ZEOLITE OBTAINED FROM INORGANIC COMPONENT RECOVERED FROM HARD WATER AS STARTING RAW MATERIAL

PURPOSE:The titles synthetic zeolite useful as an adsorbent, various kinds of catalysts, etc., obtained by using solid inorganic components such as Si, Al, Na, Ca, Fe, etc. recovered from hard water as a starting raw material, subjecting it to hydrothermal treatment so that it is crystallized. CONSTITUTION:A foaming agent consisting of a nonionic surface active agent and a phosphate and a collector consisting of beef tallow diamine, etc. are added to hard water, inorganic componens such as Si, Al, Na, Ca, Fe, etc. are floated, and separated. They are dried and calcined to recover an inorganic material containing SiO2, Al2O3, Na2O, CaO, Fe2O3, etc., having large specific surface area, and pore diameters in a wide range. The solid material is suspended in a basic aqueous solution, and, if necessary, another inorganic component, an organic crystallizing agent, etc. are added to it, the suspension is subjected to hydrothermal treatment and is crystallized to give synthetic zeolite. This zeolite alone or its mixture with another component or the above-mentioned solid material is usable as an adsorbent, dehydrating agent, oil-removing agent, heat accumulative agent, various kinds of catalysts, and a catalytic carrier.