Method for preparing superfine silica gel powder with high adsorptive value and adjustable pore volume

A technology of micropowder silica gel and high adsorption, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve problems such as unstable quality, high price, poor performance of micropowder silica gel, achieve single pore size distribution, increase adsorption value, The effect of uniform structure

Inactive Publication Date: 2009-11-04
KENLI SANHE NEW MATERIAL TECH
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Problems solved by technology

The micro-powder silica gel currently manufactured in China has poor performance and unstable quality. Compared with similar foreign products, there is a big gap, and the

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  • Method for preparing superfine silica gel powder with high adsorptive value and adjustable pore volume

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Embodiment approach

[0018] The preparation method is specifically as follows: add a certain amount of additives to the sulfuric acid solution with a concentration of 22% as required, pour it into the acid metering tank, add a certain amount of additives to the sodium silicate solution with a concentration of 18% as required, and pour it into the acid metering tank. Put the two solutions into the alkali metering tank, pass the two kinds of solutions through the conventional granulation equipment, and under the pressure of 0.5MPa, synthesize and react at the temperature of 45-55°C to form gel particles. Add aging agent at a ratio of 1:100, and perform aging at a temperature of 35-45°C. The aging time is 3-6 hours. The temperature is 35-45°C, and the acid treatment time is 3-5 hours. After the acid treatment, the acid treatment solution is released, poured into 70-80°C water and washed 5 times in a string of four. After washing, put the gel particles into the The drying tunnel is used for drying, th...

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Abstract

The invention relates to a method for preparing superfine silica gel powder with high adsorptive value and adjustable pore volume, which is mainly used for preparing the superfine silica gel powder with high adsorptive value and adjustable pore volume. The preparation method mainly comprises the following steps: adopting a sulfuric acid solution and a sodium silicate solution as raw materials, adding an auxiliary agent into the sulfuric acid solution and the sodium silicate solution respectively, granulating the obtained product into gel particles after synthesis reaction, placing the gel particles into an aging tank, adding an aging agent for aging, adopting an acid modifier to perform acid treatment on the gel particles, and preparing the superfine silica gel powder with high adsorptive value and adjustable pore volume after the processes of washing, drying, crushing and classifying. The average pore diameter of the prepared superfine silica gel powder with high adsorptive value and adjustable pore volume is between 5 and 30 nanometers; the iron content (as calculated by Fe2O3) is less than 10 ppm; and the content of heavy metals (as calculated by plumbum) is less than 8 ppm. The product is mainly used as a molecular sieve carrier in the petrochemical industry, an adsorbent in the beer industry, and a glidant in the medicine industry.

Description

1. Technical field: [0001] The invention belongs to a preparation method in the field of chemical industry, and is mainly used for the preparation of micropowder silica gel with high adsorption value and adjustable pore volume. 2. Background technology: [0002] Micropowder silica gel with adjustable pore volume and high adsorption value is a high-tech product. It is mainly used in petrochemical industries as molecular sieve carriers, beer as adsorbents, and pharmaceuticals as flow aids. Its manufacturing technology requires high requirements. The micro-powder silica gel currently manufactured in China has poor performance and unstable quality. Compared with similar foreign products, there is a big gap, and the price is high. There is an urgent need for a high-performance, low-cost micro-powder silica gel preparation process to produce this product. products to meet market demand. 3. Contents of the invention: [0003] The purpose of the present invention is to provide a ...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30
Inventor 梁延民冷亮曹会民伊常亮
Owner KENLI SANHE NEW MATERIAL TECH
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