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A kind of preparation method of lithium-based bentonite

A lithium-based bentonite and bentonite technology, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve problems such as water separation, and achieve the effect of expanding the scope of application, low cost, and suitable for popularization and application.

Active Publication Date: 2020-11-20
苏州中材非金属矿工业设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the practical application proves that the lithium-based bentonite obtained by the above-mentioned patent method still has the phenomenon of water separation, especially when there is a large amount of Ca in the water. 2+ , Mg 2+ In addition, the thickening performance (viscosity) of the lithium-based bentonite still has room for further improvement

Method used

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  • A kind of preparation method of lithium-based bentonite
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of lithium-based bentonite, comprising the steps of:

[0028] (1) the bentonite raw material in the bentonite mineral is screened, and the bentonite raw material is obtained after impurity removal and purification;

[0029] (2) Grinding bentonite raw materials after drying to obtain powdered bentonite; the particle size of powdered bentonite is about 200 mesh; the main indicators of powdered bentonite are: montmorillonite content is 61.32%, swelling capacity is 10.23mL / g , Gum price 68mL / 15g soil;

[0030] (3) Add 20g of lithium carbonate to 1kg of powdered bentonite for lithiation; then add 20g of citric acid, stir at high speed in the mixer, heat up to 40°C while stirring, and then keep warm for 15min;

[0031] (4) cooling to room temperature to obtain the lithium-based bentonite.

Embodiment 2

[0033] A preparation method of lithium-based bentonite, comprising the steps of:

[0034] (1) the bentonite raw material in the bentonite mineral is screened, and the bentonite raw material is obtained after impurity removal and purification;

[0035] (2) Grinding bentonite raw materials after drying to obtain powdered bentonite; the particle size of powdered bentonite is about 200 mesh; the main indicators of powdered bentonite are: montmorillonite content is 61.32%, swelling capacity is 10.23mL / g , Gum price 68mL / 15g soil;

[0036] (3) Add 20g of lithium carbonate to 1kg of powdered bentonite for lithiation; then add 20g of oxalic acid, stir at high speed in the mixer, heat up to 40°C while stirring, and then keep warm for 15min;

[0037] (4) cooling to room temperature to obtain the lithium-based bentonite.

Embodiment 3

[0039] A preparation method of lithium-based bentonite, comprising the steps of:

[0040] (1) the bentonite raw material in the bentonite mineral is screened, and the bentonite raw material is obtained after impurity removal and purification;

[0041] (2) Grinding bentonite raw materials after drying to obtain powdered bentonite; the particle size of powdered bentonite is about 200 mesh; the main indicators of powdered bentonite are: montmorillonite content is 61.32%, swelling capacity is 10.23mL / g , Gum price 68mL / 15g soil;

[0042](3) Add 20g of lithium carbonate to 1kg of powdered bentonite for lithiation; then add 10g of oxalic acid and 10g of citric acid, stir at high speed in the mixer, heat up to 40°C while stirring, and then keep warm for 15min;

[0043] (4) cooling to room temperature to obtain the lithium-based bentonite.

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Abstract

The invention discloses a preparation method of lithium bentonite. The preparation method comprises the following steps: (1) screening bentonite raw materials in bentonite minerals to obtain the bentonite raw materials after impurity removal and purification; (2) drying the bentonite raw materials and then grinding to obtain powdery bentonite; (3) adding a lithium catalyst to the powdery bentonitefor lithiation; then adding organic acid, stirring sufficiently, heating to 30-80 DEG C while stirring and then keeping the temperature for 5-20 min; (4) cooling to the room temperature to obtain thelithium bentonite. An experiment proves that the lithium bentonite product prepared by the method has excellent suspension performance compared with the prior art; in a 1% water dispersion system, although the effective content of the lithium bentonite is lowered, the change in the viscosity and the thixotropic performance is not obvious, the suspension performance of the product in distilled water and in water containing Ca2+ and Mg2+ is greatly improved, and the time required for dispersion into colloids is remarkably lowered, so that the application range can be further expanded.

Description

technical field [0001] The invention relates to the field of bentonite manufacture, in particular to a preparation method of lithium-based bentonite. Background technique [0002] Clay products are widely used in agriculture, light industry, metallurgy, chemical industry, building materials, machinery, national defense, environmental protection and other industrial sectors because of their unique and excellent properties, such as slipperiness, adsorption, and expansibility. In the paint coating industry, as the country pays more and more attention to environmental protection, solvent-based paints are more and more replaced by water-based paints, such as water-based industrial paints and water-based building materials, because they use a large amount of volatile solvents and cause environmental pollution. Paint, water-based home improvement paint, etc. In the water-based coating industry, clay minerals have attracted widespread attention as a good thickening, suspension, thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/40
CPCC01B33/40
Inventor 雷东升汪思孝吴志能
Owner 苏州中材非金属矿工业设计研究院有限公司
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