A method for improving the hard water resistance of magnesium aluminum silicate inorganic gel

Abstract

The invention discloses a method for improving the hard water resistance of magnesium aluminum silicate inorganic gel, which comprises the following steps: (1) adding a modifier to powdery magnesium aluminum silicate inorganic gel; the modifier is selected from One or more of sodium carbonate, sodium fluoride, sodium phosphate, sodium oxalate, sodium citrate and sodium edetate; (2) After fully stirring, heat up to 30~80°C while stirring, and keep for 5 ~20min; (3) Cool to room temperature to obtain the modified magnesium aluminum silicate product. The modified inorganic gel product prepared by the inventive method is made into a 1% standard hard water dispersion system, and the amount of clear water precipitation after standing still for 24 hours is significantly reduced, or even no clear water precipitation, indicating that it has excellent suspension performance in hard water systems , which solves the problem that the existing magnesium aluminum silicate inorganic gel cannot be applied in hard water.

Description

technical field [0001] The invention relates to a method for improving the hard water resistance of magnesium aluminum silicate inorganic gel. Background technique [0002] In the prior art, magnesium aluminum silicate inorganic gel is a kind of clay mineral containing magnesium aluminum silicate as raw material, such as smectite, bentonite, bentonite, etc., after raw material crushing, pulping, separation and purification, gelatin The natural inorganic gel product with a certain purity is obtained through processes such as melting and drying. [0003] Qiu Jun et al. disclosed "Preparation of High Performance Montmorillonite Inorganic Mineral Gel" in the 6th issue of "Chemical Minerals and Processing" in 2007. In this paper, a montmorillonite inorganic mineral gel with excellent performance was prepared by using a purified calcium-based bentonite in Shandong as raw material through sodium, phosphating and gelation processes. [0004] Chinese invention patent application CN...

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Problems solved by technology

However, the interlayer Na of magnesium aluminum silicate inorganic gel + Possesses cation exchangeability and is readily absorbed by Ca, which is common in water 2+ , Mg 2+ The exchange of cations causes the network structure of the "card palace" to collapse, resulting in the phenomenon of stratification and water separation in the aqueous solution dispersion system, resulting in a significant decline in the functions of thixotropy, thickening, and suspension assistance of the gel product. , thus limiting the magnesium aluminum silicate inorganic gel in hard water system (mainly containing Ca 2+ , Mg 2 + cation) applications in

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