Method for improving hard water resistance of magnesium aluminum silicateinorganic gel

Abstract

The invention discloses a method for improving hard water resistance of magnesium aluminum silicate inorganic gel. The method comprises steps as follows: (1) adding a modifier to a powdered magnesium aluminum silicate inorganic gel, wherein the modifier is selected from one or more of sodium carbonate, sodium fluoride, sodium phosphate, sodium oxalate, sodium citrate and sodium ethylene diaminetetraacetic acid; (2) after full stirring, heating the gel to the temperature of 30-80 DEG C for 5-20 min while stirring; (3) cooling the gel to the room temperature to obtain the modified magnesium aluminum silicate product. A 1% standard hard water dispersion system is prepared fromthe modified inorganic gel product prepared with the method, and the precipitation quantity of clear water is obviously reduced or even no clear water is precipitatedafter the system is left to stand for 24 h, so that the gel has excellent suspension property in the hard water system, and the problem that existing magnesium aluminum silicate inorganic gel cannot be applied to hard water is solved.

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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