Method for preparing nano pseudo boehmite and microchannel reactor

A technology of microchannel reactor and pseudo-boehmite, which is applied in the preparation of alkali metal aluminate/alumina/aluminum hydroxide, etc., to achieve the effects of controllable particle size, large operating flexibility, and fast reaction speed

Inactive Publication Date: 2009-06-10
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

The preparation of pseudoboehmite in m

Method used

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  • Method for preparing nano pseudo boehmite and microchannel reactor
  • Method for preparing nano pseudo boehmite and microchannel reactor
  • Method for preparing nano pseudo boehmite and microchannel reactor

Examples

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Embodiment 1

[0040] 1) Dissolve 9.84 grams of sodium aluminate in 200 ml of tap water to prepare a 0.6 mol / l solution, and dissolve 6.84 g of aluminum sulfate in 200 ml of tap water to prepare a 0.1 mol / l solution.

[0041] 2) Use two advection pumps to input sodium aluminate and aluminum sulfate solutions into the two inlets of the single-channel reactor respectively, and the two solutions collide and mix at the interface, and continue to react along the reaction channel. Maintain the flow rate of aluminum sulfate at 9ml / min, adjust the flow rate of sodium aluminate solution, and measure the pH value of the product at the outlet to be 7.5.

[0042] 3) Collect the aluminum salt solution at the outlet, add a small amount of Na 2 CO 3 solution, adjust the pH to 9. Put into 45 ℃ water bath and age for 24h. Then wash 3 times with centrifuge. Put it in an oven and heat it at 110°C for 10 hours, then dry it, and the conversion rate of the raw material is 100%. The dried product is ground int...

Embodiment 2

[0044] 1) Dissolve 4.92g of sodium aluminate in 200ml of tap water to prepare a 0.3mol / l solution, and dissolve 3.42g of aluminum sulfate in 200ml of tap water to prepare a 0.05mol / l solution.

[0045] 2) Use two advection pumps to input sodium aluminate and aluminum sulfate solutions to the two inlets of the single-channel reactor respectively, and the two solutions collide and mix at the interface and react along the reaction channel. The constant aluminum sulfate flow rate is 8ml / min, regulates the flow rate of sodium aluminate solution, and the pH value of the product measured at the outlet is 8.

[0046] 3) Collect the aluminum salt solution at the outlet, add a small amount of Na 2 CO 3solution to bring the pH to 9.5. Put it into a 60°C water bath for aging for 4 hours. Then wash 3 times with centrifuge. Put it in an oven and heat it at 110°C for 10 hours, then dry it, and the conversion rate of the raw material is 100%; grind the dried product into powder to obtain ...

Embodiment 3

[0048] The constant aluminum sulfate flow rate is 9ml / min, the flow rate of sodium aluminate solution is adjusted, and the pH value of the product measured at the outlet is 6. Collect the aluminum salt solution at the outlet, add a small amount of Na 2 CO 3 solution to bring the pH to 8.5. Aging at room temperature of 25°C for 48h. All the other conditions are with embodiment 1. Finally, the nano-scale target product—pure pseudo-boehmite is obtained, and the conversion rate of raw materials is 100%.

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Abstract

The invention relates to an inorganic nanometer material and a micro-channel reactor, in particular to a method for preparing nanometer pseudoboemite and a micro-channel reactor. Two paths of liquid-phase reaction liquids are conveyed into the micro-channel reactor through an advection pump and finish a precipitation reaction in the micro-channel reactor, and then a high-purity nanometer material is obtained through a series of post treatments. The method adopts a single-channel micro-reactor and a multi-channel micro-reactor. The method has the advantages of controllable process, good mixing effect of raw materials, quick reaction, high-flux operation, continuous reaction process, large operation elasticity, high time space yield, high product purity, controllable particle size dimension, and narrow particle size distribution.

Description

technical field [0001] The present invention relates to inorganic nanometer material and microchannel reactor, specifically a kind of method that is suitable for utilizing liquid-liquid direct precipitation reaction to produce nanometer material and realizes the microchannel reactor that this method adopts; It utilizes microchannel reactor , to prepare high-purity nano pseudo-boehmite by neutralization method. Background technique [0002] Microchannel reactors generally refer to reactors with reaction channel widths below 1 mm. In the early 1990s, researchers began to try to apply microreactors to chemical reactions. In just a dozen years, this technology has come a long way around the world. Various reaction types, such as liquid-liquid reaction, gas-liquid reaction, catalytic reaction, etc., can be carried out in microchannel reactors. Since the beginning of this century, the preparation of nanomaterials in microchannel reactors has aroused widespread interest. Many s...

Claims

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Application Information

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IPC IPC(8): C01F7/14
Inventor 陈光文应盈赵玉潮乐军李淑莲初建胜
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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