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Method for in-situ synthesizing silicon, magnesium, and lithium containing organic composite multilayer material

A composite material and synthesis method technology, applied in organic chemistry, chemical instruments and methods, inorganic chemistry, etc., can solve the problem of difficult introduction of neutral surfactants, difficulty in controlling the amount of organic matter exchange, and no organic modification of hectorite and other problems, to achieve the effect of intact sheet structure, reduce production cost, and reduce operation time

Inactive Publication Date: 2010-12-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Zhou Chunhui et al. [Zhou Chunhui, Du Zexue, Li Xiaonian, Lu Chunshan, Ge Zhonghua, "Research on the evolution and influence of hectorite structure in hydrothermal system", Journal of Inorganic Chemistry, 2005, 21(9): 1327-1332] Lithium fluoride, magnesium chloride, water glass, and ammonia water were used as the main raw materials, and layered hectorite was synthesized by a hydrothermal synthesis system, but no organic modification of hectorite was involved.
[0005] In summary, the prior art methods for preparing artificially silicon-, magnesium-, and lithium-containing organic layered composites usually utilize natural or artificially synthesized silicon, magnesium, and lithium layered composites in advance, and then add organic surfactants to carry out the process. Exchange modification is a two-step synthesis process. The exchange amount of organic matter is difficult to control and the stability of organic matter in composite materials is poor and easy to be lost.
Moreover, the existing ion exchange modification method is difficult to introduce neutral surfactants into the layered structure of silicon, magnesium, lithium materials

Method used

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  • Method for in-situ synthesizing silicon, magnesium, and lithium containing organic composite multilayer material
  • Method for in-situ synthesizing silicon, magnesium, and lithium containing organic composite multilayer material

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Weigh 0.134 g of lithium fluoride, add 75 g of water and stir well to dissolve it. Take 4.066 grams of magnesium chloride in a beaker, add 30 grams of water and stir to dissolve, measure about 20 grams of 2mol / L ammonia water and add it to the magnesium chloride solution, fully react to obtain Mg(OH) 2 Precipitate, and then centrifuge and wash the precipitate, then move it into the lithium salt solution, and stir to form a mixed slurry. Weigh 12.36 grams of water glass into a beaker, add about 4 grams of 3mol / L hydrochloric acid, stir to obtain a solid, then add 40 grams of water, continue stirring to refine the large particles, and obtain a white solid after centrifugation. Add the white solid to the mixed slurry and stir evenly, transfer it into a PTFE-lined stainless steel hydrothermal crystallization kettle, crystallize at 120°C for 3 days, centrifuge, wash, and dry to obtain the product.

Embodiment 2

[0035] Weigh 0.130 g of lithium fluoride, add 75 g of water and stir well to dissolve it. Take 4.058 grams of magnesium chloride in a beaker, add 30 grams of water and stir to dissolve, measure about 20 grams of 2mol / L ammonia water and add it to the magnesium chloride solution, fully react to obtain Mg(OH) 2 Precipitate, and then centrifuge and wash the precipitate, then move it into the lithium salt solution, and stir to form a mixed slurry. Weigh 12.36 grams of water glass into a beaker, add about 4 grams of 3mol / L hydrochloric acid, stir to obtain a solid, then add 40 grams of water, continue stirring to refine the large particles, and obtain a white solid after centrifugation. Weigh 0.318 grams of cetyltrimethylammonium bromide, add 30 grams of water and stir to form a solution, add the cetyltrimethylammonium bromide solution and the white solid into the mixed slurry and stir evenly, then transfer to the polytetrafluoroethylene Lined with a stainless steel hydrothermal c...

Embodiment 3

[0037] Weigh 0.131 g of lithium fluoride, add 75 g of water and stir well to dissolve it. Take 4.070 grams of magnesium chloride in a beaker, add 30 grams of water and stir to dissolve, measure about 20 grams of 2mol / L ammonia water and add it to the magnesium chloride solution, fully react to obtain Mg(OH) 2 Precipitate, and then centrifuge and wash the precipitate, then move it into the lithium salt solution, and stir to form a mixed slurry. Weigh 12.37 grams of water glass into a beaker, add about 4 grams of 3mol / L hydrochloric acid, stir to obtain a solid, then add 40 grams of water, continue stirring to refine the large particles, and obtain a white solid after centrifugation. Weigh 7.16 grams of cetyltrimethylammonium bromide, add 100 grams of water and stir to form a solution, add the cetyltrimethylammonium bromide solution and the white solid into the mixed slurry and stir evenly, then transfer to polytetrafluoroethylene Lined with a stainless steel hydrothermal cryst...

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Abstract

The invention discloses a method for in-situ synthesis of an organic laminar composite material containing silicon, magnesium and lithium, which comprises the following steps that: water soluble lithium salt or lithium hydroxide, a magnesium hydroxide colloid, silica gel, an organic surfactant, and solvent water are taken as raw materials to obtain the organic laminar composite material containing the silicon, the magnesium and the lithium through the in-situ hydro-thermal synthesis; the magnesium hydroxide colloid is prepared by taking water soluble magnesium salt as a raw material and alkali as a precipitation agent by a solution precipitation method; the silica gel is obtained by water glass through acid treatment; and the organic surfactant is one or a mixture of two of an organic cation surfactant and a neutral organic surfactant. The synthetic method has simple and quick operation and widens application range due to the adoption of one-step synthesis. The prepared organic laminar composite material containing the silicon, the magnesium and the lithium has the advantages of good crystallization, larger interlayer spacing, intact sheet structure and close packing, and can be used in the field of the application of the prior organic laminar material.

Description

(1) Technical field [0001] The invention relates to a method for in-situ synthesis of an organic layered composite material containing silicon, magnesium and lithium. (2) Background technology [0002] Layered composite materials can also adsorb or exchange with organic and neutral molecules in the solution because of the organic or inorganic species contained between their layers. Heavy metal ions are adsorbed between the layers and become active adsorption substances to directly adsorb toxic substances, and can also be widely used in the fields of catalysis and storage materials. The use of layered composite materials and the design and synthesis of new composite materials have very broad application prospects. [0003] Natural montmorillonite is a typical layered material, and it becomes an organic cationic layered material after being modified by an organic quaternary ammonium salt, and this preparation method is usually carried out by neutral or cationic surfactants. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/00C01D15/00C01B33/00C07C211/63C07C211/07
Inventor 周春晖范能全童东绅
Owner ZHEJIANG UNIV OF TECH