Synthetic organoclay materials
A technology of organoclay and clay, applied in the field of sites, can solve the problems of purity and composition change, and achieve the effect of optimized peeling performance and reliable preparation
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[0061] Add water to 300 grams of water glass solution (27wt% SiO 2 ) until the volume is 2.5 liters. Add 300 g of Zn(NO 3 ) 2 ·6H 2 O and urea (3.3 L volume), adjust the pH to about 1.5 with concentrated nitric acid. The solution was added to a stirred stainless steel reactor equipped with baffles and heated to 65-70°C. A hot solution of acidified dimethyloctadecylamine (using 25 ml of concentrated nitric acid to obtain a roughly clear solution, ACROS, 87% 90 g in 1 liter) was poured into the above solution. The mixture was heated to 90 °C and stirred at 500 rpm for 16-20 h. After washing and drying, a white fine powder is obtained, which is hydrophobic. Yield 230-250g.
[0062] Table 1 lists the elemental analysis calculation results for two experimental grade products with different amounts of octadecylamine. Several conclusions can be drawn from these data: Because of the lack of Zn for charge compensation in the interlayer 2+ , thus the Zn / Si ratio decreases. Dim...
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