▎ 摘　　要

NOVELTY - Preparing carbon material coated nickel nano particle catalyst involves weighing certain mass of nickel salt and organic ligand into alcohol solvent to dissolve and stirring for 3-24 hours at 0-50degrees Celsius to obtain mixed solution; dropping alkali liquor in mixed solution, adjusting pH value of solution in three stages specifically as followed by firstly using 0.1 to 5 mol/L sodium hydroxide aqueous solution to adjust pH value to 4.0-5.5, keeping for 0.5 to 3 hours, using 80-99 % of triethanolamine water solution to adjust pH value to 6.5-7.5, keeping for 1-5 hours, adjusting pH value to 8.5-9.5 with 25-28 % of ammonia water, keeping for 1-3 hours in adjusting process, where mixed solution is always in stirring state; sealing slurry, placing on vibration platform for crystallization, depositing, aging, then filtering and washing, vacuum drying to obtain metal organic frame precursor where vibration program is set as 1. USE - Method for preparing carbon material coated nickel nano-particle catalyst used in halogenated aniline of formula (I) for catalytic hydrogenation synthesis of halogenated aniline of formula (II) (claimed). ADVANTAGE - The method enables to effectively control precursor shape on basis of improving metal utilization rate to obtain catalyst with specific micro-structure, effectively improves selectivity of product. DETAILED DESCRIPTION - Preparing carbon material coated nickel nano particle catalyst involves weighing certain mass of nickel salt and organic ligand into alcohol solvent to dissolve and stirring for 3-24 hours at 0-50degrees Celsius to obtain mixed solution; dropping alkali liquor in mixed solution, adjusting pH value of solution in three stages specifically as followed by firstly using 0.1 to 5 mol/L sodium hydroxide aqueous solution to adjust pH value to 4.0-5.5, keeping for 0.5 to 3 hours, using 80-99 % of triethanolamine water solution to adjust pH value to 6.5-7.5, keeping for 1-5 hours, adjusting pH value to 8.5-9.5 with 25-28 % of ammonia water, keeping for 1-3 hours in adjusting process, where mixed solution is always in stirring state; sealing slurry, placing on vibration platform for crystallization, depositing, aging, then filtering and washing, vacuum drying to obtain metal organic frame precursor where vibration program is set as 1, vibration frequency is 10-20 hertz (Hz), transverse amplitude vibration is 1-5 minutes, vibration frequency is 20-40 Hz and transverse amplitude is vibrated for 1-5 minutes, vibration frequency is 40-55 Hz, transverse amplitude is vibrated for 1-5 minutes; running program 1-3 is vibration period, where whole crystallization precipitation aging process is 10-20 hours, interval 1-2 hours, running vibration period; placing precursor in agate mortar for crushing and grinding, roasting for 5-24 hours at 300-800degrees Celsius, cooling to room temperature and grinding to obtain carbon material coated nickel nano particle catalyst, where roasting atmosphere is inert atmosphere or carbon dioxide atmosphere contains carbon dioxide. INDEPENDENT CLAIMS are also included for: (1) a carbon material coated nickel nano particle catalyst, which is prepared by above preparation method; (2) a application of carbon material coated nickel nano-particle catalyst, which is provided in halogenated aniline of formula (I) for catalytic hydrogenation synthesis of halogenated aniline of formula (II), where application is not needed to add dehalogenation inhibitor, where Rn represents n substituents on benzene ring where n= 0,1,2,3 or 4; each substituent R is 1-3C alkyl, Xm represents m halogen substituents on benzene ring, where m is 1-5, each halogen substituent is independent m + n is not more than 5.