Modified smectite and method for producing the same and its application
A montmorillonite and modified technology, which is applied in chemical instruments and methods, pharmaceutical formulas, inorganic active ingredients, etc., can solve the problems of no treatment for chronic atrophic gastritis and no treatment for chronic atrophic gastritis reversal
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Embodiment 1
[0248] Example 1 Preparation of modified montmorillonite
[0249] Phase analysis of purified montmorillonite, see figure 1 .
[0250] In purifying montmorillonite, add 2mol / L mixed acid, the composition of mixed acid is (the molar ratio of hydrochloric acid: oxalic acid: acetic acid is 4:10:6), mix with soil: the mass ratio of acid is 1:3 , boiled at 100°C for 5-6 hours, filtered to remove the mixed acid, washed the filter cake with deionized water to pH≧4, dried at 100°C, and crushed into 300-500 meshes to obtain the modified calcium-based montmorillonite Delithification, its abundance or phase analysis see figure 2 .
[0251] Prepare the obtained modified calcium-based montmorillonite with 0.5N hydrochloric acid solution to make a slurry with a solid content of 20%, stir for 6 hours, filter to remove the acid solution, wash the filter cake with hot water at 60°C until the pH is about 5, press Filter into a filter cake with a solid content of about 50%, add sodium car...
Embodiment 2
[0252] Example 2 Preparation of modified montmorillonite
[0253] Phase analysis of purified montmorillonite, see Figure 4 .
[0254] In the purification of montmorillonite, add a mixed acid with a concentration of 1mol / L, the composition of the mixed acid is (the molar ratio of hydrochloric acid: oxalic acid: acetic acid is 3:4:3), and the mass ratio of soil: acid is 1:4. Mix, boil at 90°C for 6-8 hours, filter to remove the mixed acid, wash the filter cake with deionized water to pH≧4, dry at 120°C, and grind it into 300-500 mesh to obtain the modified calcium base Montmorillonite, its abundance or phase analysis see Figure 5 .
[0255] The obtained modified calcium-based montmorillonite was mixed with 0.5N sulfuric acid solution to make a slurry with a solid content of 15%, stirred for 6 hours, filtered to remove the acid solution, and the filter cake was washed with hot water at 70°C until the pH was about 5.5. Pressure filtration into a filter cake with a solid c...
Embodiment 3
[0256] Example 3 Preparation of modified montmorillonite
[0257] Mineral composition of raw bentonite: see Figure 7 .
[0258] The raw ore is dried, crushed, passed through a 50-mesh sieve, added water and 0.3% sodium hexametaphosphate of raw ore powder to form a slurry with a solid content of 20%, stirred for two hours, passed through a three-stage hydrocyclone, and separated and removed Coarse sand can be separated into slurry; the separated slurry is adjusted to a thin slurry with a solid content of 3% by adding water, which is separated into a disc centrifuge, and the separated thin slurry is then concentrated in another disc centrifuge, and the concentrated slurry is passed through Plate and frame filter press to obtain a filter cake with a solid content of 40-50%. The filter cake is dried at 125°C and crushed to a size above 500 mesh. For the mineral composition of purified montmorillonite, see Figure 8 .
[0259] In purifying montmorillonite, add the mixed acid...
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