Method and device for utilizing dynamic magnetic stirring paddle to prepare vaterite

A technology of magnetic stirring and vaterite, applied in chemical instruments and methods, inorganic chemistry, calcium/strontium/barium compounds, etc., can solve the problems of increased production cost, complicated operation process, cumbersome process, etc., and achieve strong magnetic field and high product quality The effect of high purity and simple process

Active Publication Date: 2017-01-25
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the preparation method of adding a crystal form control agent and adjusting pH, the final product needs to remove the control agent to purify the product. Not only the process is cumbersome, but also the production cost is increased. The stability and reliability of the crystal fo

Method used

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  • Method and device for utilizing dynamic magnetic stirring paddle to prepare vaterite
  • Method and device for utilizing dynamic magnetic stirring paddle to prepare vaterite
  • Method and device for utilizing dynamic magnetic stirring paddle to prepare vaterite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment is aimed at the low concentration of Na 2 CO 3 The reaction solution was subjected to the preparation of vaterite.

[0036] A magnetic stirring paddle is installed in the reactor, and the magnetic stirring paddle is connected with a controller to control the rotation speed of the magnetic stirring paddle, and the stirring of the magnetic stirring paddle is used to mix the reaction solution evenly. The magnetic induction of the permanent magnet on the magnetic stirring paddle is 2000 Gauss.

[0037] Turn on the controller, and mix 15ml of Na with a concentration of 0.005mol / L at a stirring rate of 300 rpm 2 CO 3 The solution is introduced into the reactor at a uniform speed at a rate of 1.0ml / min, and the concentration is 0.005mol / L of 15ml CaCl 2 in solution. Under the stirring action of the magnetic stirring paddle, the reaction solution cuts the strong magnetic field formed by the permanent magnet on the stirring paddle. The rotating stirring magn...

Embodiment 2

[0041] This embodiment is aimed at the NaHCO of low concentration 3 Reaction solution, change the magnetic treatment conditions, and carry out the preparation of vaterite.

[0042] A magnetic stirring paddle is installed in the reactor, and the magnetic stirring paddle is connected with a controller to control the rotation speed of the magnetic stirring paddle, and the stirring of the magnetic stirring paddle is used to mix the reaction solution evenly. The magnetic induction of the permanent magnet on the magnetic stirring paddle is 3000 Gauss.

[0043] Turn on the controller, and mix 150ml of NaHCO with a concentration of 0.005mol / L at a stirring rate of 500 rpm. 3 The solution is introduced into the reactor at a uniform speed at a rate of 7.5ml / min and is 75ml of CaCl with a concentration of 0.005mol / L 2 in solution. Under the stirring action of the magnetic stirring paddle, the reaction solution cuts the strong magnetic field formed by the permanent magnet on the stirri...

Embodiment 3

[0047] This embodiment is aimed at high concentrations of Na 2 CO 3 The reaction solution was used to prepare vaterite.

[0048] A magnetic stirring paddle is installed in the reactor, and the magnetic stirring paddle is connected with a controller to control the rotation speed of the magnetic stirring paddle, and the stirring of the magnetic stirring paddle is used to mix the reaction solution evenly. The magnetic induction of the permanent magnet on the magnetic stirring paddle is 4000 Gauss.

[0049] Turn on the controller, and at a stirring rate of 800 rpm, mix 150ml of Na with a concentration of 0.1mol / L 2 CO 3 The solution is 150ml CaCl with a concentration of 0.1mol / L introduced into the reactor at a uniform speed at a rate of 7.5ml / min 2 in solution. Under the stirring action of the magnetic stirring paddle, the reaction solution cuts the strong magnetic field formed by the permanent magnet on the stirring paddle. The rotating stirring magnetic field promotes the ...

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Abstract

The invention discloses a method and a device for utilizing a dynamic magnetic stirring paddle to prepare vaterite. The method comprises the following steps of arraying permanent magnets according to the sequence to prepare the magnetic stirring paddle; placing the magnetic stirring paddle into a reactor; under the condition of stirring, feeding a carbonate solution into a calcium salt solution in the reactor at a constant speed; utilizing a high-intensity magnetic field formed by the permanent magnets on the magnetic stirring paddle for enabling the solution in the reactor to cut magnetic lines; then pumping filtering, washing and drying the reaction solution to obtain the vaterite. The method for preparing the vaterite is a pure physical promotion method, which is simple in process, easy to operate, low in cost, dispensed with any additive, and green and environment-friendly in production process compared with traditional methods requiring adding crystal form control agents and regulating pH. A dynamic rotation magnetic stirring method is adopted, so that the action of the magnetic field is strong, the product purity is high, 100 percent of vaterite type calcium carbonate can be generated, and the method and the device can be largely applied in preparing the vaterite type calcium carbonate.

Description

technical field [0001] The invention relates to the technical field of preparing vaterite, in particular to a method and a device for preparing vaterite by using a dynamic magnetic stirring paddle. Background technique [0002] As a biological ore, calcium carbonate has been an important raw material for industrial production because of its diverse functions and low cost. Calcium carbonate powder is widely used in pharmaceuticals, detergents, biomedicine, rubber, plastics, paper, toothpaste, cosmetics, coatings and food industries, as whitening agents, adsorbents, additives and biomedical materials. The above uses are determined by the characteristic properties of the prepared calcium carbonate material, such as average particle size, particle size distribution, specific surface area, morphology or chemical purity. The physical and chemical properties of precipitated calcium carbonate are highly affected by the synthesis steps, methods and synthesis conditions. Therefore, b...

Claims

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Application Information

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IPC IPC(8): C01F11/18
CPCC01F11/181C01P2002/72C01P2004/03C01P2004/61C01P2006/80
Inventor 杨庆峰熊小敏姜标
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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