Synthesis technology for improving yield of nanometer Y type molecular sieve

Abstract

The invention discloses a synthesis technology for improving the yield of a nanometer Y type molecular sieve. The technology comprises the following steps: sequentially adding an organic template and an aluminum source to deionized water under stirring, stirring the organic template and the aluminum source until the organic template and the aluminum source are dissolved, and adding a silicon source and a sodium source; transferring the above synthesis system to a reaction kettle, sealing the reaction kettle, heating the reaction kettle to 90-130DEG C, and carrying out hydrothermal crystallization for 60-110h; separating the above obtained solid-liquid mixture to obtain a solid which is nanometer Y type molecular sieve, and reserving a mother liquor; and supplementing a proper amount of the reaction raw materials to the obtained mother liquor, continuously crystallizing the above material, and carrying out solid-liquid separation to obtain the nanometer Y type molecular sieve and the reaction mother liquor. Supplementation of the reaction raw materials, crystallization and solid-liquid separation are repeated to improve the yield of the nanometer Y type molecular sieve. The technology effectively utilizes unreacted silicon, aluminum, the organic template and other raw materials in the synthesis system, so the yield of the nanometer Y type molecular sieve is improved to 40% or above; and the particle size of the above product is 100nm or below, and the time required by every crystallization is short.

Description

technical field [0001] The invention belongs to the field of chemical technology, and in particular relates to a synthesis process for improving the yield of nanometer Y-type molecular sieves. Background technique [0002] Molecular sieves are materials containing precise and single tiny pores that can be used to adsorb gases or liquids. Sufficiently small molecules can be adsorbed through the pores, while larger molecules cannot. Unlike a normal sieve it operates on a molecular level. For example, a water molecule small enough to pass through but a molecule slightly larger than it cannot. Therefore, molecular sieves are often used as desiccants. A molecular sieve can absorb up to 22% of its own weight in water. Molecular sieves are often used in the petroleum industry, especially for the purification of gases. In the current synthesis process for improving the yield of nanometer Y-type molecular sieves, the process flow is not easy to implement, the separation effici...

AI Technical Summary

Problems solved by technology

In the current synthesis process for improving the yield of nanometer Y-type molecular sieves, the process flow is not easy to implement, the separation efficiency is low, the recycling of raw materials cannot be realized, the production process is complicated, and the production efficiency is low.