Method for preparing composite adsorbent by utilizing low-grade attapulgite clay

A technology of attapulgite clay and attapulgite, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of inability to realize efficient comprehensive utilization of attapulgite clay mines, environmental pollution of activators, water and energy consumption, etc. , to achieve the effect of high-value utilization, easy process control, and high-efficiency adsorbent

Active Publication Date: 2015-03-04
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the purification process is complex, costly, consumes water and energy, and the activator can also cause environmental pollution
Although various physical methods (Chinese patent CN104014299A) or chemical modification methods (Chinese patent CN 102527325A;

Method used

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  • Method for preparing composite adsorbent by utilizing low-grade attapulgite clay
  • Method for preparing composite adsorbent by utilizing low-grade attapulgite clay
  • Method for preparing composite adsorbent by utilizing low-grade attapulgite clay

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1: Mix 100 g of attapulgite clay mineral powder with 10 g of potassium silicate and 10 g of magnesium chloride and ball mill, then disperse into 1000 mL of water, add 0.01 g of sodium chloroacetate, age for 2 hours, and transfer to a 1.5 L high-pressure reactor , reacted at 300 °C for 5 h, separated the solid product after natural cooling, washed with water, dried at 110 °C, and pulverized to obtain a white composite adsorbent.

Embodiment 2

[0020] Example 2: Mix 10 g of attapulgite clay mineral powder with 60 g of sodium potassium silicate and 50 g of zinc sulfate and ball mill, then disperse into 1000 mL of water, add 0.05 g of urea, age for 1 h, and transfer to a 1.5 L high-pressure reactor , reacted at 120°C for 60h, separated the solid product after natural cooling, washed with water, dried at 110°C, and pulverized to obtain a white composite adsorbent.

Embodiment 3

[0021] Example 3: Mix 50 g of attapulgite clay mineral powder with 20 g of orthosilicic acid and 15 g of calcium hydroxide, ball mill, then disperse into 1000 mL of water, add 0.25 g of dimethylformamide, age for 2 hours, transfer to 1.5 L In a high-pressure reactor, react at a temperature of 180 °C for 60 hours. After natural cooling, the solid product is separated, washed with water, dried at 110 °C, and pulverized to obtain an off-white composite adsorbent.

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Abstract

The invention discloses a method for preparing composite absorbent by utilizing low-grade attapulgite clay. The method comprises the steps of uniformly mixing attapulgite clay mineral powder containing quartz and dolomite with soluble silicate accounting for 20 to 600 percent of the weight of the attapulgite clay mineral powder and metal salt accounting for 10 to 500 percent of the weight of the attapulgite clay mineral powder or a solution containing the metal salt, then grinding the mixture, dispersing the mixture into water in a solid-liquid ratio of 1:100-1:10, adding an appropriate amount of additive, and aging for 1 to 4 hours; then transferring the mixture into a hydrothermal reaction kettle to react for 5 to 60 hours at the temperature of 120 to 300 DEG C, and then separating, washing, drying and crushing to obtain the adsorbent. According to the method, the quartz impurities and dolomite in the attapulgite clay mineral powder are converted into amorphous silicate with strong adsorption activity, and the prepared adsorbent is large in specific surface area and uniform in aperture distribution, is used for adsorbing and removing dye, heavy metal, organic molecules, radioactive elements, rare earth and mycotoxin and is wide in application prospect in the fields of biology, food, petrochemical industry, environment restoration, printing and dyeing waste water treatment and the like.

Description

technical field [0001] The invention relates to a method for preparing a composite adsorbent by using low-grade attapulgite clay, and belongs to the technical fields of deep processing, comprehensive utilization and nano-adsorbent synthesis of natural non-metallic ore. Background technique [0002] Attapulgite clay (also known as palygorskite or palygorskite) is a hydrous magnesium-aluminosilicate clay mineral with attapulgite as the main component, which has nanorod crystal morphology and abundant nanopores. Its single crystal has a diameter of 20-70nm and a length of 0.5-5 μm. It has a large specific surface area and is a cheap natural adsorbent. [0003] my country is rich in attapulgite clay resources, but overall the added value of products is low, and the utilization rate of resources is not high, which seriously restricts the development of the industry. The main reasons are: (1) Most attapulgite clay ores are not of high purity, often accompanied by miscellaneous or...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/30
CPCB01J20/12B01J20/3085B01J2220/4806
Inventor 王文波王爱勤汪琴康玉茹牟斌宗莉
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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