Catalyst for hydrogenation of C4 superposition product and preparation method of catalyst

Abstract

The invention relates to a catalyst for hydrogenation of a C4 superposition product and a preparation method of the catalyst. The catalyst is prepared from the following components in percentage by mass: 40 to 80 weight percent of gamma aluminum oxide, 0.5 to 40 weight percent of nickel oxide, 1 to 10 weight percent of lanthanum oxide, 0.1 to 6 weight percent of magnesium oxide and 0.1 to 6 weight percent of titanium dioxide, wherein the gamma aluminum oxide is a carrier, the magnesium element, the titanium element and the lanthanum element are assistants, and the nickel element is an active component. After the Ti modified alumina carrier is introduced, interaction between the surface of the carrier and the metal active component Ni is enhanced, and the dispersion degree is obviously improved; due to the introduction of Mg, olefin polymerization is reduced, and the anti-coking performance of the catalyst is improved; by adding lanthanum, nickel grains become smaller, the contact area with nickel oxide is increased, the grains become smaller, lattice defects, dislocation and the like generated in the recombination process a re avoided, the reduction temperature of the catalyst is reduced, and meanwhile improvement of the activity of the catalyst is promoted.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a catalyst used for hydrogenation of carbon four stack products and a preparation method thereof. Background technique [0002] my country is rich in C4 resources. In the petrochemical industry, the production capacity of refining and chemical industries such as naphtha cracking to ethylene has been greatly improved, resulting in a large amount of by-product C4. At present, the domestic utilization of C4 hydrocarbons is mainly concentrated in the production of gasoline blending components of automotive oils such as alkylate oil and methyl tert-butyl ether (MTBE). harm. In 2017, the state promulgated two standards, GB 18351 "Ethanol Gasoline for Vehicles (E10)" and GB 22030 "Ethanol Gasoline Blending Component Oil for Vehicles", stipulating that no other organic oxygen compounds should be added to ethanol gasoline for vehicles, which means MTBE will not be used as a gasoline blending co...

AI Technical Summary

Problems solved by technology

[0006] CN106732620A discloses a nickel-based hydrogenation catalyst and its preparation method. It takes nickel-containing alumina as a carrier, impregnates the nickel-containing alumina carrier with a nickel-containing solution, and makes it through drying and roasting. The synthesis of diaspore is relatively complicated

[0007] However, the current hydrogenation reaction conditions are related to the catalysts used. Using platinum, palladium, rhodium and other precious metal catalysts, the reaction can be carried out under mild conditions, and the hydrogen gas does not need to be circulated once. The equipment investment and operating costs are relatively low, but the catalyst more expensive

At present, non-noble metal nickel-based catalysts are commonly used in the hydrogenation process of superimposed products. However, the use of nickel-based catalysts requires higher temperature and pressure, and at the same time consumes more hydrogen and has a shorter service life.

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