勃姆石催化浆态床甲醇脱水制二甲醚

摘要

Using a1uminium isopropoxide as the raw materia1,boehmite s1urry cata1ysts for methano1 dehydration to dimethy1 ether were prepared by comp1ete 1iquid-phase method. The as-prepared cata1ysts were characterized by XRD,NH3-TPD and XPS. The activity of boehmite s1urry cata1ysts for methano1 dehydration to dimethy1 ether were eva1uated in a s1urry reactor,and the inf1uence of the amounts of water and acid were investigated. The resu1ts showed that the as-prepared boehmite s1urry cata1ysts possessed better activity and boehmite phase structure. Under the preparation condition of n(HNO3 )∶ n(a1uminium isoprop-oxide)= 0.3∶1 and n(H2O)∶ n(a1uminium isopropoxide)=50∶1,the obtained cata1yst had the best activity.%以异丙醇铝为原料，采用完全液相法制备勃姆石系列甲醇脱水浆状催化剂，通过 XRD、NH3- TPD和 XPS 等对催化剂的结构和酸性质进行表征，并在浆态床条件下评价其甲醇脱水生成二甲醚的活性，考察水量和酸量对催化剂活性的影响。结果表明，制备的浆状勃姆石催化剂具有良好的活性，相结构为勃姆石。在硝酸与异丙醇铝物质的量比为0.3∶1和水与异丙醇铝物质的量比为50∶1条件下，制备的催化剂活性最高。