Method for purifying and modifying attapulgite

A technology of attapulgite and attapulgite powder, applied in chemical instruments and methods, climate sustainability, sustainable manufacturing/processing, etc., can solve the problem of destroying organic matter on the surface of attapulgite and affecting the compatibility and dispersion of alcohol-based coatings and other problems, to achieve the effect of improving environmental protection efficiency, improving enterprise economic benefits, and increasing specific surface area

Active Publication Date: 2017-06-30
盱眙三银凹土科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Liu Hailong et al. (CN1508197A) used a self-made new cationic surface modifier and attapulgite to carry out stirring modification treatment in a solution with a pH value of 6.3 at 20 ° C. Water-based, but high-speed stirring during the coating preparation process will destroy the organic matter on the surface of the attapulgite, affecting the compatibility and dispersion in alcohol-based coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0027] (1) Take 1000g of attapulgite raw ore, grind it to a particle size of 1mm, place the container containing deionized water containing an organic active agent on a constant temperature magnetic stirrer, and add the above crushed during the magnetic stirring process The attapulgite raw ore particles were stirred for 1 hour and then soaked and left to stand for 12 hours;

[0028] The mass ratio of the components of the above organic active agent is silane coupling agent 550: silane coupling agent 570: aluminate coupling agent SG-Al821: anti-sedimentation aluminate ASA: higher fatty acid sodium: sodium stearate: B Diol=1.4:1.0:0.8:0.6:0.3:0.3:0.2;

[0029] The rotation speed of the above constant temperature magnetic stirrer was set at 500rpm, and the stirring temperature was set at 100°C.

[0030] Afterwards, the solution was decanted to obtain the upper layer attapulgite suspension, and then an activated dispersant was added to the attapulgite suspension, and after 2 hour...

Embodiment 2

[0034] The activated dispersant used in Example 1 was changed to sodium hexametaphosphate and used alone, and finally 132.9 g of attapulgite powder after purification and modification were obtained, and the specific surface area measured by the BET method was 338.5 m 2 / g.

[0035] It should be noted that, in Embodiment 2, except for the above changes, other steps and processes are the same as in Embodiment 1.

Embodiment 3

[0037] The activated dispersant used in Example 2 was changed to sodium pyrophosphate, finally obtained attapulgite powder 130.1g after purification and modification, and the specific surface area measured by the BET method was 331.9m 2 / g.

[0038] It should be noted that in Embodiment 3, except for the above changes, other steps and procedures are the same as in Embodiment 2.

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Abstract

The invention discloses a method of purifying and modifying attapulgite, and the method comprises the following steps: crushing attapulgite raw ore, pouring the attapulgite raw ore into deionized water with an organic active agent comprising silane coupling agent550, silane coupling agent 570, aluminate coupling agent SG-Al821, anti-setting aluminate ASA and the like for magnetic stirring, after soaking and standing, decanting the solution to obtain an upper layer attapulgite suspension, adding the upper layer attapulgite suspension into an activated dispersion agent comprising sodium hexametaphosphate and carboxymethyl cellulose for synergistic ultrasonic hydrothermal method treatment, centrifuging, filtering and drying to obtain crude attapulgite clay powder, then transporting the crude attapulgite clay powder into a rotary drying furnace filled with inert gas argon for roasting, in the end of the roasting, cooling and standing to room temperature, and then taking the attapulgite powder out to obtain the purified and modified attapulgite powder. The method is free of conventional pickling wastewater discharge, and is energy saving and environmentally-friendly, the argon is used as a calcining medium to improve the purity of the attapulgite powder and further increase the specific surface area of the attapulgite powder, the adsorption ability is improved, and the application field is broadened.

Description

technical field [0001] The invention relates to the field of attapulgite purification and modification, in particular to a method for purification and modification of attapulgite. Background technique [0002] Attapulgite refers to a clay mineral with attapulgite as the main component. Attapulgite is a crystalline hydrated magnesium aluminum silicate mineral with unique layer chain structure characteristics and nanoscale pores. The microscopic structure of the channel has the characteristics of a large specific surface area and a well-developed mesoporous material. It is an ideal structural material. Because of its special fiber structure, excellent adsorption and decolorization performance, it is widely used in chemical industry, light industry, Textile, building materials, environmental protection and pharmaceuticals and other fields. Under normal circumstances, attapulgite, as a powder material, is difficult to exist in the state of dispersed independent rod crystals, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
CPCC01B33/40C01P2006/12Y02P20/10
Inventor 叶家珍
Owner 盱眙三银凹土科技有限公司
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