PRODUCTION OF HYDROTHERMALLY-STABILISED ZEOLITE MONOLITHS FOR FLUID PURIFICATION

摘要

The invention relates to a method for the production of natural or synthetic zeolite monoliths, using other silicates as additives which provide rheological properties that enable extrusion moulding of honeycomb-type structures. The mechanical properties of the monoliths obtained are stabilised by means of hydrothermal treatment with sodium silicate solutions. The product thus obtained is a honeycomb-type monolith which retains the physical and chemical properties of the zeolite contained therein practically unaltered, such that it can be used as a catalyst, absorbent or ionic exchanger in industrial fluid purification processes. Moreover, the monoliths thus obtained overcome the shortcomings of other monoliths stabilised using thermal treatments which can significantly damage the properties of the zeolite, limiting the effectiveness thereof in fluid purification processes.