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Method of deeply modifying attapulgite to prepare nano carrier material

A technology of attapulgite and nano-carrier, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as waste water pollution, expand application fields, promote surface properties and texture properties, and maximize The effect of using

Active Publication Date: 2017-11-03
盱眙凹土能源环保材料研发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to: provide a kind of efficient, green, thorough attapulgite depth modification and prepare the method for nano-carrier material, improve the efficiency of attapulgite modification, promote the improvement of attapulgite texture characteristic, avoid one-time modification Sexuality and excessive acid concentration lead to problems such as wastewater pollution

Method used

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  • Method of deeply modifying attapulgite to prepare nano carrier material
  • Method of deeply modifying attapulgite to prepare nano carrier material
  • Method of deeply modifying attapulgite to prepare nano carrier material

Examples

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Effect test

Embodiment 1

[0019] Example 1: According to the following steps, attapulgite is deeply modified to prepare nano-carrier materials

[0020] (1) 100g of attapulgite raw ore was crushed and sieved until the particle size was 60 mesh, added to 800g of water at 50°C and stirred for 2 hours, cooled and settled, and the middle layer slurry was filtered and dried to obtain 76g of attapulgite primary product;

[0021] (2) Grind and sieve the above 76g attapulgite primary product until the particle size is 100 mesh, add it to 456g, 80°C, 12.0wt% sulfuric acid aqueous solution and stir for 2.5 hours, filter to obtain 361g filtrate, wash the solids with water, Dried to obtain 42g acid-modified attapulgite, and collected pickling liquid 720g altogether simultaneously;

[0022] (3) Grind and sieve the above 42g of acid-modified attapulgite until the particle size is 80 mesh, put it into a three-necked flask and completely replace the air with nitrogen, prepare 63mL of 2mol / L sodium borohydride aqueous s...

Embodiment 2

[0028] Example 2: According to the following steps, attapulgite is deeply modified to prepare nano-carrier materials

[0029] (1) 80g of attapulgite raw ore was crushed and sieved until the particle size was 200 mesh, added to 400g of water at 80°C and stirred for 1 hour, cooled and settled, and the middle layer slurry was filtered and dried to obtain 65g of attapulgite primary product;

[0030] (2) Crush and sieve the above 65g attapulgite primary product until the particle size is 60 mesh, add it to 325g, 60°C, 6.0wt% nitric acid aqueous solution and stir for 2 hours, filter to obtain 260g filtrate, wash the solids with water, Dried to obtain 48g acid-modified attapulgite, while collecting pickling liquid 640g altogether;

[0031] (3) Grind and sieve the above 48g of acid-modified attapulgite until the particle size is 100 mesh, add it into a three-necked flask and completely replace the air with nitrogen, prepare 96mL of 0.5mol / L sodium metaaluminate aqueous solution, In a...

Embodiment 3

[0037] Example 3: According to the following steps, attapulgite is deeply modified to prepare nano-carrier materials

[0038] (1) 50g of attapulgite raw ore was crushed and sieved until the particle size was 100 mesh, added to 200g of water at 75°C and stirred for 3 hours, cooled and settled, and the middle layer slurry was filtered and dried to obtain 32g of attapulgite primary product;

[0039] (2) Crush and sieve the above 32g attapulgite primary product until the particle size is 80 mesh, add it to 96g, 50°C, 15.0wt% hydrochloric acid aqueous solution and stir for 1 hour, filter to obtain 51g of filtrate, wash the solids with water, Dry to obtain 17g acid-modified attapulgite, and collect the pickling liquid 660g altogether simultaneously;

[0040] (3) Crush and sieve the above 17g of acid-modified attapulgite until the particle size is 60 mesh, add it to a three-necked flask and completely replace the air with nitrogen, and prepare a mixture of 1.0mol / L potassium borohydr...

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Abstract

The invention discloses a method of deeply modifying attapulgite to prepare a nano carrier material; the method comprises the steps of crushing attapulgite, screening, rinsing with water, separating by settling, and drying to obtain primary attapulgite; subjecting the primary attapulgite to primary acid modification, filtering and separating, washing, and drying to obtain acid-modified attapulgite; subjecting the acid-modified attapulgite to secondary alkali modification in an ice-water bath under the protection of nitrogen, filtering, separating, washing, and drying to obtain deeply-modified attapulgite; cyclically modifying via filtrates obtained by the primary acid modification and secondary alkali modification and part of a washing liquor which fresh inorganic acids and alkaline salts are added, and neutralizing the rest washing liquor. Attapulgite is deeply modified via chemical redox at low temperature, further improvements on surface characteristics and texture performance of the attapulgite are promoted, modification wastewater is effectively treated, and the method is an efficient green thorough method of modifying attapulgite.

Description

technical field [0001] The invention relates to a method for preparing nano-carrier materials through deep modification of attapulgite, which belongs to the field of deep processing of non-metallic ores. Background technique [0002] Attapulgite clay (abbreviated as attapulgite, ATP) is a magnesium-rich aluminum silicate clay mineral, cheap and abundant, with a unique layer chain structure. Attapulgite is widely used in chemical industry, light industry, environmental protection, textile, building materials, pharmaceutical and other fields because of its special fiber structure, excellent adsorption and colloidal properties. In addition, inside the attapulgite lattice, the basic structural units that make up attapulgite are staggered, forming nano-sized intracrystalline pores that have a larger specific surface area and more adsorption-catalysis active sites. In the attapulgite crystal structure, some cations at the octahedral position are directly exposed in the intracryst...

Claims

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Application Information

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IPC IPC(8): C01B33/40
Inventor 陈新德郭海军张海荣王璨熊莲彭芬陈雪芳黎海龙
Owner 盱眙凹土能源环保材料研发中心
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