Method for preparing nanometer barium sulfate by using molecule mixing strengthening reactor

A nano-barium sulfate and reactor technology, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of high difficulty in purification, large particle size of products, and complex post-processing, etc., to achieve improved Nucleation rate, inhibition of particle size growth, and effect of increasing gloss

Active Publication Date: 2016-02-17
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above methods have the disadvantages of large product particle size, high difficulty in purification, and complicated post-processing.

Method used

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  • Method for preparing nanometer barium sulfate by using molecule mixing strengthening reactor
  • Method for preparing nanometer barium sulfate by using molecule mixing strengthening reactor
  • Method for preparing nanometer barium sulfate by using molecule mixing strengthening reactor

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Experimental program
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Effect test

Embodiment approach

[0047] 1, the high gravity rotating packed bed reactor used in the present invention is prior art, such as disclosed patent (ZL952154307); The reaction scheme of a kind of embodiment of the high gravity rotating packed bed reactor that the present invention adopts is as figure 1 As shown, the schematic diagram of the high-gravity rotating packed bed reactor is shown in figure 2 shown. The implementation is as follows:

[0048] Turn on the supergravity rotating device 1, and adjust the rotating speed so that the rotating speed in the rotor of the supergravity device reaches a predetermined value. The barium salt solution in the barium salt solution storage tank 2 is pumped into the barium salt solution feed port 12 in the supergravity rotary device through a pump; the sulfate solution in the sulfate solution storage tank 3 is pumped into the high gravity rotary device through a pump Sulfate solution feed port 13; the rotor 11 in the supergravity device is driven by the motor...

Embodiment 1

[0053] The barium chloride molar concentration is 1.5mol / L aqueous solution 4000ml joins in the barium salt solution storage tank; The sodium sulfate molar concentration is 1.5mol / L aqueous solution 4000ml joins in the sulfate solution storage tank;

[0054] Turn on the high-gravity rotating device, adjust the speed to 1000rpm; turn on the feed pump, and simultaneously transport the barium salt solution and the sulfate solution to the rotating bed for precipitation and crystallization reaction, and control the feeding rate of the barium salt solution and the sulfate solution. The temperature of the reaction system is 1000ml / min, and the temperature of the reaction system is controlled to be 25°C; after the feeding of the barium salt solution and the sulfate solution is completed, and the suspension obtained from the reaction flows out of the supergravity rotating device, close the supergravity rotating device;

[0055] Centrifuge the obtained suspension, adjust the rotation spe...

Embodiment 2

[0059] The barium chloride molar concentration is that 5000ml of the aqueous solution of 1.2mol / L is added in the barium salt solution storage tank; The aqueous solution 5000ml that the ammonium sulfate molar concentration is 1.2mol / L is joined in the sulfate solution storage tank;

[0060]Turn on the high-gravity rotating device, adjust the speed to 1200rpm; turn on the feed pump, and simultaneously transport the barium salt solution and the sulfate solution to the rotating bed for precipitation and crystallization reaction, and control the feeding rate of the barium salt solution and the sulfate solution. The temperature of the reaction system is 800ml / min, and the temperature of the reaction system is controlled to be 30°C; after the feeding of the barium salt solution and the sulfate solution is completed, and the suspension obtained from the reaction flows out of the supergravity rotating device, close the supergravity rotating device;

[0061] Centrifuge the obtained susp...

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Abstract

The invention discloses a method for preparing nanometer barium sulfate by using a molecule mixing strengthening reactor. A barium salt solution and dilute sulphuric acid or a sulphate solution are added into the molecule mixing strengthening reactor for reaction, after reaction, a barium sulfate suspending liquid is obtained; the molecule mixing strengthening reactor is a hypergravity rotating packed bed reactor or a tube-in-tube microchannel reactor; aftertreatment for the obtained barium sulfate suspending liquid is carried out, and nanometer barium sulfate powder is obtained. The hypergravity rotating packed bed reactor or the tube-in-tube microchannel reactor has the advantages of simultaneous control of reaction temperature, concentration of reaction solution, injection rate and injection speed ratio, and requirements of reaction product nanometer barium sulfate obtained finally, such as particle sizes (all smaller than 30nm) are smallest and distribution is narrowest, are met.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a preparation method of nanomaterials, in particular to a method for preparing nanometer barium sulfate. Background technique [0002] Barium sulfate is an important inorganic chemical raw material, widely used in fillers, coatings, high-grade paints, high-grade inks, plastics, ceramics and other industries. With the development and utilization of new functional devices and the vigorous development of the material industry, barium sulfate, as an important raw material in many industries, its application fields are expanding day by day, and its quality requirements have been significantly improved. In recent years, many countries have actively carried out the improvement of traditional synthesis processes, especially seeking new breakthroughs in improving product structure and quality, reducing energy consumption, and simplifying processes. The development and application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/46B82Y30/00
Inventor 陈建峰王江王洁欣
Owner BEIJING UNIV OF CHEM TECH
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