Aluminum-nickel catalyst, commonly known as Raney nickel, is widely used in hydrogenation reactions, particularly in the chemical, pharmaceutical, and food industries. It is highly effective in converting unsaturated hydrocarbons, such as alkenes and alkynes, into saturated hydrocarbons (alkanes) by adding hydrogen. This catalyst is also employed in the production of fine chemicals, pharmaceuticals, and specialty chemicals where selective hydrogenation is required. Additionally, it is used in the hydrogenation of vegetable oils to produce solid fats like margarine and in the hydrotreating of petroleum products to remove impurities and improve fuel quality. Its activity, selectivity, and stability make it a preferred choice for hydrogenation processes under moderate to high temperatures and pressures.