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Simple high-performance modification process for attapulgite clay

A technology of attapulgite clay and attapulgite, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of treatment efficiency and three wastes treatment, such as large and burdensome, achieve high productivity, promote disintegration, and process The effect of simple and easy process

Inactive Publication Date: 2009-01-07
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This modification method is difficult to fully spread the modifier on the inner surface of the various pore cavities of the attapulgite, and the crystal bundles of the attapulgite are basically not dissociated; another method is to use ultrasound or long-term mechanical stirring to Attapulgite is dispersed in a large amount of dispersion medium, and then modified by heating and refluxing for a long time. This method is relatively sufficient, but it has great disadvantages in industrialization, such as treatment efficiency and three wastes treatment. is a big burden

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1- 16

[0013] Example 1-hexadecyltrimethylammonium chloride modified attapulgite

[0014] Modify the attapulgite according to the following steps:

[0015] 1. Soak the attapulgite in clean water for 24 hours;

[0016] 2. Take the attapulgite soaked in step 1 and extrude it into thin slices through an extruder, with a thickness of 1 mm; after extrusion, the attapulgite and cetyltrimethylammonium chloride aqueous solution are mixed in a ratio of 1:1 by weight , the amount of cetyltrimethylammonium chloride is 1.0% of attapulgite, diluted, put into the freezer for quick freezing for 2 hours, the temperature of the freezer is -18°C, after freezing, take it out and bake it in the oven for 1 hour, the oven temperature is 75°C;

[0017] 3. Mix the attapulgite obtained in step 2 with clear water in a ratio of 1:1 by weight, and extrude it into a thin sheet with a thickness of 1 mm. The proportion is fully mixed, diluted, put into the freezer for quick freezing for 2 hours, the temperature ...

example 2-

[0019] Example 2-chitosan modified attapulgite

[0020] Modify the attapulgite according to the following steps:

[0021] 1. Soak the attapulgite in clean water for 24 hours;

[0022] 2, get the attapulgite soaked in step 1 and extrude into thin slices through an extruder, with a thickness of 1 mm; after extrusion, attapulgite and chitosan-acetic acid solution are mixed in a ratio of 1:1 by weight, and the chitosan-acetic acid solution pH = 4, the amount of chitosan is 1.5 of attapulgite, diluted, put into the freezer for quick freezing for 2 hours, the temperature of the freezer is -18°C, after freezing, take it out and bake it in the oven for 1 hour, the oven temperature is 80°C;

[0023] 3. Mix the attapulgite obtained in step 2 with clear water in a ratio of 1:1 by weight, and put it into an extruder to extrude into thin slices with a thickness of 1 mm. Mix, dilute, put into the cold storage for 2 hours, and the temperature of the cold storage is -18°C. After freezing, t...

example 3

[0025] Example 3 - modified starch modified attapulgite

[0026] Modify the attapulgite according to the following steps:

[0027] 1. Soak the attapulgite in clean water for 24 hours;

[0028] 2. Get the attapulgite soaked in step 1 and extrude it into thin slices through an extruder. 3%, dilute, put into the cold storage for 2 hours, the temperature of the cold storage is -18 ℃, after freezing, take it out and bake it in the oven for 1 hour, the oven temperature is 85 ℃;

[0029] 3. Mix the attapulgite obtained in step 2 with clear water in a ratio of 1:1 by weight, and put it into an extruder to extrude into thin slices with a thickness of 1 mm. Mix, dilute, put into the cold storage for 2 hours to freeze quickly, the temperature of the cold storage is about -18°C, after freezing, take it out and bake it in the oven until the water content is 3%, and the oven temperature is 85°C;

[0030] 4. The attapulgite obtained in step 3 is pulverized by a pulverizer to obtain modifi...

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Abstract

The invention discloses a simple and efficient attapulgite clay modification method. The method comprises the steps of dipping the attapulgite clay; extruding the dipped attapulgite clay for twice; adding a modifying agent solution; refrigerating; performing heat processing; and pulverizing to obtain the modified attapulgite clay. The method is a semidry process. The crystal bundle separation of the attapulgite clay and the modification procedure are integrated as one procedure; the modification is complete and no three-waste is produced; and the processing efficiency is high.

Description

technical field [0001] The invention belongs to the field of deep processing of non-metallic ores, and in particular relates to a simple and efficient attapulgite clay modification method. Background technique [0002] Attapulgite clay (hereinafter referred to as attapulgite) is a magnesium-rich silicate, and its crystal structure belongs to the 2:1 layer chain clay mineral. The special structure and properties of attapulgite endow it with high application value, making it widely used in water purification, binder, pesticide carrier, molecular sieve, desiccant, adsorbent, coating, drilling mud, etc. Before its use, attapulgite mostly needs to be modified to strengthen its specific properties on the surface, and the crystal bundles formed by the rod crystal fibers in natural attapulgite minerals are very dense and firm, even if they are crushed to particles below 0.1 mm It is also difficult to disperse uniformly in the dispersion medium, thus limiting the thoroughness of att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/44
Inventor 陈静金叶玲钱运华
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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