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handle: 10261/32868
[EN] Process for synthesizing zeolites from combustion residues (flying ashes) which contain aluminosilicated phases and a grain size between 0.1 and 100 $g(m)m, comprising subjecting said residues to a hydrothermal treatment of alkaline activation in a reactor by using aqueous solutions of NaOH, KOH or mixtures thereof and thereafter irradiating the reaction mixture contained in the reactor with microwaves. The reaction takes place at a temperature comprised between 100 and 300 °C, a pressure corresponding to the pressure of the vapor generated and during a period of time comprised between 1 and 120 minutes until the final material containing the zeolite is obtained.
[ES] Un procedimiento para sintetizar zeolitas a partir de residuos de combustión (cenizas volantes) que contienen fases aluminosilicatadas y una granolometría entre 0.1 - 100 $g(m)m, que comprende someter dichos residuos a un tratamiento hidrotermal de activación alcalina en un reactor utilizando disoluciones acuosas de NaOH, KOH o mezclas de las mismas y, posteriormente, irradiar la mezcla de reacción contenida en el reactor con microondas. La reacción tiene lugar a una temperatura entre 100 y 300 °C, una presión correspondiente a la presión de vapor generada y un tiempo entre 1 y 120 minutos, hasta la obtención del material final que contiene la zeolita.
Fecha de presentación internacional 16-02-1999.-- Titular: Consejo Superior de Investigaciones Científicas (CSIC).
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