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Low-temperature hydro-thermal synthesis method for high-viscosity and high-transparency aluminium-magnesium silicate

A magnesium aluminum silicate, high light transmittance technology, applied in the direction of silicon compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the poor performance of light transmittance, thixotropy and viscosity, and the influence of magnesium aluminum silicate on performance Poor, poor application quality and other problems, to achieve the effect of high thixotropy, stable and uniform batches, and high product purity

Inactive Publication Date: 2018-08-24
JIANGSU HEMINGS NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) The performance of magnesium aluminum silicate produced from natural bentonite ore through purification and modification processes is very poor. very bad
Even the best high-purity U.S. Wyoming sodium bentonite has poor application quality
[0006] (3) At present, several foreign clay chemical giants such as Elementis Specialties in the United States, ACMOL in the United States, and Süd-Chemie AG in Germany prepare magnesium aluminum silicate through high-temperature hydrothermal synthesis. However, their production processes are complicated and the hydrothermal temperature is high, resulting in not only High energy consumption and high security risks

Method used

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  • Low-temperature hydro-thermal synthesis method for high-viscosity and high-transparency aluminium-magnesium silicate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A magnesium aluminum silicate with high viscosity and high light transmittance is prepared from the following raw material components in parts by mass according to the following steps:

[0026] (1) First mix 0.5 parts of sodium fluoride and 5 parts of Ce(NO 3 ) 3 Add to 500 parts of pure water and stir well, then add 100 parts of aluminum chloride;

[0027] (2) Next, add 1 part of zinc chloride and 10 parts of magnesium chloride to 500 parts of pure water and stir well, then add to the solution in step (1); then continue to add 50 parts of sodium hydroxide;

[0028] (3) Heat the solution in step (2) to 60°C, then slowly add 100 parts of water glass (modulus n=3.1) dropwise, and control the dropping time to 30 minutes; after the dropping is completed, continue to keep stirring for 2 hours;

[0029] (4) Finally, the solution in step (3) was filtered and fully washed, and then fully dried at 65°C to obtain magnesium aluminum silicate A.

Embodiment 2

[0031] A magnesium aluminum silicate with high viscosity and high light transmittance is prepared from the following raw material components in parts by mass according to the following steps:

[0032] (1) First, 0.5 parts of sodium fluoride, 1 part of lithium fluoride, 5 parts of Ce 2 (SO4 ) 3 , 5 copies of Dy(NO 3 ) 3 Add to 500 parts of pure water and stir well, then add 100 parts of aluminum sulfate and 100 parts of aluminum nitrate;

[0033] (2) Next, add 2 parts of zinc sulfate, 3 parts of zinc nitrate, 10 parts of magnesium sulfate, and 10 parts of magnesium nitrate into 500 parts of pure water and stir well, then add to the solution in step (1); continue to add 50 parts Part sodium hydroxide and 50 parts sodium carbonate;

[0034] (3) Heat the solution in step (2) to 90°C, then slowly add 200 parts of water glass (modulus n=3.4) dropwise, and control the dropping time to 60 minutes; after the dropping is completed, continue to keep stirring for 4 hours;

[0035] (4...

Embodiment 3

[0037] A magnesium aluminum silicate with high viscosity and high light transmittance is prepared from the following raw material components in parts by mass according to the following steps:

[0038] (1) First, 0.3 parts of sodium fluoride, 0.3 parts of lithium fluoride, 0.3 parts of sodium fluorosilicate, 3 parts of CeCl 3 , 3 copies of Dy 2 (SO 4 ) 3 , 3 parts of Sr(NO 3 ) 2 Add to 500 parts of pure water and stir well, then add 50 parts of aluminum chloride, 50 parts of aluminum sulfate, and 50 parts of aluminum nitrate;

[0039] (2) Next, add 1 part of zinc chloride, 1 part of zinc sulfate, 1 part of zinc nitrate, 5 parts of magnesium chloride, 5 parts of magnesium sulfate, and 5 parts of magnesium nitrate into 500 parts of pure water and stir well, then add to Step (1) in the solution; Continue to add 40 parts of sodium hydroxide and 40 parts of sodium carbonate again;

[0040] (3) Heat the solution in step (2) to 70°C, then slowly add 150 parts of water glass (mod...

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Abstract

The invention discloses a low-temperature hydro-thermal synthesis method for high-viscosity and high-transparency aluminium-magnesium silicate. The low-temperature hydro-thermal synthesis method is characterized in that rare earth substances, soluble aluminum salt, soluble magnesium salt, soluble sodium salt, water glass and the like are adopted as reaction raw materials, the proportion and reaction parameters of all ions are reasonably adjusted, then hydro-thermal treatment is carried out at a low temperature, and then filtering, washing and drying are carried out so as to obtain the aluminium-magnesium silicate with high hydration speed, high transparency, high viscosity and a brand-new chemical structure. The aluminium-magnesium silicate can be widely applied to the industries of foods,drugs, cosmetics, detergents, coatings and the like.

Description

technical field [0001] The invention relates to the field of synthesis of smectite group minerals, in particular to a synthesis method of magnesium aluminum silicate with high transparency, rapid hydration and high viscosity. Background technique [0002] The classic ideal molecular structure formula of magnesium aluminum silicate is (Na) 0.33 (Al,Mg) 2 [Si 4 o 10 ](OH) 2 ·nH 2 O, it is actually the scientific name of montmorillonite; and the non-metallic mineral with montmorillonite as the main mineral component is the well-known bentonite (Bentonite). The internal structure of magnesium aluminum silicate is composed of upper and lower layers of Si-O tetrahedron sandwiching a layer of Al-O octahedron; because part of the Al in the Al-O octahedron 3+ By Mg 2+ Replacement, so the magnesium aluminum silicate structure presents a strong electron-deficiency and strong electronegativity structure; in order to make up for the charge balance, a corresponding amount of Na i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
CPCC01B33/40C01P2006/22C01P2006/60C01P2006/90
Inventor 张天志张天毅
Owner JIANGSU HEMINGS NEW MATERIALS TECH CO LTD
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