空气催化氧化二苯并噻吩的研究  

Research of Catalytic Oxidation of Dibenzothiophene by Air

作　　者：常杰[1] 刘靖[1,2] 王安杰[1,2] 李翔[1,2] 倪晓磊[1] 胡永康[1,2] 

机构地区：[1]大连理工大学精细化工国家重点实验室,辽宁大连116012 [2]大连理工大学辽宁省石油化工技术与装备重点实验室,辽宁大连116012

出　　处：《精细化工》2009年第11期1132-1136,共5页Fine Chemicals

基　　金：国家自然科学基金青年基金(20503003);国家自然科学基金重点项目基金(20333030);国家自然科学基金(20773020)~~

摘　　要：以十氢萘、正辛烷、甲苯作为柴油中环烷烃、直链烷烃、芳香烃组分的代表为溶剂,分别研究了二苯并噻吩(DBT)在各溶剂中的氧化反应。以空气为氧化剂,过氧化苯甲酰(BPO)为引发剂,引发DBT溶液的溶剂分子发生自氧化反应,生成相应的有机过氧化物,用碘量滴定法测定有机过氧化物的生成;在催化剂Ti-MCM-41存在下,用原位生成的有机过氧化物将DBT氧化为二苯并噻吩砜。考察了Ti-MCM-41中钛硅摩尔比、引发剂用量、反应温度和不同溶剂对反应的影响:当n(Ti)/n(S i)=0.02,ρ(引发剂)=6 g/L,70℃,DBT转化率最高,在以十氢萘和正辛烷为溶剂时,二苯并噻吩的转化率均可达100%;在以甲苯为溶剂时,二苯并噻吩的转化率为83%。由于柴油中含有直链烷烃和环烷烃,所以采用该方法有望达到深度脱硫的目的。Decahydronaphthalene（decalin）,n-octane and toluene,as representational components of cyclanes,alkanes and aromatic hydrocarbons in diesel,are used as solvents respectively in this paper.The oxidations of DBT in them are investigated respectively.Air is used as oxidant and benzoyl hydroperoxide（BPO） is used as initiator.The solvent molecule of DBT can be oxidized to corresponding organic peroxide by air in the presence of BPO and the obtained organic peroxide is measured by iodometry method.Under catalyst Ti-MCM-41,DBT is oxidized to DBT sulfone by the in-situ obtained organic peroxides.The effect of Ti contents in Ti-MCM-41,initiators dosage,reaction temperature and solvent on conversion of DBT were studied in detail.The conversion of DBT can reach 100% at 70 ℃ in 3 h（dosage of BPO is 6 g/L） when using decalin or n-octane as solvent;the conversion of DBT can reach 83% when using toluene as solvent.Because there are cyclanes,alkanes in diesel,deep desulfurization is feasible by this method.

关 键 词：二苯并噻吩 氧化 空气 有机过氧化物 

分 类 号：TQ203.5[化学工程—有机化工]