Thiophene(C4H4S) is a typical sulfur-containing compound in fluid catalytic cracking(FCC) gasoline.Oxidative desulfurization of C4H4S in n-heptane solution was conducted with hydrogen peroxide (H2O2) and formic acid o...Thiophene(C4H4S) is a typical sulfur-containing compound in fluid catalytic cracking(FCC) gasoline.Oxidative desulfurization of C4H4S in n-heptane solution was conducted with hydrogen peroxide (H2O2) and formic acid over a catalyst of 5A molecular sieve loaded with ceria.The effects of oxidative agent, solvent,reaction temperature as well as the addition of phase transfer catalyst were investigated in detail.The reaction course of oxidative desulfurization of C4H4S was preliminarily studied.The oxidation of C4H4S was achieved under mild reaction conditions and it was easy to raise the reaction temperature or increase the reaction time to achieve high oxidation conversions.The results showed that the conversion of C4H4S in n-heptane solution was 78.2% under the condition of reaction temperature of 50℃,nH2O2∶nS=10∶1,VH2O2∶VHCOOH=1∶1.The conversion of C4H4S was 94.5% when an emulsifier OP was added to this system.However, with the addition of tetrabutylammonium bromide (TBAB), a bromine substitution product appeared in the oxidation of C4H4S.展开更多
研究了以双辛基酚聚氧乙烯醚和双烷基苯双磺酸盐这两类双子表面活性剂为主的金属清洗剂的清洗性能。结果表明,这种含有阴/非双子表面活性剂的金属清洗液具有较高的表面活性,阴/非双子表面活性剂之间存在良好的协同效应。清洗液和润滑油...研究了以双辛基酚聚氧乙烯醚和双烷基苯双磺酸盐这两类双子表面活性剂为主的金属清洗剂的清洗性能。结果表明,这种含有阴/非双子表面活性剂的金属清洗液具有较高的表面活性,阴/非双子表面活性剂之间存在良好的协同效应。清洗液和润滑油之间具有较低的瞬间界面张力,能将含油铝片的液-固接触角大幅度减小。在超声波作用下3 m in左右含双子表面活性剂的清洗液的去油率可达100%,腐蚀率几乎为零,最佳清洗温度在40℃左右。展开更多
文摘Thiophene(C4H4S) is a typical sulfur-containing compound in fluid catalytic cracking(FCC) gasoline.Oxidative desulfurization of C4H4S in n-heptane solution was conducted with hydrogen peroxide (H2O2) and formic acid over a catalyst of 5A molecular sieve loaded with ceria.The effects of oxidative agent, solvent,reaction temperature as well as the addition of phase transfer catalyst were investigated in detail.The reaction course of oxidative desulfurization of C4H4S was preliminarily studied.The oxidation of C4H4S was achieved under mild reaction conditions and it was easy to raise the reaction temperature or increase the reaction time to achieve high oxidation conversions.The results showed that the conversion of C4H4S in n-heptane solution was 78.2% under the condition of reaction temperature of 50℃,nH2O2∶nS=10∶1,VH2O2∶VHCOOH=1∶1.The conversion of C4H4S was 94.5% when an emulsifier OP was added to this system.However, with the addition of tetrabutylammonium bromide (TBAB), a bromine substitution product appeared in the oxidation of C4H4S.
文摘研究了以双辛基酚聚氧乙烯醚和双烷基苯双磺酸盐这两类双子表面活性剂为主的金属清洗剂的清洗性能。结果表明,这种含有阴/非双子表面活性剂的金属清洗液具有较高的表面活性,阴/非双子表面活性剂之间存在良好的协同效应。清洗液和润滑油之间具有较低的瞬间界面张力,能将含油铝片的液-固接触角大幅度减小。在超声波作用下3 m in左右含双子表面活性剂的清洗液的去油率可达100%,腐蚀率几乎为零,最佳清洗温度在40℃左右。
