High-adsorption low-powder-falling zero-pollution 3A molecular sieve and forming process and application thereof

Abstract

The invention relates to a high-adsorption low-powder-falling zero-pollution 3A molecular sieve and a forming process and application thereof. The molecular sieve is prepared from the following components in parts by weight: 60-72 parts of 3A raw material powder, 28-40 parts of clay and 3-5 parts of high clay, the forming process of the molecular sieve comprises the following steps: (1) burdening,(2) mixing, (3) granulating, (4) polishing, (5) calcining at low temperature and (6) high-temperature activation, and the molecular sieve is applied to hollow glass. 3A raw material powder, clay andhigh clay are adopted as raw materials, the viscosity of the clay is limited to be 1700-2000 mpa.s, and the viscosity of the high clay is limited to be 2000-2400 mpa.s, so that the preparation of the3A molecular sieve with high adsorbability and a low powder falling degree is facilitated, the raw materials are easy to obtain, few in variety and free of chemical components and free of pollution, and the 3A molecular sieve prepared by adopting the formula provided by the invention has the advantages of high adsorption, low powder falling and zero pollution.

Description

technical field [0001] The invention relates to the technical field of 3A molecular sieves, in particular to a 3A molecular sieve with high adsorption and low powder falling and zero pollution, and its forming process and application. Background technique [0002] 3A molecular sieve is a kind of crystalline aluminosilicate mineral pellets. Its lattice pores are only 3 angstroms. It is the molecular sieve with the smallest pores among all molecular sieves. It can only absorb water and cannot absorb any other components in the air. It is mainly used The drying of the air in the double-layer glass interlayer is an indispensable and crucial part of the composition of insulating glass. [0003] The traditional 3A molecular sieve is obtained by 4A zeolite molecular sieve through potassium ion exchange under certain hydrothermal liquid conditions. Before potassium ion exchange, it is already a 4A molecular sieve composite profile, and the profile is subjected to hydrothermal liquid...

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Problems solved by technology

[0005] The potassium element in the low-potassium 3A zeolite molecular sieve is low, which has the advantage of saving energy, and the adsorption performance can reach the same adsorption effect as the 3A molecular sieve prepared by the hydrothermal ion exchange method; however, whether it is a traditional 3A molecular sieve or a low-potassium Type molecular sieves require surface post-treatment after molding to reduce the dust adsorbed on the surface of the molecular sieve. The post-treatment process is time-consuming and laborious. Therefore, it is urgent to develop a 3A molecular sieve with high adsorption, no pollution and low dust.

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