A type zeolite and preparation method thereof

Abstract

The invention provides an A type zeolite and a preparation method thereof. The invention solves the problems of high manufacture cost and complex process step of the A type zeolite in the prior art and the technical problems of reduced performance stability of the generated zeolite and difficult control of zeolite quality when the combustion ash, such as paddy husk ash, bagasse ash, diatomite, and the like are adopted as raw materials. The A type zeolite is prepared from burning ash, the main component of which is SiO2, as a raw material in an alkaline solution through hydrothermal reaction. The method comprises the following steps of: hydrothermally dissolving the burning ash in the alkaline solution; adding sodium metaaluminate for crystallization; washing in water, filtering and drying to obtain the A type zeolite. The method has shorter reaction time, high crystallizing speed, more favorable and stable performance of the generated A type zeolite and obvious economic benefit, obviously reduces the production cost, simplifies the preparation step, and improves the yield and the market competition of products.

Description

technical field The invention belongs to the technical field of A-type zeolite, and more specifically relates to an A-type zeolite and a preparation method thereof. Background technique Previously, zeolites were produced by various methods. Among them are production methods using industrial waste as raw materials. For example, using combustion ashes such as rice hull ash, bagasse ash, and diatomaceous earth as raw materials to produce zeolite, but due to the SiO in these combustion ash 2 with Al 2 o 3 The content ratio of zeolite is often uncertain and not a stable fixed value, so the performance stability of the generated zeolite is reduced, and it is difficult to control the quality of zeolite. Generally speaking, due to the SiO contained in these combustion ash 2 and Al 2 o 3 , if the hydrothermal reaction is carried out directly in the alkaline solution, when the initial reaction is carried out in the alkaline hot water, the two components are selectively dissolve...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to provide a type A zeolite and its preparation method; to solve the problems of high production cost and complicated process steps of type A zeolite in the prior art, and mainly solve the problem of using rice husk ash, bagasse ash, diatomaceous earth, etc. When the combustion ash is used as raw material, the performance stability of the generated zeolite is reduced, and it is difficult to control the technical problem of the quality of the zeolite

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