METHOD FOR THE PREPARATION OF CRYSTALLINE ALUMINOSILICATES THROUGH THE UTILIZATION OF WASTE UTERINE WATER FROM SYNTHESES OF ZEOLITES

摘要

A method for the preparation of crystalline aluminosilicates which represents a two-stage process, integrated in one, with the goal of utilization of waste uterine water from a previous synthesis, whereby at the first stage, after a certain period of maturation of the gel and after the nucleation has taken place through centrifugation or another method, the uterine water is separated from the gel, and this water is used in the second stage, and the crystallization of the separated gel is carried out through a transformation in the presence of a vapor phase, generated by the moisture present in the gel, and in the second stage, the separated uterine water from the previous synthesis is utilized as an additive to another output gel for the synthesis of crystalline aluminosilicates. The proposed method is characterized by the fact that it provides the possibility to utilize uterine water from the synthesis of zeolites separated from the gel before its crystallization with the goal of synthesizing crystalline aluminosilicates of the same or other type from which the uterine water originates. The method is illustrated by the use of uterine water from the synthesis of ЕМТ-type zeolite for the synthesis of faujasite type (FAU) crystalline aluminosilicates, and also for the synthesis of germanium-containing FAU-type crystalline aluminosilicates with the use of waste uterine water from the synthesis of germanium-containing ЕМТ-type zeolite. 6 claims, 12 figures