Synthesis Of Serial Zeolite Molecular Sieves In PEG System

The synthesis of high - silica Y zeolite using low - temperature sol - gel process is first reported in this papar. The experiment shows that the Y zeolite with high framework SiO2/Al2O3 ratio and good crystalinity can be obtained in this way. And more, the factors that affect the final results such as aging, reaction composition are discussed here with the purpose of studying the most suitable reaction conditions.The use of open -chain crown ether -PEG as template makes the direct synthesis of Y zeolite with high framework SiO2/Al2O3 ratio possible , the reaction time shorten and the reaction cost lower on the line of its crystalization dynamic character. Study on the synthesis of novel molecular sieve using PEG template. The mesurement and characterization of the sample synthesized with PEG as template verfifies the existence of large - pore structure and its high thermal stability. In the study of the synthesis process, the template mechanism model is established on the basis of the crown ether -like characters of PEG by using the mordern supra molecular chemistry theory and method.