Method for preparing lithium magnesium silicate montmorillonite using salt lake brine water

A technology of magnesium lithium silicate, salt lake brine, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve problems such as chemical composition imbalance, endanger the development of salt lake resources, etc. The effect of high added value of products and simple process

Inactive Publication Date: 2006-06-21
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the long run, the chemical composition of the original brine of the salt lake will inevitably be out of balance, which will eventually lead to the dynamic adjustment of the development process of the salt lake, seriously endangering the further development of the salt lake resources

Method used

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  • Method for preparing lithium magnesium silicate montmorillonite using salt lake brine water
  • Method for preparing lithium magnesium silicate montmorillonite using salt lake brine water
  • Method for preparing lithium magnesium silicate montmorillonite using salt lake brine water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get 1000g concentrated brine, its chemical composition weight percent is: LiCl 2.50%; NaCl 1.42%; KCl 0.18%; MgCl 2 29.13%; MgSO 4 3.75%; B 2 o 3 1.66%; H 2 O 61.37%; 2234.78g Na 2 SiO 3 9H 2 O was added to the concentrated brine of the salt lake, stirred to make it fully mixed, and NaOH solution was added to adjust the pH value of the mixture to 11, and 394.02g MgCl 2 ·6H 2 OH adjusts the ratio of the amount of magnesium, lithium and silicate in the mixed solution to Mg 2+ : Li + : Si 4+ =2.7:0.3:4; then the mixed solution was placed in a high-pressure reactor, reacted at 250°C for 6 hours, cooled, the gel-like product was taken out, washed by centrifugation, dried, and ground into a powder. The white powder sample obtained by XRD test is magnesium silicate hectorite clay. Its composition is:

[0027] Na 2 O 3.23%; Li 2 O 1.17%; MgO 28.39%; SiO 2 62.71%; H 2 O 4.70%. The recovery rate was 92%.

Embodiment 2

[0029] Get 1000g concentrated brine, its chemical composition weight percent is: LiCl 1.20%; NaCl 1.82%; KCl 0.28%; MgCl 2 28.60%; MgSO 4 3.25%; B 2 o 3 1.76%; H 2 O 63.09%; 1214.07g liquid potassium sodium silicate (aK 2 O·bNa 2 O·cSiO 2 ·nH 2 O, where K 2 O: 5.5%; Na 2 O: 5.5%; SiO 2 24.0%) was added into the concentrated brine, stirred to make it fully mixed, added NaOH solution to adjust the pH value of the mixed solution to 12, and used 9.18g LiCl 2 2H 2 O adjusts the ratio of the amount of magnesium, lithium and silicate in the mixed solution to be Mg 2+ : Li + : Si 4+ =2.7:0.3:4; then the mixed solution was placed in a high-pressure reactor, reacted at 200°C for 10 hours, cooled, and the gel-like product was taken out, washed by centrifugation, dried, and ground into a powder. The white powder sample obtained by XRD test is magnesium silicate hectorite clay. Its composition is: Na 2 O 2.96%; Li 2 O 1.18%; MgO 28.60%; SiO 2 62.98%; H 2 O 4.28%. Th...

Embodiment 3

[0031] Get 1000g concentrated brine, its chemical composition weight percent is: LiCl 2.50%; NaCl 1.42%; KCl 0.18%; MgCl 2 29.13%; MgSO 4 3.75%; B 2 o 3 1.66%; H2 O 61.37%. 1630.10g liquid potassium silicate (K 2 SiO 3 ·nH 2 O) add in the concentrated brine, stir to make it fully mix, add NaOH solution to adjust the pH value of the mixed solution to 14, and use MgO to adjust the ratio of the amount of magnesium, lithium and silicate in the mixed solution to be Mg 2+ : Li + : Si 4+ =2.7:0.3:4; then the mixed solution was placed in a high-pressure reactor, reacted at 150° C. for 14 hours, cooled, and the gel product was taken out, washed by centrifugation, dried, and ground into a powder. The white powder sample obtained by XRD test is magnesium silicate hectorite clay. Its composition is: Na 2 O 1.03%; Li 2 O 1.16%; MgO 28.72%; SiO 2 63.07%; H 2 O 6.02%. The recovery rate was 89%.

[0032] Using concentrated salt lake brine as raw material, adjust the ratio o...

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Abstract

The invention provides a method for synthesizing magnesium metasilicate swinefordite by directly using salt lake saline water, which comprises: adding the soluble metasilicate into the salt lake condensed saline water, adjusting the mixing solution to make it not less than 11 with queous alkali, and adjusting the stoichiometric ratio of the magnesium, lithium and metasilicate in the mixing solution by using primary magnesium product and lithium product, then putting the mixing solution in the pressure reacting pan to react under high pressuer and high water temperature, rotary scrubbing or sucting after cooling, drying and getting the magnesium metasilicate lithium powder. The invention employs the abundant lithium, magnesium resource in the salt lake to synthesize magnesium metasilicate lithium, without the separation of magnesium and lithium, which passes the technological problem of separating magnesium and lithium, and the invention is characterized by simple process, short producing period, low cost, high product added value and suitable for industrialization; the raw material is nontoxic and harmless, there is no pollution during the whole process and no side product; the invention provides a new idea and way for comprehensive development and use of the salt lake resource.

Description

technical field [0001] The present invention relates to a preparation method of magnesium lithium silicate, a novel material with wide industrial application, in particular to a method of preparing magnesium silicate hectorite clay by hydrothermal method using salt lake brine as raw material. Background technique [0002] Natural magnesium lithium silicate is a high-purity nano-mineral material, the mineral name is hectorite (Hectorite), and the structural formula is Na 0.3 (Mg, Li) 3 Si 4 o 10 (F,OH) 2 , are rare minerals. [0003] Lithium magnesium silicate has excellent colloidal dispersion, stability, thixotropy and suspension, and has a wide range of industrial applications, especially for various coatings, cosmetics, detergents, paints, daily chemicals, lithium batteries, printing and dyeing aids Agents, lubricants, antistatic agents, porcelain sleeves for enamel products, aerosols, viscosity regulators, thickeners, dispersants, latex stabilizers, wine purifiers, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20
Inventor 姚颖贾永忠孙进贺景燕李武
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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