Modified catalyst supports
a technology of catalyst support and modified catalyst, which is applied in the direction of physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, metal/metal-oxide/metal-hydroxide catalyst, etc., can solve the problems of significant collision and frictional force, and attrition of catalyst and/or catalyst support. , to achieve the effect of increasing the operating cost of the catalys
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example 1
Preparation of Catalyst Sample I
[0040]MSA reagent solution was prepared with 94.9 g TEOS rapidly added to 4 L of acidified-demineralized water under vigorous stirring. Sufficient HNO3 was added to the water to bring the pH to between 2.2 and 2.5 and held between 3° C. and 8° C. 15 minutes after TEOS addition, an aliquot was removed and the rate of color change tested. Greater than 90% of the full color developed within 5 minutes. In a separate stirred, heated vessel, a slurry of the alumina support containing 640 g alumina suspended in 2 L of demineralized water was heated. The slurry was held at 50°±5° C. throughout the addition of the MSA reagent, which was added at a rate of 35 ml / min. Following completion of the MSA addition, the slurry was stirred and kept at 50°±5° C. until >95% of the silicon Was reacted with the alumina. Once reaction was complete, stirring was stopped, the solids allowed to settle, and the clear mother liquor decanted from the vessel. The remaining dense sl...
example 2
Preparation of Catalyst Sample 2
[0042]MSA reagent solution was prepared with 73.6 g TEOS rapidly added to 667 ml of acidified demineralized water under vigorous stirring. Sufficient HNO3 was added to the water to bring the pH to between 2.2 and 2.5 and held between 3° C. and 8° C. 15 minutes after TEOS addition, an aliquot was removed and the rate of color change tested. Greater than 90% of the full color developed within 5 minutes. In a separate stirred, heated vessel, a slurry of the alumina support containing 10 g alumina suspended in 333 ml of demineralized water was heated. The slurry was held at 50°±50° C. throughout the addition of the MSA reagent, which was added at a rate of 5 ml / min. Following completion of the MSA addition, the slurry was stirred and kept at 50°±5° C. until >95% of the silicon was reacted with the alumina. Once reaction was complete, stirring was stopped, the solids allowed to settle, and the clear mother liquor decanted from the vessel. The remaining den...
example 3
Preparation of Catalyst Sample 3
[0044]MSA reagent solution was prepared with 94.9 g TEOS rapidly added to 4 L of acidified demineralized water under vigorous stirring. Sufficient HNO3 was added to the water to bring the pH to between 2.2 and 2.5 and held between 3° C. and 8° C. 15 minutes after TEOS addition, an aliquot was removed and the rate of color change tested. Greater than 90% of the full color developed within 5 minutes. A slurry of the alumina support containing 640 g alumina suspended in 2 L of demineralized water was added to the MSA. The mixture was then heated to 50°±5° C. The mixture was stirred and kept at 50°±5° C. until >95% of the silicon was reacted with the alumina. Once reaction was complete, stirring was stopped, the solids allowed to settle, and the clear mother liquor decanted from the vessel. The remaining dense slurry was vacuum filtered to remove the remainder of the solution. The filtered solid was spread onto a drying tray to a thickness less than 1.5 c...
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