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Preparation method of fascicular magnesium carbonate trihydrate crystals

A technology of magnesium carbonate trihydrate and crystals, applied in the direction of magnesium carbonate, etc., can solve the problems affecting the industrial production of magnesium salt fine chemical products, and achieve the effect of improving its own value, prolonging the product production chain, and no environmental pollution

Inactive Publication Date: 2016-01-27
LIAONING TECHNICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, magnesium carbonate trihydrate crystals are very sensitive to growth conditions, and the microscopic morphology of magnesium carbonate trihydrate crystals with the same structure is diverse. At present, the preparation of magnesium carbonate trihydrate crystals focuses on rod-shaped, radial and fan-shaped preparations, which seriously affects Industrial Production of Magnesium Salt Fine Chemical Products

Method used

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  • Preparation method of fascicular magnesium carbonate trihydrate crystals
  • Preparation method of fascicular magnesium carbonate trihydrate crystals
  • Preparation method of fascicular magnesium carbonate trihydrate crystals

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Embodiment 1

[0030] The preparation method of the beam-shaped magnesium carbonate trihydrate crystal of the present embodiment, as figure 1 shown, follow the steps below:

[0031] (1) Using water as a solvent, magnesium chloride hexahydrate was prepared into a 0.05mol / L solution, and ammonium bicarbonate was prepared into a 0.2mol / L solution;

[0032] (2) Add the magnesium chloride hexahydrate solution into the ammonium bicarbonate solution at room temperature, stir while adding, the stirring speed is 60r / min, after 10min, add the surfactant SDBS, the amount of surfactant SDBS Accounting for 0.01% of the magnesium chloride hexahydrate solution, the ammonium bicarbonate solution and the total mass, the addition is completed after 2 minutes, and then the pH is adjusted to 9.5 with ammonia water to obtain a reaction slurry;

[0033] (3) Move the slurry to a high-pressure reactor, the amount of slurry added accounts for 80% of the volume of the reactor, heat the slurry to 50°C and stir at th...

Embodiment 2

[0037]The preparation method of the beam-shaped magnesium carbonate trihydrate crystal of the present embodiment, as figure 1 shown, follow the steps below:

[0038] (1) Using water as a solvent, magnesium chloride hexahydrate was prepared into a 0.1mol / L solution, and ammonium bicarbonate was prepared into a 0.1mol / L solution;

[0039] (2) Add the magnesium chloride hexahydrate solution into the ammonium bicarbonate solution at room temperature, stir while adding, the stirring speed is 60r / min, after 8 minutes, add the surfactant SDBS, the amount of the surfactant SDBS Accounting for 0.5% of the magnesium chloride hexahydrate solution, ammonium bicarbonate solution and the total mass, the addition is completed after 2 minutes, and then the pH is adjusted to 9.3 with ammonia water to obtain a reaction slurry;

[0040] (3) Move the slurry to a high-pressure reactor, the amount of the slurry added accounts for 80% of the volume of the reactor, heat the slurry to 40°C and stir ...

Embodiment 3

[0044] The preparation method of the beam-shaped magnesium carbonate trihydrate crystal of the present embodiment, as figure 1 shown, follow the steps below:

[0045] (1) Using water as a solvent, magnesium chloride hexahydrate was prepared into a 0.2mol / L solution, and ammonium bicarbonate was prepared into a 0.05mol / L solution;

[0046] (2) Add the magnesium chloride hexahydrate solution into the ammonium bicarbonate solution at room temperature, stir while adding, the stirring speed is 60r / min, after 5min, add the surfactant SDBS, the amount of surfactant SDBS Accounting for 1% of the magnesium chloride hexahydrate solution, the ammonium bicarbonate solution and the total mass, the addition is completed after 2 minutes, and then the pH is adjusted to 9.0 with ammonia water to obtain a reaction slurry;

[0047] (3) Move the slurry to a high-pressure reactor, the amount of slurry added accounts for 80% of the volume of the reactor, heat the slurry to 40°C and stir at the sa...

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Abstract

The invention belongs to the field of mineral processing, and concretely relates to a preparation method of fascicular magnesium carbonate trihydrate crystals. The method comprises the following steps: adding a magnesium chloride hexahydrate solution to an ammonium bicarbonate solution at room temperature while stirring, adding a surfactant SDBS to obtain a reaction slurry, transferring the slurry to an autoclave, heating the slurry to 30-50DEG C, collecting a gas generated in the reaction process to obtain a CO2 gas product, filtering a slurry obtained after the reaction to obtain a filtrate and a filter cake, heating the filtrate at 100-150DEG C for 30-60min, carrying out low temperature condensation on the generated gas to obtain an ammonium chloride product, washing the filter cake with clear water multiple times until no Cl<-> of a washing solution can be detected, sending a solid product to a constant temperature drying box, and drying to obtain the fascicular magnesium carbonate trihydrate crystals. The preparation method of the fascicular magnesium carbonate trihydrate crystals has high efficiency, makes the target product have stable performances, and is a preparation technology with huge latent advantages.

Description

technical field [0001] The invention belongs to the field of mineral processing, and in particular relates to a method for preparing bundle-shaped magnesium carbonate trihydrate crystals. Background technique [0002] The regulated synthesis of microparticles is an important part of the development of micro-nano technology and the basis for exploring the properties and applications of micro-nano structures. However, due to different synthesis methods and preparation processes, the composition, structure, and morphology of micro-particles obtained will be very different, and their corresponding uses will also change accordingly. Although in the controllable synthesis process of micron materials, researchers hope to realize the control at any stage of its growth, and stop at the desired stage, and finally synthesize micron materials with different morphologies. However, due to technical reasons, there are only a few kinds of microstructure materials with special morphology th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/24
Inventor 闫平科高玉娟王来贵卢智强
Owner LIAONING TECHNICAL UNIVERSITY
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