Spherical and radial magnesium carbonate and preparation method thereof

A radial, magnesium carbonate technology, applied in magnesium carbonate and other directions, to achieve the effects of wide source, low cost, improved morphology and performance

Inactive Publication Date: 2009-12-30
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no bibliographical report on spherical and radial

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  • Spherical and radial magnesium carbonate and preparation method thereof
  • Spherical and radial magnesium carbonate and preparation method thereof
  • Spherical and radial magnesium carbonate and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment one, the preparation method of spherical magnesium carbonate

[0038] (1) Dissolve industrial grade magnesium chloride in water, and obtain a solution with a concentration of 1.0mol / L after filtration; dissolve industrial grade sodium carbonate in water, and obtain a solution with a concentration of 1.2mol / L after filtration.

[0039] (2) Take 10 mL of each of the above two solutions and place them in a constant temperature water bath to keep the temperature at 30°C.

[0040] (3) Weigh 23.025g of sodium tartrate, dissolve it, transfer it to a 200mL volumetric flask, dilute to volume, and prepare a solution with a concentration of 0.50mol / L.

[0041] (4) get the sodium tartrate solution that 5mL step (3) configuration is placed in reaction vessel, stir with the speed of 500rpm with magnetic stirrer; After finishing the solution, the concentration of sodium tartrate in the reaction system was 0.1mmol / L. After the dropwise addition of the solution was complete...

Embodiment 2

[0045] Embodiment two, the preparation method of radial magnesium carbonate

[0046] (1) Dissolve industrial grade magnesium chloride in water, and obtain a solution with a concentration of 1.0mol / L after filtration; dissolve industrial grade sodium carbonate in water, and obtain a solution with a concentration of 1.2mol / L after filtration.

[0047] (2) Take 10 mL of each of the above two solutions and place them in a constant temperature water bath to keep the temperature at 50°C.

[0048] (3) Weigh 23.025g of sodium tartrate, dissolve it, transfer it to a 200mL volumetric flask, dilute to volume, and prepare a solution with a concentration of 0.50mol / L.

[0049] (4) Get the sodium tartrate solution of 10mL configuration, be placed in reaction vessel, stir with the speed of 900rpm with magnetic stirrer; The concentration of sodium tartrate in the reaction system was 0.2mmol / L. After the dropwise addition was completed, the stirring was continued for 4 minutes, and then the ...

Embodiment 3

[0053] Embodiment three, the preparation method of radial magnesium carbonate

[0054] (1) Dissolve industrial grade magnesium chloride in water, and filter to obtain a solution with a concentration of 1.0mol / L; dissolve industrial grade sodium carbonate in water, and obtain a solution with a concentration of 1.2mol / L after filtration.

[0055] (2) Take 20 mL of each of the above two solutions and place them in a constant temperature water bath to keep the temperature at 25°C.

[0056] (3) Weigh 1.005g of polyacrylamide, dissolve it and transfer it to a 250mL volumetric flask, constant volume, and prepare a solution with a concentration of 4.02g / L.

[0057] (4) Take 5 mL of polyacrylamide solution and place it in a reaction vessel, stir it with a magnetic stirrer at a speed of 500 rpm; add the above-mentioned constant temperature magnesium chloride solution and sodium carbonate solution dropwise into the reaction vessel at the same time, after adding the solution, the reaction...

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Abstract

The invention provides a spherical and radial magnesium carbonate and a preparation method thereof. The method comprises the following steps: taking soluble magnesium salts and soluble carbonate as raw materials, taking surface active substances as additives, controlling reaction temperature at 15-75 DEG C in an aqueous solution system, keeping reaction for 2-20min; letting precipitate after the reaction stand for 1-6 days, washing and drying to obtain the spherical and radial magnesium carbonate product with intact crystal, little impurity in the crystal and high purity. The method is characterized by adding the surface active substances in preparation, which obviously improves shape and performance of the magnesium carbonate product, thus the magnesium carbonate product is easily filtered, better dispersed, and not easily conglobed. The magnesium carbonate product can be taken as an additive in industries such as plastics industry and rubber industry, and also can be taken as a raw material for preparing high-purity magnesia and other magnesium salts.

Description

field of invention [0001] The invention relates to the technical field of chemical industry, and relates to a magnesium carbonate and a preparation method thereof, in particular to a spherical and radial magnesium carbonate prepared by using soluble magnesium salt and soluble carbonate and a method thereof. Background technique [0002] Magnesium carbonate is a white, odorless powder with two common forms: amorphous powder and monoclinic crystal. Due to its special structure and properties, magnesium carbonate is widely used in medicine, cosmetics, rubber industry, printing industry and other fields. Industrial-grade magnesium carbonate can be used as an excellent filler and reinforcing agent for rubber products, and can also be used as a heat-insulating and high-temperature-resistant fireproof and thermal insulation material. Pharmacopoeia-grade magnesium carbonate can be used as an additive for beverages and daily chemical products, as well as for gastric acid neutralizat...

Claims

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Application Information

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IPC IPC(8): C01F5/24
Inventor 吴志坚郭敏李权葛飞
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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