摘要
采用γ-氧化铝为载体,以等体积浸渍法制备了锰/γ-氧化铝催化剂。以丙酸为原料,利用酸脱羧法在固定床反应器上合成了3-戊酮。研究了催化剂的制备条件对催化剂活性的影响。结果表明,锰的负载量为10%～13%(质量分数),浸渍时间为5h,焙烧温度为450～600℃时制得的催化剂活性最优。在此条件下,丙酸转化率大于95%,选择性大于90%。对催化剂的寿命进行了研究,其寿命达到80h。制得的催化剂用红外光谱进行了表征,结果表明锰进入了γ-氧化铝晶格内形成了Mn—O—Al键。
Mn/γ-Al2O3 catalyst was prepared by isopyknic soaking method,using γ-Al2O3 as supporter.3-pentanone was synthesized by acid-decarboxylation method in fixed bed reactor with propionic acid as raw material.Influences of preparation conditions on catalyst activity were researched.Results showed that the optimal preparing conditions were as follows：loading amount of Mn was 10%～13%（mass fraction）;impregnation time was 5 h;and calcination temperature was between 450～600 ℃.Under these conditions the percent conversion of propionic acid was over 95% and selectivity was over 90%.Catalyst life test indictated that the life of Mn/γ-Al2O3 reached 80 h.FT-IR characterization of catalyst showed that Mn entered into crystal lattices of Al2O3 and new chemical bond Mn—O—Al was formed.
出处
《无机盐工业》
CAS
北大核心
2010年第4期33-35,共3页
Inorganic Chemicals Industry
