丙烯氧化制丙烯酸催化剂在万吨级工业装置上的应用

采用XRD和BET等手段对自制丙烯氧化制丙烯酸催化剂进行了表征;对该催化剂进行了小试、模试和10 kt/a工业装置评价。试验结果表明,一段催化剂主要为CoMO4,Bi2Mo3O12,Bi2MoO6,FeMoO4,Co6Mo12Bi1.5Ox的晶相;二段催化剂主要为MoO3,Mo5O14,(Sb2O)M6O18(M=Mo,W,V)氧化物的晶相。小试评价结果为一段催化剂平均丙烯转化率98.1%、丙烯醛和丙烯酸总收率92.3%、氧化碳总收率3.4%,二段催化剂平均丙烯醛转化率99.7%、丙烯酸收率97.9%、氧化碳收率1.6%;一段和二段催化剂串联后,其模试评价的丙烯酸收率为88.8%,工业装置上运行时丙烯酸收率为88.9%。

Industrial Application of the Catalyst for Oxidation of Prolylene to Acrylic Acid

The catalysts were characterized by means of XRD and BET,and their catalytic performance for oxidation of propylene to acrylic acid was evaluated through bench scale test,pilot scale test and 10 kt/a industrial test.The results showed that crystal phases of the first stage catalysts included CoMoO4,Bi2Mo3O12,Bi2MoO6,FeMoO4 and Co6Mo12Bi1.5Ox,and crystal phases of the second stage catalysts included MoO3,Mo5O14 and(Sb2O) M6O18(M=Mo,W,V).The bench scale test indicated 98.1% propylene conversion,92.3% total yield of acrolein and acrylic acid,and 3.4% carbon oxide yield for the first stage catalyst,and 99.7% acrolein conversion,97.9% acrylic acid yield and 1.6% carbon oxide yield for the second stage catalyst.The acrylic acid yield could reach 88.8% and 88.9% in the pilot scale test and the 10 kt/a industrial test,respectively.