Rapid ion exchange method of molecular sieve

Abstract

The invention relates to a rapid ion exchange method of a molecular sieve so as to mainly solve technical problems of long exchange time and low utilization rate of an exchange fluid existing in ion exchange of a molecular sieve. The rapid ion exchange method of a molecular sieve contains the following steps: a) a sodium molecular sieve and an ion exchange solution are mixed, the molecular sieve is dispersed in the solution to form a mixture, the liquid-solid weight ratio of the molecular sieve to the solution is 0.1-50, and weight concentration of the solution is 0.01-50%; b) the above mixture is put into a microwave environment, microwave heating is adopted for exchange, heating-up time of microwave heating is 0.01-10h, the temperature rises to 180 DEG C from the temperature of the mixture, and constant temperature time is 0-20h; and c) after microwave ion exchange, the above mixture is filtered to obtain the required molecular sieve after ion exchange. By the technical scheme, the above problems are solved well. The rapid ion exchange method can be applied in industrial production for preparation of a molecular sieve based catalyst.

Description

technical field [0001] The invention relates to a molecular sieve rapid ion exchange method, in particular to a molecular sieve rapid ion exchange method using a microwave heating method. Background technique [0002] Zeolite molecular sieve is an inorganic silicon-containing crystal. Its skeleton has pores with regular and orderly arrangement and molecular size. It is widely used as an adsorbent for separating gas or liquid mixtures. It is also widely used in catalysis, ion exchange and other fields. An important property of zeolite molecular sieve can change the cations in the molecular sieve, thereby changing the adsorption and catalytic performance of the molecular sieve. Among them, acidic zeolite has good catalytic activity and is the most widely used. It is often used in catalytic reaction processes such as catalytic cracking, alkylation, isomerization, disproportionation and transalkylation, and reforming. [0003] The most important synthetic zeolite molecular sie...

AI Technical Summary

Problems solved by technology

[0008] The technical problem mainly solved by the present invention is the long time of the exchange process in the existing ion exchange, the low utilization rate of the exchange liquid and ...