution of the phase composition and development of the surface area in the course of the formation of the new adsorbent and support. The promising aspects of application of the new material in catalysis are discussed.