Synthesis of supported actalysts by impregnation and drying using aqueous chelated metal complexes

摘要

Work is reviewed on the synthesis of supported metal and metal oxide catalysts using impregnatin of an aqueous solution of chelated metal ions foolwed by drying Th nature of the aqueous solutions jof chelated complexes is discussed first Upon solvent evaporation a steep increase in viscosity is apparent which inhibits redistribution of ipregnated solution upon drying of the support bodies Furthermore a gel-like phase is formed that favors high dispersions of the actie phase afger full drying Second several expamples are dealt with in some detail in particular supported irom nickel and cobalt-molybdenum catalysts finally an overview is presented for metal and metal oxide precursors that can be sutitable deposited uon support matericals usign chelated aqueosu metal complex nsolutions.