磷石膏在合成缩醛(酮)中的催化作用研究  

Investigative on Catalytic Performance of Phosphogypsum in Synthesis of Acetals(Ketals)

作　　者：蒋达波 谭建红[2] 周硕林[1] 徐琼[1] 尹笃林[1] JIANG Da-bo;TAN Jian-hong;ZHOU Shuo-lin;XU Qiong;YIN Du-lin(National and Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistl2~ and Chemical Engineering, Hunan Normal University, Hunan Changsha 410081 Chongqing City Yangtze Normal;College of Chemistry and Chemical Engineering, University, Chongqing 408100, China)

机构地区：[1]石化新材料与资源精细利用国家地方联合工程实验室湖南师范大学化学化工学院,湖南长沙410081 [2]重庆市长江师范学院化学化工学院,重庆408100

出　　处：《广州化工》2018年第8期38-41,共4页GuangZhou Chemical Industry

基　　金：国家自然科学基金(21003043);国家地方联合创新平台资助项目(20123098);湖南省教育厅科学研究基金(批准号:16C0114);重庆市涪陵区科技项目(No.FLKJ;2016ABA1027)

摘　　要：以磷石膏(PG)为催化剂催化合成缩醛(酮)。考察了醛醇摩尔比、反应时间、催化剂用量等因素对合成苯甲醛乙二醇缩醛的影响。通过XRF、XRD、FT-IR等表征手段与PG的毒化探针试验,探究了PG中的催化活性中心。结果表明:PG在催化苯甲醛乙二醇缩醛的合成中表现出良好的催化性能和重复使用性能。PG的Brnsted(B)酸位点主要由PG中残留的硫酸金属硫酸盐结合的结晶水提供,少量存在的Al^(3+),Fe^(3+)和其它过渡金属离子构成了Lewis(L)酸位点。The synthesis of acetals （ketones） was catalyzed by phosphogypsum. The effects of the mole ratio of ethylene glycol to benzaldehyde, catalyst dosage and reaction time on the yields of benzaldehyde glycol acetal were investigated. The catalytic activity center of phosphogypsum was investigated by means of XRF, XRD, FT-IR and the toxic probe test of phosphogypsum. The results showed that PG exhibited excellent catalytic activity and reusability in synthesis of benzaldehyde glycol acetal. It was suggested that the Brt^nsted （B） acid sites were mainly provided by residual sulphuric acid and the crystallization water of metal sulfates such as aluminum sulfate and iron sulfate, and the lesser presence of sulfates from other transition metal impurities contributed the Lewis（L） acid sites.

关 键 词：磷石膏 缩醛 缩酮 催化作用 酸性中心 

分 类 号：O611.65[理学—无机化学]