Columnar porous catalyst carrier and preparation method thereof

Abstract

The invention belongs to the field of catalyst carrier preparation, and discloses a columnar porous catalyst carrier and a preparation method thereof. The mass fraction of SiO2 in the columnar porouscatalyst carrier can reach 95%, the mass fraction of the porous molding agent can reach 50%, the pore volume can reach 1.2 ml / g, and the specific surface area can reach 900 m < 2 > / g; the mass fraction of Na2O is smaller than or equal to 0.15%, the mass fraction of CaO, MgO and Fe2O3 is smaller than or equal to 0.03%, and the compressive strength can reach 120 N. The preparation method of the columnar porous catalyst carrier comprises the following six production steps: preparing a component A, preparing a component B, mixing the component A with the component B, granulating, aging and drying.The columnar porous catalyst carrier is large in pore volume and specific surface area, high in compressive strength, low in metal ion impurity content, capable of avoiding particle breakage in loading or use, capable of effectively avoiding pollution to a reaction system and products in the use process, environmentally friendly in the production process and wide in application field.

Description

technical field [0001] The invention belongs to the field of catalyst carrier preparation, in particular to a columnar porous catalyst carrier and a preparation method thereof. Background technique [0002] The main chemical formula of mesoporous silica is mSiO 2 ·nH 2 O, its chemical properties are stable, non-combustible, non-toxic and tasteless, and does not react with other substances except hydrofluoric acid and liquid alkali. It is mainly used in the separation and purification of the pharmaceutical industry, catalysts and catalyst carriers in the petrochemical industry. Used in desiccant, impurity adsorbent in liquid phase and gas separation, etc. [0003] There are four main methods for preparing mesoporous silica in the prior art: sol-gel method, precipitation method, gas phase method and silicone grease hydrolysis method. The sol-gel method, precipitation method and gas phase method are used in industrial scale production. Both sol-gel method and precipitation m...

AI Technical Summary

Problems solved by technology

Amorphous silica is not strong enough to break easily, so it has limitations in loading reaction and use

Spherical silica products are broken due to the adsorption stress during liquid phase modification, and the strength is not enough in the use after loading, which leads to increased loss, and the broken debris causes increased air resistance and reduces reaction efficiency, so it also has limitations.