氧化镁/γ-氧化铝催化蒽醌法工艺降解物再生过程研究  

Regenerations of degradation products in anthraquinone process of hydrogen peroxide production over MgO/γ-Al_2O_3 catalysts

作　　者：赵珒 袁恩先 王莅[1] 

机构地区：[1]天津大学化工学院绿色合成与转化教育部重点实验室,天津化学化工协同创新中心,天津300072

出　　处：《无机盐工业》2015年第6期70-73,共4页Inorganic Chemicals Industry

摘　　要：以γ-氧化铝和六水合硝酸镁为原料,采用等体积浸渍法制备了氧化镁/γ-氧化铝催化剂。X射线衍射(XRD)显示,随着氧化铝含量增加,主要衍射峰位置逐渐向低角度方向偏移,表明在γ-氧化铝载体表面形成了MgAl2O4相。在常压、50℃下评价了氧化镁/γ-氧化铝催化剂对蒽醌工作液再生和5,6,7,8-四氢-2-乙基-9,10-蒽醌(H4EAQ)转化性能。结果表明,氧化镁/γ-氧化铝催化剂对蒽醌工作液中降解物再生和H4EAQ转化效果优于未改性γ-氧化铝,并且随着氧化镁负载量增加蒽醌工作液再生和H4EAQ转化效果增加。当氧化镁负载量达到30%(质量分数)时,氧化镁/γ-氧化铝催化剂对蒽醌降解物再生和H4EAQ转化量较γ-氧化铝分别提高54%和231%。MgO/γ-Al203 catalysts were prepared by incipient wetness impregnation with γ-Al203 and Mg （NO3）2· 6H20 as raw materials.XRD results showed that the position of characteristic diffraction peaks shifted to the low-angle direction,indica- ting the formation of MgA1204 phase on the surface of the γ-Al203 support.The regeneration reaction of degradation products （DP） and the transformation property of 2-ethyl-5,6,7,8-tetrahydro-9,10-anthrahydroquinone （H4EAQ） over MgO/γ-Al203 catalysts were carried out at atmospheric pressure and 50 ℃.The MgO/γ-Al203 catalysts exhibited the higher catalytic activity than γ-Al203 .The amounts of DP regeneration and H4EAQ transformation increased with increasing the MgO loading mass in MgO/A1EO3catalysts and both they reached the maximum at the MgO mass fraction of 30% ,together with the improve- ment in the DP regeneration and H4EAQ transformation of 54% and 231%, respectively, compared with γ-Al203.

关 键 词：蒽醌法 过氧化氢 再生 蒽醌降解物 氧化镁/γ-氧化铝 

分 类 号：TQ133.1[化学工程—无机化工]