Preparation method of micro-nanometer powder, reinforced micro-reaction device and micro-reaction system

A micro-reaction device, micro-nano technology, applied in the direction of microsphere preparation, microcapsule preparation, chemical/physical/physicochemical process of energy application, etc., can solve the difficulty in the application of microreactors and the difficulty in achieving large throughput , difficult to continue and other problems, to achieve the effect of good product quality stability, uniform appearance, and prevent clogging

Active Publication Date: 2015-01-07
SHENZHEN ACAD OF AEROSPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is mainly due to the fact that the reaction must be carried out in sub-micron to sub-millimeter microchannels, which will generate a large pressure drop, and it is difficult to achieve the requirements of large throughput.
Especially for the liquid phase reaction with precipitation, it is more likely to cause the blockage of the microchannel and the difficulty of continuing the reaction
At the same time, micro-devices still have problems such as processing difficulties and high processing costs.
All of these have led to considerable difficulties in the application of microreactors in the liquid phase reaction of generating precipitation, and some new technologies need to be further developed to solve this problem

Method used

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  • Preparation method of micro-nanometer powder, reinforced micro-reaction device and micro-reaction system
  • Preparation method of micro-nanometer powder, reinforced micro-reaction device and micro-reaction system
  • Preparation method of micro-nanometer powder, reinforced micro-reaction device and micro-reaction system

Examples

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Effect test

Embodiment 1

[0037] This example provides an enhanced micro-reaction device for preparing micro-nano powder, which is composed of a pipeline and an ultrasonic generator 9, the pipeline has a central channel 13 with a gradually enlarged size, and the ultrasonic generator 9 is arranged in the central channel 13 external. Further, the pipeline is also provided with a circulating fluid channel, which is located outside the central channel and is provided with a water inlet 18 and a water outlet 19 . The circulating fluid channel is divided into two parts 14 and 15, which are connected to each other and arranged symmetrically outside the central channel for the circulating fluid to pass through. The circulating fluid is water to control the reaction temperature. Furthermore, the pipeline is also provided with a sonotrode installation cavity, and the sonotrode installation cavity is located outside the central channel 13; the sonotrode 9 is installed in the sonotrode installation cavity. The s...

Embodiment 2

[0047] Prepare SiO using the micro-reaction system and method provided in Example 1 2 Microspheres: a. Dissolve the tetraethyl orthosilicate processed through secondary vacuum distillation in absolute ethanol, and configure a solution A with a molar concentration of 0.8mol / L and place it in the storage tank of the feeding device; Yes, dissolve twice-distilled water and analytically pure ammonia water in absolute ethanol to form a solution B with a molar concentration of water of 8 mol / L and a molar concentration of ammonia of 1.6 mol / L and place it in another storage tank of the feeding device Middle; b. Turn on the circulating water system, and pass circulating water at 30°C and 35°C into the micro-mixing device and the enhanced micro-reaction device respectively; at the same time, first turn on the ultrasonic wave of the micro-mixing device, adjust the ultrasonic frequency at 28KHz, and the ultrasonic power at 200W; c. Turn on the two constant flow pumps, pump the equal volu...

Embodiment 3

[0049] Adopt the micro reaction system and method that embodiment one provides to prepare nanometer Fe 3 o 4 : a. Dissolve ferrous iron salt and ferric iron salt in distilled water respectively, and configure Fe 2+ Fe with a molar concentration of 0.3mol / L and 3+ Solution A with a molar concentration of 0.55mol / L is placed in the storage tank of the feeding device; similarly, solution B with a molar concentration of ammonia of 3.0mol / L is placed in the feeding device by dissolving analytically pure ammonia water in distilled water b. Turn on the circulating water system, and pass circulating water at 50°C and 60°C into the micro-mixing device and the enhanced micro-reaction device respectively; at the same time, first turn on the ultrasonic wave of the micro-mixing device and adjust the ultrasonic frequency At 40KHz, the ultrasonic power is 250W; c. Turn on the two constant flow pumps, pump the equal volumes of solutions A and B into the micro-mixing device at the same time,...

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Abstract

The invention provides a reinforced micro-reaction device for preparing micro-nanometer powder, a micro-reaction system and a preparation method of the micro-nanometer powder. The micro-reaction system comprises a feeding device, a micro-fixing device, the reinforced micro-reaction device and a storage chute; the reinforced micro-reaction device comprises a pipe and an ultrasonic generator; the pipe comprises a central passage with size increasing gradually; and the ultrasonic generator is arranged outside the central passage. The micro-reaction system has the advantages of being rapid in mixing speed, strong in mass transfer capability, low in energy consumption, easy for amplification and strong in operation control, effectively preventing the blockage of micro-reaction passages and the agglomeration of nanometer particles and the like. In the preparation method, the two processes of mixing and reaction are divided and can be respectively carried out in the micro-mixing device and the reinforced micro-reaction device so that the low-cost, high-efficiency, stable-performance and controllable-quality continuous production of the micro-nanometer powder is realized. The device, the system and the method are particularly suitable for the industrial production of chemical liquid-phase reaction with rapid reaction speed and high momentum, energy and quality transfer requirements and having solid generated.

Description

technical field [0001] The invention belongs to the technical field of micro-nano powder preparation, and in particular relates to an enhanced micro-reaction device for preparing micro-nano powder, a micro-reaction system and a preparation method for micro-nano powder. Background technique [0002] Micro-nano powder is a solid particle material in the transition zone between atomic clusters and macroscopic objects, and it is the basis for preparing a variety of new materials. It has electrical, magnetic, optical, thermal or mechanical properties that are completely different from bulk materials, and is widely used in electronic devices, medicine and health, aerospace, aviation and space exploration, environment, resources and energy, and biotechnology, etc. field, with broad application prospects and huge economic benefits. [0003] In the industrial development of micro-nano powder, the lack of large-scale high-performance micro-nano powder preparation technology has alway...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/10B01J13/02
Inventor 万军喜曹海琳李霞
Owner SHENZHEN ACAD OF AEROSPACE TECH
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