Preparation method of supported nickel-based catalyst and application of catalyst in catalytic hydrogenation of C5/C9 petroleum resin

Abstract

The invention discloses a supported nickel-based catalyst, a preparation method thereof, and an application of the catalyst in catalytic hydrogenation of C5 / C9 petroleum resin. The catalyst is a mesoporous hollow nanosphere catalyst Ni-M-SiO2 prepared by taking SiO2 as a carrier, taking Ni as a main active metal center, and adding an assistant metal M (M=Cu / Co / Mg). The prepared catalyst has a relatively large specific surface area, the particle size of active metal particles is small, dispersion is uniform, the binding force with the carrier is strong, and loss and agglomeration do not occur easily in a reaction process. When being applied to a hydrogenation reaction of C5 / C9 petroleum resin, the catalyst not only has relatively high catalytic hydrogenation activity and decoloring performance, but also can effectively inhibit great reduction of the softening point, and is suitable for preparing high-quality hydrogenated petroleum resin. The obtained product is low in bromine price (smaller than 1.2 g Br2 / 100 g), small in color scale (Gardner color scale smaller than 0.6), and is high in softening point (larger than 84 DEG C).

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a supported nickel-based catalyst and its preparation and application in catalytic hydrogenation of C5 / C9 petroleum resins. 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 doub...

AI Technical Summary

Problems solved by technology

Patent CN 104941649A adopts the traditional impregnation method to prepare Ni-SiO with a nickel loading of 30-50 wt.%. 2 Supported catalyst, the softening point of hydrogenated petroleum resin decreases slightly, but the bromine price is higher (>1 gBr 2 / 100 g), because the traditional impregnation method to prepare high-loaded catalysts is likely to cause uneven distribution of nickel active components, and the phenomenon that nickel active components are larger due to aggregation, resulting in the inability of some active centers to play their catalytic role

Liu Weixing et al. (“Ni / SiO 2 The influence of catalyst preparation conditions on the catalytic hydrogenation reaction performance of C5 resin", "China Petroleum and Chemical Standards and Quality", 2014, 2, 31-31.) Ni / SiO prepared by co-precipitation method 2 The active components of the catalyst are evenly dispersed, but the overall structure is compact, the external specific surface area is small, and the number of pores is less exposed, which limits the contact between the reactant molecules and the active center, resulting in a low degree of hydrogenation of the unsaturated hydrocarbon bonds of the petroleum resin.

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