Process for preparing natural magnesium aluminium silicate gel

Abstract

A process for preparing natural gel of magnesium aluminium silicate from bentonite, attapulgite, bentone, etc includes such steps as pulverizing, preparing slurry, adding pour depressor, stirring, dynamic centrifugal separation, adding inorganic salt containing one-valence metal ions, stirring, pre-activating, adding organic salt containing at least Na ions, stirring for modifying, and post-treating.

Description

technical field [0001] The invention relates to a method for preparing inorganic gel, in particular to a method for preparing natural magnesium-aluminum silicate gel by using clay minerals containing magnesium-aluminum components as raw materials. Background technique [0002] Natural magnesium aluminum silicate gel is a purified and modified mineral gel material obtained from clay minerals containing magnesium and aluminum components through purification, purification, modification and other processes. This mineral gel material has an amazing expansion ability in water, and can form a gel with a house-of-card structure. It becomes thin under action and has good fluidity. It is an excellent viscosity regulator, thickener, suspending agent, emulsion stabilizer, and fluid thixotropy regulator. It is widely used in daily chemicals, pharmaceuticals, building materials, paints, petroleum, etc. Industries such as drilling, rubber and precision casting. ...

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned results have achieved preliminary results in exploring the preparation technology of natural magnesium aluminum silicate gel, from the perspective of practical application, there are still following defects: 1, because the third step adopts natural sedimentation method (or gravity method) in Purify the mineral particles in the pulp in a static state, and the operating concentration is strictly limited. In other words, the concentration of the pulp must be lower than the solid-liquid ratio of 1:10, that is, the concentration by weight must be lower than 9%, otherwise the pulp will be affected by the concentration. Too high and too high viscosity lead to poor purification effect

Moreover, the purification process of natural sedimentation method is slow, generally takes 14 to 16 hours, and the production efficiency is extremely low

2. In the second step, if a viscosity reducer is used, the viscosity and colloidal properties of the final product will be greatly reduced. If the viscosity reducer is not used, the dispersion effect of the pulp will be poor, which will greatly reduce the purification and separation effect. Do not dare to use viscosity reducer or strictly control the dosage during the purification process, which leads to insufficient dispersion of pulp, which also leads to poor purification effect and low purification degree of target minerals in the product, which directly affects the application range of the product

3. Due to the low degree of mineral purification and the simple modification process, the quality of the final gel product is poor. The gel viscosity of its 5% aqueous dispersion is only 40-60 mPa·s, and the thixotropy value is only 1.3- 1.4, and the stability of the gel is poor

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