Application of hydroxyaluminum montmorillonite in preparation of antacid
A hydroxyaluminum montmorillonite, antacid technology, applied in aluminum/calcium/magnesium active ingredients, digestive system, drug combination, etc.
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preparation example Construction
[0016] The application of the hydroxyaluminum montmorillonite of the present invention in the preparation of antacids, the preparation method of the antacids, the steps are as follows:
[0017] (1) Soak the montmorillonite clay in purified water for 1-2 hours under stirring, and then use a sand mill or colloid mill for liquid crushing to obtain a suspension; let it stand for 6-8 hours; remove the sedimentation liquid, and mix the upper layer The suspension was centrifuged in a decanter centrifuge, and the collected relative density was 2.0-2.2g / cm 3 After passing through a 120-160 mesh sieve, the feed liquid is acidified with a hydrochloric acid solution with a concentration of 1-3N, and the temperature of the acidification process is controlled at a temperature of 10-70°C; stir for 1-3 hours until the pH of the liquid is 1.5-3.5 Then separate with a centrifuge, and the filter cake is repeatedly washed with purified water until the pH value is neutral after washing; then, the ...
experiment example 1
[0038] Experimental example 1: Experimental research on the influence of time and concentration of montmorillonite in hydrochloric acid solution
[0039] Raw materials: montmorillonite, hydrochloric acid;
[0040] Add 5 pieces of 80mL 3N hydrochloric acid solution into the Erlenmeyer flask, cover it and place it in a shaker, keep the temperature at 70±2°C, and then add 1.0g of pure montmorillonite sample respectively. The capped bottle stopper was shaken at a constant temperature of 120r / min for a certain period of time (0h, 3h, 12h, 24h, 36h), and after taking it out, it was centrifuged with a desktop centrifuge (maximum speed 6000r / min), and the supernatant was taken and spectrophotometrically Determination of the concentration of aluminum ions in the dissolution solution and calculation of AL 2 o 3 Dissolution rate. AL 2 o 3 Dissolution rate of Al 2 o 3 The ratio of dissolved mass to initial mass. The residue after centrifugation was repeatedly washed with distilled...
experiment example 2
[0051] Experimental example 2: Activation experiment of montmorillonite in hydrochloric acid solution
[0052] Raw materials: montmorillonite, hydrochloric acid;
[0053] Weigh 5g of ground montmorillonite sample and pour it into a 250ml Erlenmeyer flask; add 200ml of hydrochloric acid (concentrations are 1.0N, 1.5N and 3.0N respectively), bathe in water at 70±2°C for 3h; filter and wash repeatedly with deionized water to pH ≈6, 1O0 ℃ drying after standby, XRD and SEM analysis of the sample after acid treatment.
[0054] (1) XRD analysis
[0055] The above montmorillonite treated with hydrochloric acid is consistent with the XRD patterns of montmorillonite activated without hydrochloric acid and with different concentrations of 1.0N, 1.5N, 3.0N hydrochloric acid;
[0056] Montmorillonite has a higher degree of crystallization and fewer active sites that can react with hydrochloric acid. After activation by hydrochloric acid, the activity was significantly improved, indicati...
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