Study on modification of HY catalyst with modifiers revealed that, every kind of modifier had a best content. HY modified with P_2O_5 had better properties than any other modified catalysts.

• 对改性HY分子筛催化剂研究表明 ,每种改性物均存在一个最佳含量 ,P2 O5改性后HY催化剂的性能最优越。