A method for the synthesis of highly pure naa - zeolite from raw allophane, loams

摘要

A method for the production of naa - zeolite from raw allophane loams extend, in whichA) extend as far as the raw allophane clays with hot, preferably 90 – 100°C. hot sodium hydroxide solution are added, wherein initially the raw allophane extend in the valuable minerals present loams go into solution,B) the reaction mixture, consisting of dissolved valuable minerals and undissolved impurities, immediately after the release of the valuable minerals by rapid cooling or dilution with water is quenched in a controlled manner,C) the reaction mixture is then by filtration is freed from undissolved impurities,D) the purified reaction solution further up to the precipitation of the naa - zeolite is stirred,E) of the precipitated is filtered off - zeolite naa.