【摘要】 采用等体积浸渍法、不同的浸渍次序制备了二元改性P-Mo/Hβ分子筛活性组分;在连续小型固定床反应器上醇烯摩尔比1.05条件下,考察了P-Mo/Hβ在挤条成型过程中各因素对其醚化性能的影响以及β沸石成型后再浸渍的催化剂活性。结果表明同步浸渍法均比分步浸渍法改性效果好;添加扩孔剂(PEG)有利于增大催化剂比表面积,PEG的不同种类和用量、HNO3用量对催化剂醚化活性影响很大,γ-Al2O3用量影响不显著;通过比较,最佳的工艺成型条件为10%PEG-4000,20%γ-Al2O3,10%浓HNO3。P-Mo/Hβ挤条成型经水热稳定化后,70℃时总叔碳烯烃转换率达54.33%,接近树脂水平,且有良好的再生性。更多还原

【Abstract】 An etherification catalyst P - Mo/Hβ was prepared and the influence of the preparation factors (pore- expanding agent PEG, peptizing agent HNO3,binder γ- Al2 O3 and hydrothermal treatment) on etherification performance of the catalyst were investigated in a continuous fixed - bed reactor with methanol to tert - olefins molar ratio 1. 05. It was shown that impregnating - meanwhile was superior to impregnating-respectively. The appropriate addition of PEG could effectively increase surface area of the catalyst. Addition of PEG and HNO3 and hydrothermal treatment had significantly affected the etherification activity while RRRR - Al2O3 reversely. By comparison , the optimal shaping condition was PEG - 4000 (10% ) ,γ- Al2O3 ( 20% ) , HNO3 ( 10% ) and after hy-drothermal treatment the total conversion of tert - olefins was up to 54. 33% at 70℃, which was comparable with resin catalyst, and the shaped catalyst had good regeneration.更多还原