Seashell boehmite powder and preparation method thereof

Abstract

The invention relates to a seashell boehmite powder and a preparation method thereof; the proposal is that: 0.5 to 3 mol / L of AlCl3 solution and 1 to 3 mol / L of ammonia solution are respectively prepared for use, and then surfactants with 0.1 to 0.3 percent of molar AlCl3 in the AlCl3 solution is added in the AlCl3 solution for being stirred for 0.5 to 1 hour, under the stirring condition and at the temperature of 60 to 100 DEG C, the AlCl3 solution added with the surfactants is added in the ammonia solution, the pH value is controlled to 705 to 10.5, and the stirring operation is carried out for 0.5 to 3 hours, thereby obtaining front body boehmite sedimentation; and then the sedimentation is pumped and filtered by pure water to obtain filter cakes, the filter cakes are dispersed in the pure water according to the molar proportion of 1 : (9 to 49) of the boehmite and the pure water, and the boehmite suspended liquid is obtained after being stirred for 0.5 to 2 hours, after the boehmite suspended liquid is dried, the seashell boehmite powder is obtained. The preparation method has the characteristics of low cost, less energy consumption and simple process, the obtained powder has no agglomeration, the particle size distribution range is narrow, the appearance is uniform and the specific surface area is high.

Description

technical field [0001] The invention belongs to the technical field of powder preparation. Specifically relates to a shell-like boehmite powder and a preparation method thereof. Background technique [0002] Boehmite particles with different morphological characteristics can be prepared by various existing manufacturing methods. These prepared particles basically have a boehmite structure or a pseudo boehmite structure as alumina hydrate of crystalline structure and amorphous alumina hydrate also called amorphous, and , As for its shape, plate shape, cake shape, ribbon shape, spindle shape, needle shape, fiber shape and the like are known. [0003] "A preparation method of nanocrystalline boehmite" (CN101177290) describes a preparation method of nanocrystalline boehmite. The method uses distilled water and aluminum isopropoxide as raw materials to prepare nano Crystal boehmite. The main shortcoming of this method is: (1) this preparation method takes aluminum isopropoxid...

AI Technical Summary

Problems solved by technology

The main shortcoming of this method is: (1) this preparation method takes aluminum isopropoxide as raw material, and cost is high, is not suitable for industrial production; (2) this preparation method will be carried out in autoclave, and reaction temperature is high, and the time is long, high energy consumption

The main disadvantages of this method are: (1) the equipment used in the preparation method is complicated and requires high operation; (2) aluminum alcoholate is used as raw material, which has high cost and is not suitable for industrial production

The main disadvantage of this method is that it needs to react in a hydrothermal kettle for 2-60 hours at a temperature of 160-250°C, which requires high energy consumption and long preparation period.

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