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Hydrothermal synthesis production method of magnesium lithium silicate

A hydrothermal synthesis, magnesium lithium silicate technology, applied in the direction of magnesium silicate, silicate, silicon compound, etc., can solve the problems of ecological pollution, waste of the surrounding environment, destruction, etc., and achieve the effect of low preparation cost and high purity

Inactive Publication Date: 2008-06-11
成增勋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are very few resources of lithium magnesium silicate in my country, and due to the quality of the resources, the process of mineral processing and purification will cause a large amount of waste ore, which is wasteful and causes pollution and ecological damage to the surrounding environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take LiCl·H 2 O (content is 98%) 24.18g

[0016] Take MgCl 2 ·6H 2 O (content 96%) 747.926g

[0017] Take the modulus as 3.5~3.7 containing SiO 2 1284.37g of 24.6% sodium silicate solution

[0018] That is, press Li +1 : Mg +2 :Si +4 The ion number ratio is 0.3:2.7:4

[0019] Take 500ml of water, LiCl.H 2 O 24.18g and MgCl 2 .6H 2 O 747.926g to make a solution, after fully stirring, add sodium silicate solution, while stirring for half an hour, adjust the pH value to 11 with NaOH solution. The well-stirred mixed solution was placed in a high-pressure reactor, heated to 250° C., and reacted for 7 hours. Cool, take out the gel-like product, wash, dry, and grind into powder, and the product is lithium magnesium silicate. The composition is Na 2 O (3.1%), Li 2 O(1.12%), MgO(28.4%), SiO 2 (62.0%), H 2 O (5.4%).

Embodiment 2

[0021] Take Li 2 CO 3 (content is 98%) 12.09g

[0022] Take MgCl 2 ·6H 2 O (96% content) 747.93g

[0023] Take the modulus as 3.5~3.7 containing SiO 2 1284.37g of 24.6% sodium silicate solution

[0024] Stir and mix according to the method in Example 1, and adjust the pH value to 12 with NaOH solution. The well-stirred mixed solution was placed in a high-pressure reactor, heated to 130° C., and reacted for 16 hours. Cool, take out the gel-like product, wash, dry, and grind into powder, and the product is lithium magnesium silicate. Composition of Na 2 O (2.6%), Li 2 O (1.16%), MgO (27.9%), SiO 2 (63.1%), H 2 O (4.8%).

Embodiment 3

[0026] Get LiCl (content is 98%) 24.18g

[0027] Get MgO (content is 98%) 217.73g

[0028] Take the modulus as 3.5~3.7SiO 2 1284.37g of sodium silicate solution with a content of 24.6%

[0029] Take 500ml of water, mix and stir LiCl and MgO, add sodium silicate solution and stir, add after the mixture is fully mixed, add liquid caustic soda NaOH solution to adjust the pH value to 13. After stirring and mixing well, the mixed solution was placed in an autoclave at 180° C. for 10 hours. Cool, take out the gel-like product, wash, dry, and grind into powder, and the product is lithium magnesium silicate. Composition of Na 2 O (2.9%), Li 2 O (1.17%), Mg (28.1%), SiO 2 (62.9%), H 2 O (4.6%).

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PUM

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Abstract

The invention provides a process for producing lithium-magnesium silicate with cheap MgCl2 (MgO) and sodium silicate (potassium, potassium sodium). The process is employed to prepare a mixed solution which is prepared according to the ion ratio of MgCl2 (MgO), sodium silicate (potassium, potassium sodium) and LiCl (Li2CO3), the ion ratio is Li-1: Mg+2: Si+4=0.3: 2.7: 4, the pH value of the mixed solution is adjusted to 11-14 by aqueous alkali, and mixed solution is produced by reacting for 6-20 hours in a high-pressure reactor at the temperature of 130 DEG C to 250 DEG C, and lithium-magnesium silicate products are obtained after the mixed solution is washed, dried and ground. The molecular formula of the produced lithium-magnesium silicate is A0.3+SLi0.3+xMg2.7xSi4O10 (OH) 2, wherein A is potassium type sodium ion, 0<=S<=0.4, 0<=x<=0.2. The process is simple, the production cycle is short, and the cost is low. The invention is applicable to industrial production, and is non-toxic, nuisanceless, and non-polluted.

Description

technical field [0001] The invention relates to a hydrothermal synthesis production method of lithium magnesium silicate, which belongs to the technical field of chemical industry. Background technique [0002] Natural magnesium magnesium silicate is a kind of high-purity nano-material, the mineral name is hectorite (Hectorite), the structure formula is Na 0.3 (Mg, Li) 3 Si 4 o 10 (F,OH) 2 It is a rare mineral. [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, enamels for enamel products, aerosols, viscosity regulators, thickeners, dispersants, latex stabilizers, wine purifiers, rubber latex, cement, gel and other chemical industries. [0004] Lithium magnesium silicate has excellent performance and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20C01B33/22C01B33/32
Inventor 成增勋
Owner 成增勋
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