To Learn The Usages Of Alumina Bulk Packing in Jumbo Bags From Chalco

Chalco Alumina, also known as aluminum oxide, commonly known as bauxite, corundum, and aluminum oxide, is a white powder that is insoluble in water. There are many synthesis methods of alumina, the common ones are acid method, alkali method and aluminum alkoxide method. In addition, it can also be obtained by dehydrating aluminum hydroxide at high temperature. So what is the use of alumina after it is made? Let's take a look at the role of alumina.  

The main purpose or usages as following:

1. Used as catalyst and catalyst carrier, it is the main catalyst and carrier in petroleum refining and petrochemical industry. It is also used as a dehumidifying agent for air and other gases, and a deacidifying agent for transformer oil and turbine oil.

2. Industrial high-temperature furnaces such as heating furnaces and soaking furnaces for forging. Can be used as sealing material and filling material. It can also be used as reinforcing fiber for strengthening, furnace lining, calcining furnace for electronic components (IC board, ferrite), etc.

3. Alumina fiber is mainly used for high temperature thermal insulation materials and reinforced composite materials. Alumina short fibers have outstanding high temperature resistance, and can be compounded with resins, metals or ceramics to prepare high-performance composite materials, and to manufacture industrial high-temperature furnaces such as heating furnaces, kiln linings and electronic component calciners. due to its low density. It has good thermal insulation and small heat capacity, which can not only reduce the quality of the furnace body, but also improve the temperature control accuracy, and the energy saving effect is remarkable. The energy saving effect of alumina fiber in high temperature furnace is better than that of general refractory brick or high temperature coating. When it is used to reinforce metal, it has no chemical effect with metal at all, and has good corrosion resistance, so alumina fiber is the reinforcing fiber of metal. It can also be used to weave non-woven fabrics, woven belts, ropes and other fiber products of various shapes.

4. It is used in the manufacture of industrial high-temperature furnaces such as heating furnaces and soaking furnaces. Used as sealing material, filler material, reinforcing fiber for FRM, furnace lining and calciner of electronic components (IC substrate, ferrite), etc.

5. Mainly used as chemical fiber filler, also used in cosmetic abrasive cream, toothpaste friction agent, metallurgy and chemicals.

6. Preparation of analytical reagents, dehydration adsorbents for organic solvents, abrasives, and low melting point lead glass.

7. Alumina is one of the most commonly used packing materials in chromatography, with acid, basic and neutral. It is a reagent capable of catalytic dehydration, elimination, addition, condensation, epoxide ring-opening, oxidation and reduction reactions. The reaction conditions are usually milder and more selective for homogeneous reactions.

8. Addition and condensation reactions Whether it is an electrophilic reaction or a nucleophilic reaction, alumina can promote the addition reaction of various heteroatoms. Alumina also enables intramolecular addition of hydroxyl and alkoxy groups to form the corresponding alkenes. Under the action of alumina, the aldol condensation reaction, Michael reaction and Wittig reaction between aldehydes and methylene compounds with different activities are often carried out under solvent-free and mild conditions. The cyclization of nitroaldol to the 2-oxide of 2-isoxazoline has good stereoselectivity.

9. Alumina favors reactions controlled by orbital symmetry, such as Diels-Alder reactions, olefin reactions, and Carroll rearrangements. These reaction conditions are mild and highly stereoselective. Under the action of Al2O3, S can more easily undergo nucleophilic addition reaction with propylene oxide, and then dehydrate to form alkene.

10. Alumina catalyzes many rearrangement reactions. Active aluminas undergo Beckmann rearrangement of O-sulfonyl oximes to the expected amides, while basic aluminas give the corresponding oxazolines. Under the action of alumina, β,γ-unsaturated ketones can be isomerized into conjugated ketones, alkynes into olefins, and olefins into conjugated dienols. Alumina promotes primary alcohol acetate hydrolysis, imide deacylation, sulfonyl oxime hydrolysis, and β-ketoester and carbamate dealkoxycarbonylation