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Preparation method of pseudo-boehmite

A technology of pseudo-boehmite and aluminum nitrate nonahydrate, applied in the chemical industry, can solve the problems of large fluctuation of product quality, easy scarring of production equipment, low CO2 absorption rate, etc., and achieve the effect of stable product quality

Inactive Publication Date: 2019-07-02
胡方红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The above method adopts direct feeding into the reaction device CO2 is decomposed into glue, so there are following disadvantages: backward process equipment, low automation level, low labor efficiency; traditional decomposition tank has low absorption rate of CO2 and small production capacity; long reaction time, The product quality fluctuates greatly; the production equipment is prone to scarring and the operation cycle is short; it is difficult to realize continuous production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Take 100 grams of aluminum nitrate nonahydrate and 444.30 grams of deionized water, so that the concentration of aluminum ions is 0.6 mol / L, stir to dissolve quickly. Using commercially available ammonia water as the precipitant, the temperature of the water bath is controlled at 60°C during the precipitation process. During the titration precipitation process, the titration speed of the aluminum nitrate solution and ammonia water is appropriately adjusted to maintain the pH value at about 8.7, and the stirring speed is controlled at 600r / min. After the completion, continue to stir for half an hour. After the stirring is completed, transfer the above materials to an oven at 80°C for aging for 3 hours. The purpose of aging is to make the particles grow and the crystal form tends to be perfect; after the aging is completed, repeatedly suction filter and wash the materials Until the filtrate is neutral, then transfer the filter cake to a 100°C oven to dry to make pseudo-...

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PUM

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Abstract

The invention relates to a preparation method of pseudo-boehmite. The method comprises the following steps: using aluminium nitrate nonahydrate as the raw material and ammonia water as a precipitationagent, preparing a solution by aluminium nitrate nonahydrate with an aluminium ion concentration of 0.5 mol / L-1.0 mol / L, and performing cocurrent flow titration precipitation under the water bath condition of 50-80 DEG C, and then performing aging, washing and drying treatments to obtain pseudo-boehmite. According to the method, the product quality is stable, and the continuous production can berealized.

Description

technical field [0001] The invention relates to a method for preparing pseudo-boehmite, which belongs to the field of chemical industry. Background technique [0002] Alumina powder is often used as a desiccant, adsorbent, catalyst and catalyst carrier in the chemical industry. However, natural or artificially produced alumina monohydrate and alumina trihydrate have low specific surface area, small pore volume, and low activity, so they cannot be used as desiccants, adsorbents, catalysts, and catalyst supports. Pseudo-boehmite has the characteristics of high specific surface area, large pore volume, large pore diameter, and high activity. It is suitable for use as desiccant, adsorbent, and catalyst and catalyst carrier in the fields of petrochemical, fertilizer, and tail gas. Therefore, there is a need to convert alumina monohydrate or alumina trihydrate to pseudoboehmite. [0003] Pseudo-boehmite has low crystallinity, higher water content than boehmite, and often exists ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/34
CPCC01F7/34
Inventor 胡方红
Owner 胡方红