C9　petroleum　resin　(C9PR)　is　a　thermoplastic　resin　polymerized　from　the　C9　fraction　of　ethylene　cracking　byproduct.　After　hydrogenation　modification,　it　can　be　used　to　obtain　high-value-added　hydrogenated　petroleum　resin　(HC9PR)　with　light　color,　high　antioxidant　stability　and　good　compatibility.　However,　C9PR　has　high　molecular　weight,　high　steric　hindrance　and　impurities　such　as　sulfide　in　the　raw　materials　which　are　easy　to　poison　and　deactivate　the　catalyst,　making　hydrogenation　extremely　difficult.　Herein,　in　order　to　achieve　simultaneous　hydrogenation　and　desulfurization　of　C9PR,　we　have　successfully　prepared　the　amorphous　NiP@γ-Al2O3catalyst　by　using　chemical　reduction　method　combined　with　ball　milling　method.　The　results　showed　that　the　catalyst　has　large　specific　surface　area,　high-content　Niδ+　active　species,　high　number　of　active　sites　and　strong　adsorption　capacity　for　C==C　bond.　The　obtained　amorphous　NiP@γ-Al2O3　catalyst　showed　an　enhanced　hydrogenation　activity　(hydrogenation　degree　of　98.35%)　and　desulfurization　activity　(sulfur　content　reduced　from　122.80　μg/g　to　8.00　μg/g)　for　C9PR　hydrogenation,　which　is　obviously　superior　to　different　crystalline　nickel　phosphide　catalysts　(the　nickel　phosphide　was　prepared　by　temperature　programmed　reduction　method　and　loaded　on　γ-alumina　carrier　by　ball　milling).　In　addition,　the　amorphous　NiP@γ　-Al2O3　catalyst　exhibited　high　hydrogenation　degree　after　100　h　of　continuous　reaction,　indicating　that　the　catalyst　had　good　stability.　©　2024　Materials　China.　All　rights　reserved.