摘要
油酸臭氧化法是合成壬二酸(包括臭氧氧化和氧气催化氧化)的2步反应。考察了在水、壬酸和醋酸的混合溶剂体系中,第2步反应所需要的催化剂。通过监测反应过程中活性氧浓度(Concentration of activeoxygen,CAO)的变化,得出了几种有效的氧化-还原催化剂的活性顺序为V2O5>MnO2>MoO3>PbO2>醋酸钴>醋酸锰。通过考察各催化剂对壬二酸收率的影响,得出了它们选择性的顺序为MoO3>PbO2>MnO2>醋酸钴>醋酸锰>V2O5。当以MoO3或PbO2为催化剂时,壬二酸的收率可以稳定在75%以上。
Oxidation of oleic acid with ozone is an important way to produce azelaic acid. The process contains a two-step reaction, ozonization and further oxidation by oxygen in the presence of a catalyst. A mixed solvent system was used for the first step and a series of new catalysts were respectively introduced into the second step. The activity of each catalyst was studied by determining the concentration of active oxygen（CAO） in the reaction and the selectivity was investigated by comparing the corresponding yield of azelaic acid. The results show that the reactivity order of the catalysts studied is V2O5 〉 MnO2 〉 MoO3 〉 PbO2 〉 Co（OAc）2 · 4H2O 〉 Mn（OAc）2 · 4H2O, and the selectivity order is MoO3 〉 PbO2 〉 MnO2 〉 Co（ OAc）2 · 4H2O 〉 Mn（OAc）2 · 4H2O 〉 V2O5. With MoO3 or PbO2 as the catalyst, the yield of azelaic acid can be maintained above 75%.
出处
《应用化学》
CAS
CSCD
北大核心
2006年第2期161-164,共4页
Chinese Journal of Applied Chemistry
基金
中国科学院"西部之光"资助项目(2003年度)
新疆自治区科技厅攻关项目(05200333003003)
关键词
油酸
臭氧化
壬二酸
活性氧浓度(CAO)
oleic acid, ozonization, azelaic acid, concentration of active oxygen （CAO）
