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Preparation method of attapulgite loaded nano iron

A technology of attapulgite and nano-iron, applied in chemical instruments and methods, silicates, inorganic chemistry, etc., can solve the problems of uneconomical acidification modified attapulgite, increased pickling steps, and impact on environmental equipment, etc. Achieve the effects of avoiding pickling wastewater discharge, improving environmental protection efficiency, and improving adsorption performance

Active Publication Date: 2014-07-02
SUZHOU YUXI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method has many reaction steps, and the use of acidified modified attapulgite is not economical in industrial production, and it also increases the steps of pickling, which produces three wastes, affects the environment and corrodes equipment, and at the same time, the reducing agent KBH used in this method 4 , NaBH 4 , N 2 h 4 , toxic and prone to deflagration in water, humidity, open flames and other environments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take by weighing 100 grams of attapulgite, grind and pulverize, sieve to below 2 mm, measure 1 kg of deionized water, mix attapulgite with deionized water, stir evenly, let stand, filter, and dry to obtain the initial attapulgite. finished product.

[0027] After raising the prepared attapulgite from room temperature to 250 °C, pass N 2 Make the water vapor contact with the attapulgite; further raise the temperature to 300°C and react for 1 hour. After the reaction, start to cool down and stop adding water vapor. After the temperature drops to room temperature, take out the attapulgite.

[0028] Mix the obtained attapulgite with 300 grams of 1mol / L ferric chloride solution, add 0.5 grams of sodium hexametaphosphate, stir for 1 hour, filter, vacuum dry, and then roast, in an inert gas N 2 Under protective conditions, raise the temperature to 300°C, keep it warm for 1 hour, and then lower it to room temperature.

[0029] The water vapor is passed through the micropump, ...

Embodiment 2

[0031] Weigh 100 grams of attapulgite and grind, sieve to below 2mm, measure 2 kg of deionized water, mix attapulgite with deionized water, stir evenly, let stand, filter, and dry to obtain the initial attapulgite. finished product.

[0032] After raising the prepared attapulgite from room temperature to 250 °C, pass N 2 Make the water vapor contact with the attapulgite; further raise the temperature to 350°C, and react for 3 hours. After the reaction, start to lower the temperature and stop adding water vapor. After the temperature drops to room temperature, take out the attapulgite.

[0033] Mix the obtained attapulgite with 500 grams of 1mol / L iron nitrate solution, add 5 grams of sodium hexametaphosphate, stir for 2 hours, filter, vacuum dry, and then roast, in an inert gas N 2 Under protective conditions, raise the temperature to 400°C, keep it warm for 2 hours, and then lower it to room temperature.

[0034] In this embodiment, the total reaction time is 3 hours, and t...

Embodiment 3

[0036] Weigh 100 grams of attapulgite to grind and grind, sieve to below 2mm, measure 1.5 kg of deionized water, mix attapulgite with deionized water, stir evenly, leave standstill, filter, and dry to obtain the initial attapulgite. finished product.

[0037] After raising the prepared attapulgite from room temperature to 250 °C, pass N 2 Make water vapor contact with attapulgite; further raise the temperature to 320°C and react for 2 hours. After the reaction, start to cool down and stop adding water vapor. After the temperature drops to room temperature, take out attapulgite.

[0038] Mix the obtained attapulgite with 400 grams of 1mol / L iron sulfate solution, add 2 grams of sodium hexametaphosphate, stir for 1 hour, filter, vacuum dry, and then roast, in an inert gas N 2 Under protective conditions, raise the temperature to 380°C, keep it warm for 1.5 hours, and then lower it to room temperature.

[0039] In this embodiment, the total reaction time is 2.5 hours, and the t...

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Abstract

The invention belongs to the technical field of preparation of functional materials, and particularly relates to a preparation method of attapulgite loaded nano iron. The method particularly comprises the following steps: (1) grinding, crushing and screening attapulgite to the size below 2mm, then mixing attapulgite and deionized water, stirring, standing, filtering and drying; (2) activating attapulgite by vapor; and (3) loading nano iron on attapulgite. The preparation method of attapulgite loaded nano iron, which is provided by the invention, has the technical advantages that attapulgite is activated by adopting vapor, and pickling waste water is not exhausted in the treatment process, so that the environment protection efficiency of the production process is improved; the vapor activation treatment at proper temperature can improve the surface performance of attapulgite, so that the application field of attapulgite is widened further; nano iron is loaded on attapulgite by adopting a roasting method, and compared with a liquid phase reduction method, the preparation method according to the invention has the advantages that the reaction steps are less, and three wastes (waste gas, waste water and industrial residue) are less; nano iron loaded attapulgite as a functional modifying agent is applied to foam ceramic materials, and the adsorption performance of the foam ceramic materials can be improved.

Description

Technical field [0001] The present invention involves a preparation method of a bumpy soil load nano -iron, which is the field of functional materials preparation. Background technique [0002] Due to the advantages of small scale, large surface effects, and high response activity, nano iron can quickly and effectively degrade environmental organic pollutants or restore heavy metal pollution in a fixed environment. It is a very good environmental function. [0003] Because the particle size of nano iron is 50 to 200Nm, it is larger than the surface area, which can easily cause particle gathering reactions. It is difficult to maintain a stable suspension state. It is not conducive to the full contact reaction with environmental pollutants.One of the key factors in actual engineering. [0004] Therefore, in order to improve the reaction activity of nano -iron, enhance its stability, and prevent particles from reunion, high -activity nano iron is needed to load on the carrier.Due to...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/16
Inventor 张宇左士祥
Owner SUZHOU YUXI NEW MATERIAL TECH
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