Important applications of alumina catalytic materials in petroleum refining and petrochemical industry

Catalytic reforming reaction

Currently, the most used are platinum-rhenium catalysts, followed by platinum-tin catalysts, both of which use chlorinated γ-alumina as the carrier.

Hydrogenation refining reaction

1Selective hydrogenation process, such as ethylene and propylene obtained by petroleum hydrocarbon cracking for use as polymer raw materials, must first undergo selective hydrogenation to remove alkynes, dienes, carbon monoxide, carbon dioxide, oxygen and other trace impurities without loss of alkenes. Catalysts are generally molybdenum-cobalt, molybdenum-nickel, tungsten-nickel catalysts, using γ-alumina or γ-alumina with a small amount of silica as the carrier;

2Non-selective hydrogenation catalyst, such as nickel-alumina catalyst for benzene hydrogenation to cyclohexane.

Oxidation reaction

1Such as silver catalyst for ethylene oxidation to ethylene oxide, using silicon carbide or α-alumina as the carrier;

2Oxidation of o-xylene to phthalic anhydride, using vanadium-titanium oxide as the active component, sprayed on silicon carbide or alumina to prepare the catalyst;

3Alcohol oxidation to aldehydes or ketones, such as methanol oxidation to formaldehyde using silver-kaolin (or alumina), iron oxide-molybdenum oxide and electrolytic silver catalysts;

4Ethylene, hydrogen chloride and air or oxygen to dichloroethane, using cuprous chloride-alumina catalyst.

Dehydration reaction

Alcohol dehydration such as dehydration of ethanol to ethylene using γ-alumina catalyst.