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Method with single-channel mixing adapter and precipitation for manufacturing nano-powder

A nano-powder and mixer technology, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of difficult acid-base precipitation reaction, small diameter of microchannel, and inability to carry out the reaction. , to achieve the effect of uniform particle size, simple method and narrow distribution

Pending Publication Date: 2018-03-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main problem of this method may be that the diameter of the microchannel is small. During the synthesis process, the accumulation of nanoparticles will deposit in the channel and block the microchannel, resulting in the failure of subsequent reactions, and it is difficult to use in a large amount of acid and alkali. Precipitation reaction

Method used

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  • Method with single-channel mixing adapter and precipitation for manufacturing nano-powder
  • Method with single-channel mixing adapter and precipitation for manufacturing nano-powder

Examples

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Embodiment 1

[0030] Embodiment 1 methanol synthesis catalyst CuO-ZnO-Al 2 o 3 preparation

[0031] 105 kg copper nitrate Cu(NO 3 ) 2 ·3H 2 O, 47 kg of zinc nitrate Zn (NO 3 ) 2 ·6H 2 O, 30 kg of aluminum nitrate Al(NO 3 ) 3 9H 2 O dissolved in deionized water to form 1m 3 Solution, heated to 60°C, labeled as Solution A. 132 kg anhydrous Na 2 CO 3 solution deionized water to form 1m 3 solution, labeled Solution B. Heat solution A and solution B to 60°C, keep the raw materials warm, and feed them into the single-channel mixer of the present invention at a flow rate of 40 L / min with a metering pump. The flow rate of nitrogen in the gas distributor is 4L / min, the mixer is controlled by jacket constant temperature water at 60°C, the residence time in the mixer is 12s, the residence time in the stabilizer is 40s, and the reaction precipitation liquid enters the aging stirring tank for aging for 2 hours , and then washed, dried, roasted at 350°C for 4 hours, and molded to obtain t...

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Abstract

The invention discloses a method with single-channel mixing adapter and precipitation for manufacturing nano-powder. The single-channel mixing adapter includes mixing adapters and stabilizers with mixing mechanisms inside, which connect with each other in succession. A gas distributor is installed on the pipeline connecting with liquid at the liquid entry end of the mixing adapter. The liquid, firstly, passes through the mixing adapter, in which the liquid, after being mixed uniformly, becomes sediments. Then, the sediments enter into the stabilizer to grow stably, after which products flows out through a material guiding pipe. Then, the products, after being matured, separated, dried or drily roasted, become nano-powders. By adopting the method with single-channel mixing adapter and precipitation to produce nano-powder, the liquid can be mixed uniformly in the mixing adapter. At the same time, the produced sediments can grow stably in the stabilizer. Also, by adopting the method withsingle-channel mixing adapter and precipitation to produce nana-powder, the nucleation process and the growing process of the sediments in precipitation reaction can be separated. The diameter of theproduced particles can be adjusted. The dispersity of the particles is good. The distribution of the particles is narrow. The differences of the features of the particles are small. The method with single-channel mixing adapter and precipitation for manufacturing nano-powder is simple and is convenient for industrial manufacturing.

Description

technical field [0001] The invention relates to the technical field of nano powder preparation, in particular to a method for preparing nano powder by using a single-channel mixer. Background technique [0002] Nanomaterials are one of the most active fields of current research. Nanopowders in them have unique mechanical, electrical, magnetic, thermal, optical and chemical properties due to their surface effects, quantum size effects and macroscopic quantum tunneling effects. It has a wide range of applications in catalysis, pigments, composite materials and many other fields. At present, the preparation of nano-powder by precipitation reaction in industry is generally carried out batchwise in the reactor, and the main feeding methods are: forward addition, reverse addition, and combined addition. Regardless of the addition method, the chemical reaction begins. With the increase of supersaturation, crystal nuclei are formed. When the material is continuously added, new crys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/24B01J19/00B01J23/80C07C29/00C07C31/04
CPCB01J19/0053B01J19/24C07C29/00B01J23/002B01J23/80B01J2523/00C07C31/04B01J2523/17B01J2523/27B01J2523/31Y02P20/52
Inventor 方传艳林定标孙剑陈崇文徐恒泳邵炜
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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