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１ 前 言４８１－２Ｂ型催化剂是石蜡加氢补充精制专用催化剂，北京燕山石油化工公司石蜡加氢装置应用它来加工熔点为５６～６４℃的石蜡。经过十几年的长期生产实践发现，４８１－２Ｂ型催化剂反应活性好，对不同原料石蜡的适应性较强，但可操作的温度范围较窄（２６０～３
1 Introduction 481-2B-type catalyst is paraffin hydrotreating dedicated catalyst, Beijing Yanshan Petrochemical Company paraffin hydrogenation unit to process it to process the melting point of 56 ~ 64 ℃ paraffin. After more than 10 years of long-term production practice found that 481-2B type catalyst reactivity good paraffin wax for different adaptability, but the operable temperature range is narrow (260 ~ 3