Method and device for preparing vaterite by using magnetic field

A technology of vaterite and magnetic field, which is applied in the fields of chemical instruments and methods, inorganic chemistry, calcium/strontium/barium compounds, etc. It can solve the problems of complex operation process, cumbersome process, and increased production cost, and achieve high product purity and simple process , low cost effect

Active Publication Date: 2017-03-15
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 form control agent have a great impact on product quality.
However, the method of regulating temperature has complicated operation process and is limited by the energy consumption of temperature control, which not only affects the economy, but also cannot obtain 100% pure vaterite in many cases.

Method used

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  • Method and device for preparing vaterite by using magnetic field
  • Method and device for preparing vaterite by using magnetic field
  • Method and device for preparing vaterite by using magnetic field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment is aimed at the low concentration of Na 2 CO 3 The reaction solution was subjected to the preparation of vaterite.

[0043] A diaphragm pump is installed at the outlet of the reactor, and a bypass flow regulating valve and a main path flow regulating valve are installed on the outlet pipeline of the diaphragm pump to adjust the flow rate of the reaction solution passing through the magnetizer.

[0044] Install a flow meter on the outlet pipeline of the main road flow regulating valve, and install a magnetizer at the outlet of the flow meter. The interior of the magnetizer is composed of a lower magnetizer, an upper magnetizer and a magnetization channel. Both the upper and lower magnetizers are composed of a turntable and a pair of permanent magnets, and each pair of permanent magnets is embedded on the turntable. On the lower magnetizer turntable, the N pole of the permanent magnet faces upward, and the S pole of the other permanent magnet faces upwar...

Embodiment 2

[0049] 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.

[0050] A diaphragm pump is installed at the outlet of the reactor, and a bypass flow regulating valve and a main path flow regulating valve are installed on the outlet pipeline of the diaphragm pump to adjust the flow rate of the reaction solution passing through the magnetizer.

[0051] Install a flow meter on the outlet pipeline of the main road flow regulating valve, and install a magnetizer at the outlet of the flow meter. The interior of the magnetizer is composed of a lower magnetizer, an upper magnetizer and a magnetization channel. Both the upper and lower magnetizers are composed of a turntable and a pair of permanent magnets, and each pair of permanent magnets is embedded on the turntable. On the lower magnetizer turntable, the N pole of the permanent magnet faces upward, and the S pole of the o...

Embodiment 3

[0056] This embodiment is aimed at high concentrations of Na 2 CO 3 The reaction solution was used to prepare vaterite.

[0057] A diaphragm pump is installed at the outlet of the reactor, and a bypass flow regulating valve and a main path flow regulating valve are installed on the outlet pipeline of the diaphragm pump to adjust the flow rate of the reaction solution passing through the magnetizer.

[0058] Install a flow meter on the outlet pipeline of the main road flow regulating valve, and install a magnetizer at the outlet of the flow meter. The interior of the magnetizer is composed of a lower magnetizer, an upper magnetizer and a magnetization channel. Both the upper and lower magnetizers are composed of a turntable and a pair of permanent magnets, and each pair of permanent magnets is embedded on the turntable. On the lower magnetizer turntable, the N pole of the permanent magnet faces upward, and the S pole of the other permanent magnet faces upward. One permanent ...

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Abstract

The invention discloses a method and a device for preparing vaterite by using a magnetic field. The method comprises: enabling a reaction solution of carbonate and calcium salt to pass through a strong magnetic field by means of vertically cutting magnetic lines of force, and then performing suction filtration, cleaning and drying treatment to obtain vaterite-typed calcium carbonate powder. The prepared vaterite has a particle diameter ranging from 1 mu m to 5 mu m, and a purity of 100%. The method for preparing the vaterite is a pure physical promotion method; compared with conventional methods, in which a crystal-formed control agent requires to be added and a pH value is adjusted and controlled, the method has a simple process, is easy to operate, has a low cost without adding any additive, a preparing process is green and environment-friendly, product purity is high, and large-scale industrial production can be achieved easily.

Description

technical field [0001] The invention relates to the technical field of vaterite preparation, in particular to a method and device for preparing vaterite by using a magnetic field. Background technique [0002] As a biological ore, calcium carbonate has various functions and low cost, and has always been an important raw material for industrial production. 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, by controlling cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
CPCC01F11/181C01P2002/72C01P2004/03C01P2004/32C01P2004/61
Inventor 杨庆峰熊小敏姜标
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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