| Physical and Chemical Properties | Chemical properties: dark brown microspheres, catalyst particle size distribution:<45 μm 25% ~ 45% (mass),> 88 μm 5% ~ 25% (mass), <0.8mm 100% (mass), bulk density 880~1000kg/m3, specific surface about 180 m2/g, pore volume about 0.6 cm3/g, wear rate <2.0% (mass). Catalytic activity: weight yield of isophthalonitrile> 88%. Evaluation conditions: temperature 400~430 ℃, pressure about 0.04MPa, raw material ratio of m-xylene: ammonia: air = 1 ∶(6~8)∶(30~41)(molar ratio), catalyst load m-xylene 40~70g/(L h). |