Why Aluminum Silica Gel Used as Melamine Catalyst
Issuing time:2023-01-06 14:04
The main advantage of aluminum silica gel is that its chemical properties are relatively stable. It is an acid oxide and does not react with ordinary acids. It does not react with halogens, hydrogen halides, sulfuric acid, nitric acid and perchloric acid (except hot concentrated phosphoric acid) other than fluorocarbon and hydrogen fluoride. The catalyst will be poisoned if it reacts with the catalyst. The activity and selectivity of the catalyst are obviously reduced or lost due to the trace impurities contained in the reaction raw materials. The essence of poisoning is a chemical reaction between trace impurities and the active center of the catalyst, forming inactive species.
Secondly, aluminum silica gel has the properties of good abrasion resistance, stable chemical properties and high melting point. Therefore, the material with it as the main mineral phase is used as the catalyst carrier, and its performance is stable.
In addition, the treated dioxygenated silicon has a high specific surface area and strong adsorption, which can increase the catalytic efficiency of the catalyst!
In general, alumina silica gel catalyst has great advantages in terms of catalytic efficiency, catalytic activity, catalyst load firmness, service life, price, etc