Hydrothermal treatment device and method for preparing high-peptizing large-pore-volume pseudo-boehmite powder

Abstract

The invention discloses a hydro-thermal treatment device and method for preparing high-peptization large-pore-volume pseudo-boehmite powder, relates to the field of preparation of pseudo-boehmite powder, and solves the problems that an existing hydro-thermal treatment device for preparing the high-peptization large-pore-volume pseudo-boehmite powder is tedious in operation and prone to deviation during pH value adjustment. Comprising a reaction kettle body, a detection device and a dropwise adding device, a driving motor is fixedly connected to the reaction kettle body, according to the hydro-thermal treatment device for preparing the high-peptizing large-pore-volume pseudo-boehmite powder, by arranging the detection device and the dropwise adding device, ammonia water can be intermittently and uniformly sprayed into slurry when the pH value is adjusted, and the stirring speed is increased; the pH value at the moment is obtained through the detection of the stirring, mixing and detecting device, the ammonia water is in a non-adding state at the moment, when the pH value does not reach a specified value, the dropwise adding device continues to intermittently add the ammonia water, and when the pH value reaches the specified value, dropwise adding and detecting are stopped immediately, so that the detection is more accurate, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of the preparation of pseudo-boehmite powder, in particular to a hydrothermal treatment device and a method for the preparation of pseudo-boehmite powder with high peptization and macropore capacity. Background technique [0002] Pseudo-boehmite, also known as alumina monohydrate, pseudo-boehmite, is a non-toxic, tasteless, odorless, white powder that can be used as catalyst carrier, activated alumina and other aluminum salts. It is also used as a molding binder for molecular sieves, silicate refractory products, etc. Pseudo-boehmite has a network-like spatial structure, large voids, developed specific surface area, and thixotropy that becomes a viscous colloidal substance in an acidic environment, which makes the product have high crystal phase purity and peptizing properties. consumption, thixotropic gel and other characteristics. [0003] According to the existing CN103466669B, a method for hydrothermal...

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Problems solved by technology

[0004] The existing hydrothermal treatment devices for the preparation of high peptization macropore volume pseudo-thin water aluminum powder are mostly carried out in the reactor, but when the pH in the reactor is adjusted to 8-9, due to the large amount of solution in the reactor, dripping The rate of adding ammonia water is difficult to control, which often leads to the fact that after the pH at the detection position reaches the standard, the solutions at other positions have not been mixed evenly, resulting in the pH structure detected after a period of time is not the final structure after the reaction is complete, so that the pH that does not meet the standard The value solution affects the quality of the subsequent process. For this reason, we propose a water heat treatment device and method for preparing pseudo-thin water aluminum powder with high peptization and large pore volume.

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