A kind of attapulgite/silicon dioxide composite powder and its preparation method

A technology of attapulgite and silicon dioxide, applied in chemical instruments and methods, silicon compounds, alkali metal compounds, etc., can solve the problems of high production cost and cumbersome process, increase mesopore content, reduce manufacturing cost, good The effect of adsorption performance

Active Publication Date: 2011-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of high production cost and complicated process in the prior art, the present invention provides an attapulgite / silicon dioxide composite powder and a preparation method thereof, the composite powder has a porous structure and the preparation process is simple

Method used

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  • A kind of attapulgite/silicon dioxide composite powder and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1000 grams of attapulgite (produced by Mingmei Mineral Co., Ltd., Anhui Province) is mixed with 19000 milliliters of water at a concentration of 5 wt%, dispersed through a high-shear disperser (produced by FLUKO, model FA25) and placed for more than one week, and then passed through high Dispersion with a shear disperser yields a fully exfoliated suspension. Get 1050 grams and 70 grams of silica sol with the suspension of dispersed attapulgite (Qingdao chemical plant production, trade mark ZA-25, SiO 2 Concentration 25wt%, particle size about 10-20nm, pH value about 7) mixed according to the ratio of 75:25 of their respective dry weights, and then 280 ml of water was added to the mixed solution. At this time, the solid content in the whole mixed solution was 5wt%. , with a laboratory high-shear dispersing emulsifier to stir for 30 minutes at 10,000 rpm, spray in the spray drying test device (QP-3X model, produced by Beijing Beihuayan Petrochemical Design Institute), and...

Embodiment 2

[0030] Mix 1,000 grams of silicon dioxide powder (Shenyang Chemical Co., Ltd., particle size range of 10 to 30 nm) with 19,000 milliliters of water at a concentration of 5 wt%, and disperse through a high-shear disperser (same as Example 1) to obtain a stable suspension liquid. Get prepared attapulgite suspension (same as Example 1) 840 grams and 560 grams of silicon dioxide suspension obtained through dispersion and mix by the 60 / 40 proportioning of respective dry weight, carry out by the same condition as Example 1 After shear dispersion and spray drying, the 3# composite powder with attapulgite and silica ratio of 60 / 40 was obtained.

Embodiment 3

[0032] 700 grams of prepared attapulgite suspension (same as Example 1) and 140 grams of silica sol (same as Example 1) are mixed according to the 50 / 50 proportioning ratio of their respective dry weights, and 560 milliliters of water are added to adjust the mixed liquid-solid content 5 wt%, the rest of the treatment method and operating conditions are the same as in Example 1, and the 4# composite powder with the ratio of attapulgite and silicon dioxide of 50 / 50 is obtained by spray drying.

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Abstract

The invention discloses an attapulgite/silicon dioxide composite powder and a preparation method thereof. The composite powder comprises attapulgite and silicon dioxide in the weight ratio of 25:75-75:25. The preparation method of the composite powder comprises the following steps of: preparing the attapulgite and water into attapulgite suspension; uniformly mixing the amount of silicon dioxide suspension or silicasol and the attapulgite suspension prepared by the step a to obtain mixed solution; performing spray drying on the obtained mixed solution to obtain the attapulgite/silicon dioxide composite powder. The attapulgite/silicon dioxide composite powder prepared by the invention does not contain organic components and has high adsorption and dispersion performance; the manufacturing cost is greatly reduced; and the attapulgite/silicon dioxide composite powder is an ideal porous inorganic nano-adsorbent and is widely applied.

Description

technical field [0001] The invention relates to the field of inorganic chemistry, in particular to an attapulgite / silicon dioxide composite powder and a preparation method thereof. Background technique [0002] Attapulgite, also known as Palygorskite, is a nanoscale porous crystalline magnesium aluminum silicate, which is different from layered silicates such as montmorillonite, and its crystals are rod-like or fibrous. , with a length of 500-5000nm and a diameter of 10-20nm, there are regular and fixed-sized one-dimensional channels inside its crystal structure, and its cross-sectional area is Gas molecules, water molecules and polar organic molecules of a certain size can enter the pores. The existence of such micropores similar to zeolite channels endows attapulgite with larger specific surface area and adsorption performance. At the same time, because the individual crystals are in the shape of tiny rods, needles and fibers, when dispersed, the rod-shaped fibers can m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/16B01J20/30B01J32/00B01J35/10
Inventor 刘轶群苗壮乔金梁郭敏潘国元
Owner CHINA PETROLEUM & CHEM CORP
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