Nickel-based catalyst used for preparation of hydrogenated petroleum resin as well as preparation method and application of catalyst

Abstract

The invention discloses a nickel-based catalyst used for preparation of hydrogenated petroleum resin as well as a preparation method and application of the catalyst. The method comprises the followingsteps: preparing carbonate radical intercalated NiMgAl-M-LDH (M=La or Cu) quaternary hydrotalcite by adopting a urea hydrolysis method, performing high-temperature calcination, and performing reduction in a reducing atmosphere to obtain the nickel-based catalyst having a high specific surface area and a highly-dispersed active center. According to the catalyst synthesized by the method, auxiliaryagent metal element La or Cu is doped, so that the acidity of the surface of the catalyst can be effectively neutralized, inhibition of hydrodegradation of petroleum resin is facilitated, the softening point of the hydrogenated product is improved, dispersity of the active center Ni can be effectively increased, and deep hydrogenation of unsaturated hydrocarbon bonds in the petroleum resin can bepromoted; and the catalyst has a simple and easy synthetic method, low preparation costs, a simple hydrogenation process and easy industrialization, and when the obtained catalyst is used for hydrogenation of the petroleum resin, the hydrogenated petroleum resin having a water white color and a high softening point can be prepared.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a nickel-based catalyst used for the preparation of hydrogenated petroleum resin, a preparation method and application thereof. Background technique [0002] Petroleum resin is a kind of thermoplastic resin produced by polymerizing the by-product distillate oil in the cracking ethylene production process. It is widely used in coatings, rubber additives, printing and other industries, but at the same time, petroleum resin contains A large number of impurities such as unsaturated hydrocarbon bonds and halogen elements make petroleum resins have disadvantages such as dark hue, pungent smell, poor adhesion, light and thermal stability, and poor oxidation stability, which limits its application in high-precision fields. [0003] Hydrogenated petroleum resin is a special material with excellent performance obtained by catalytic hydrogenation of unsaturated C=C ...

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Problems solved by technology

[0005] Although palladium-based catalysts have high catalytic hydrogenation activity for petroleum resins and can effectively inhibit the hydrogenation degradation of petroleum resins, they are sensitive to sulfur-containing compounds in petroleum resins and are easily poisoned, resulting in irreversible deactivation. higher

Patent CN 103386302A discloses a petroleum resin hydrogenation catalyst, which uses γ-Al 2 o 3 As a carrier, supporting noble metal Pd and oxide promoters, the metal Pd crystallites with a particle size of less than 3 nm in the obtained catalyst account for more than 90%, but its disadvantage is that the catalytically active metal Pd has a great influence on the impurity S 2- / Cl - Poor tolerance, easy poisoning and deactivation, catalyst life is affected

[0008] The nickel-diatomite supported catalyst prepared by the impregnation method reported in the patent US 3040009 is used in the hydrogenation reaction of C5 petroleum resin. After reacting for 5-7 h, the bromine value of the obtained hydrogenated petroleum resin is 1-3 gBr 2 / 100g, its disadvantage is that the preparation of high-loaded active metals by traditional impregnation method is easy to cause the aggregation of active components, and it is easy to sinter at high temperature, which reduces the hydrogenation activity of the catalyst

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