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Method for preparing nano calcium hydroxide by adopting micro-channel reactor

A technology of microchannel reactor and calcium hydroxide, applied in calcium/strontium/barium oxide/hydroxide, nanotechnology, recycling technology, etc., can solve the problem of large particle size of nano calcium hydroxide particles and easy agglomeration question

Pending Publication Date: 2022-08-05
镇江华茂新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: In order to solve the defects of the prior art, the present invention provides a method for preparing nano-calcium hydroxide using a microchannel reactor, aiming to solve the problem of nano-calcium hydroxide through the method of forced micro-mixing and comb-shaped molecular structure dispersant. The problem of large particle size and easy agglomeration

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  • Method for preparing nano calcium hydroxide by adopting micro-channel reactor
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  • Method for preparing nano calcium hydroxide by adopting micro-channel reactor

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Effect test

Embodiment 1

[0044] The mixed solution of calcium chloride and dispersant DT-1 at room temperature, with a calcium chloride concentration of 0.1mol / L dispersed agent concentration of 0.111g / L. The sodium hydroxide solution is tied at room temperature, and the concentration of sodium hydroxide is 0.1mol / L. Adjust the duplex flat pump flow to 5ml / min, and use the Y -type reactor to push the mixed solution and alkaline solution simultaneously. After entering the mixing kettle at high speed, it is quickly stirred at 1500rpm. After testing, the particle size is 75nm.

Embodiment 2

[0046] The mixed solution of calcium chloride and dispersant DT-1 at room temperature, calcium chloride concentration is 0.1mol / L, and the dispersant concentration is 0.111g / L. The sodium hydroxide solution is tied at room temperature, and the concentration of sodium hydroxide is 0.1mol / L. Adjust the duplex flat pump flow to 0.5ml / min, and use the Y -type reactor to enter the mixed solution and alkaline solution simultaneously. After entering 1500rpm at the high speed of the material, it is quickly stirred for 1 hour at a speed of 1500rpm to obtain a sample of nano hydrogen oxide. After testing, the particle size is 110nm.

Embodiment 3

[0048] The mixed solution of calcium chloride and dispersant DT-1 at room temperature, calcium chloride concentration is 0.1mol / L, and the dispersant concentration is 0.111g / L. The sodium hydroxide solution is tied at room temperature, and the concentration of sodium hydroxide is 0.2 mol / L. Adjust the duplex flat pump flow to 5ml / min, and use the Y -type reactor to push the mixed solution and alkaline solution simultaneously. After entering the mixing kettle at high speed, it is quickly stirred at 1500rpm. After testing, the particle size is 55nm.

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Abstract

The invention provides a method for preparing nano calcium hydroxide by adopting a micro-channel reactor, which comprises the following steps: preparing a mixed solution of calcium salt and a dispersing agent and an alkali solution, then simultaneously injecting the two solutions into the micro-channel reactor at a certain speed to react, and quickly stirring the flowing reaction solution to obtain a nano calcium hydroxide suspension. The mixing efficiency of the calcium salt solution and the alkali solution can be greatly improved by adopting a forced micro-mixing feeding mode of the micro-channel reactor, the particle size of the calcium hydroxide particles can be reduced, the particle size of the obtained calcium hydroxide particles is 50-200 nanometers, and the advantages are remarkable.

Description

Technical field [0001] The present invention is a technology field of nano -hydroxide preparation, which specially involves a method of using microcontuncture reactors to prepare nano hydroxide. Background technique [0002] Calcium hydroxide is a traditional chemical raw material. It is widely used in rubber, plastic, building materials, and chemicals. It is specific as a considerable cost of applied costs such as flame retardant, desulfurization agent, environmental consumer plastic additives, and adsorption agents. Increasing the surface area of ​​sodium hydroxide particles, reducing its particle size is an effective way to improve its application performance. [0003] The liquid phase method is a common method for preparing sodium nano hydroxide. The patented CN104069793A revealed a preparation method of high adsorption activated calcium hydroxide nanoparticles. Under the mixing effect of a magnetic mixer, drip NaOH solution into CACL 2 The mixture with SDS or PEG, stir for 0...

Claims

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Application Information

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IPC IPC(8): C01F11/02B82Y40/00C08F283/06C08F222/02C08F220/06
CPCC01F11/02B82Y40/00C08F283/065C01P2004/64C01P2004/62C08F222/02C08F220/06Y02W30/62
Inventor 王伟山
Owner 镇江华茂新材料科技有限公司
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