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Ball milling method for preparing organic vermiculite with large layer distance

A technology of interlayer spacing and ball milling, applied in inorganic chemistry, chemical instruments and methods, non-metallic elements, etc., can solve problems such as unfavorable macromolecular chain insertion, large interlayer force between inorganic sheets, and large interlayer charge density. , to achieve the effect of improving the internal structure, complete morphology, and large interlayer spacing

Inactive Publication Date: 2010-10-06
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Because the interlayer charge density of vermiculite is quite large (0.6-0.9), the extremely high interlayer Coulomb force makes the interlayer force of inorganic matter too large, which is not conducive to the insertion of macromolecular chains, and it is difficult to exchange with organic cations. There are fewer reports on organic vermiculite with large interlayer spacing

Method used

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  • Ball milling method for preparing organic vermiculite with large layer distance
  • Ball milling method for preparing organic vermiculite with large layer distance
  • Ball milling method for preparing organic vermiculite with large layer distance

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] a, Xinjiang Yuli vermiculite was cleaned with deionized water and dried for 48 hours;

[0034] B, vermiculite is pulverized with universal pulverizer, crosses 325 mesh sieves, obtains powder;

[0035]c. Prepare a solution containing 1.0 mol / L of sodium chloride and 0.25 mol / L of hydrochloric acid, and disperse the vermiculite powder in step b in the solution by stirring to form a slurry containing 15% vermiculite mass fraction, and then ultrasonically disperse, The reaction temperature is 50°C, and the reaction time is 48 hours;

[0036] d. After the reaction is over, wash with deionized water and vacuum filter until the solution is deionized with 0.1mol / L AgNO 3 Detect that there is no Cl in the filtrate - Until it exists, a solid sample is obtained;

[0037] e. Dry the solid sample at a temperature of 70° C. in a blast drying oven for 24 hours, grind and pass through a 200-mesh sieve to obtain sodium vermiculite with a cation exchange capacity of 92.55 mmol / 100 g; ...

Embodiment 2

[0041] a, Xinjiang Yuli vermiculite was cleaned with deionized water and dried for 48 hours;

[0042] B, vermiculite is pulverized with universal pulverizer, crosses 325 mesh sieves, obtains powder;

[0043] c. Prepare a solution containing 1.0 mol / L of sodium chloride and 0.25 mol / L of hydrochloric acid, and disperse the vermiculite powder in step b in the solution by stirring to form a slurry containing 15% vermiculite mass fraction, and then ultrasonically disperse, The reaction temperature is 60°C, and the reaction time is 36 hours;

[0044] d. After the reaction is over, wash with deionized water and vacuum filter until the solution is deionized with 0.1mol / L AgNO 3 Detect that there is no Cl in the filtrate - Until it exists, a solid sample is obtained;

[0045] e. Dry the solid sample at a temperature of 70°C in a blast drying oven for 24 hours, grind it, and pass it through a 200-mesh sieve to obtain sodium vermiculite with a cation exchange capacity of 96.25mm / 100g...

Embodiment 3

[0049] a, Xinjiang Yuli vermiculite was cleaned with deionized water and dried for 48 hours;

[0050] B, vermiculite is pulverized with universal pulverizer, crosses 325 mesh sieves, obtains powder;

[0051] c. Prepare a solution containing 1.0 mol / L of sodium chloride and 0.25 mol / L of hydrochloric acid, and disperse the vermiculite powder in step b in the solution by stirring to form a slurry containing 15% vermiculite mass fraction, and then ultrasonically disperse, The reaction temperature is 70°C, and the reaction time is 24 hours;

[0052] d. After the reaction is over, wash with deionized water and vacuum filter until the solution is deionized with 0.1mol / L AgNO 3 Detect that there is no Cl in the filtrate - Until it exists, a solid sample is obtained;

[0053] e. Dry the solid sample at a temperature of 70°C in a blast drying oven for 24 hours, grind it, and pass through a 200-mesh sieve to obtain sodium vermiculite with a cation exchange capacity of 94.38mm / 100g; ...

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Abstract

The invention relates to a ball milling method for preparing organic vermiculite with large layer distance. The method comprises the following steps of: performing cooperative processing on vermiculite from Yuli County in Xinjiang Province serving as a raw material by using sodium chloride and hydrochloric acid to prepare sodium-modified vermiculite of which the cation exchange capacity and the homogeneity are high; and driving positive ions of ammonium salt to enter an interlayer by using mechanical energy produced by ball milling so as to perform a cation exchange reaction by taking cetyl trimethyl ammonium bromide as an intercalator to prepare the organic vermiculite with the large layer distance, wherein the layer distance of the organic vermiculite is between 4.936 and 5.243 nanometers; and organic vermiculite powder has high bulk density. The organic vermiculite has good application prospect when used as a catalyst carrier and an efficient organism adsorbent. The ball milling method related by the invention has universal applicability to other alkyl ammonium salt modified vermiculite. Simultaneously, the preparation method has high consistency and repeatability.

Description

technical field [0001] The invention relates to a method for preparing organic vermiculite with large layer spacing by ball milling method Background technique [0002] Vermiculite minerals are one of the non-metallic minerals with potential advantages in my country. Xinjiang Yuli Vermiculite Mine is the largest vermiculite mine in my country, and its reserves account for about 90% of the country's total. However, more than 90% of the vermiculite annual output in Xinjiang is exported abroad in the form of raw materials, and most of the remaining 10% are also sold to the inland. There are only a small amount of products that have been simply extruded in Xinjiang, and they are generally still in the raw material export area. situation. In order to change this situation, it is necessary to increase investment in the deep processing and high-value utilization of vermiculite, which will transform the resource advantages of Xinjiang vermiculite into technological advantages, indu...

Claims

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Application Information

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IPC IPC(8): C01B33/44
Inventor 陈朝阳王兰范艳伟王军华闫世友
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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