提出了一种新型硫酸法C4烷基化生产工艺,丁烯原料在气相状态下进入反应器,与液相异丁烷、浓硫酸混合后,部分丁烯溶于液相,在液相中进行反应;通过控制反应器的压力,部分液相吸收反应热而汽化,使反应温度基本稳定;经气液分离、酸烃分离及...提出了一种新型硫酸法C4烷基化生产工艺,丁烯原料在气相状态下进入反应器,与液相异丁烷、浓硫酸混合后,部分丁烯溶于液相,在液相中进行反应;通过控制反应器的压力,部分液相吸收反应热而汽化,使反应温度基本稳定;经气液分离、酸烃分离及产品分馏后,气相丁烯、异丁烷、浓硫酸分别构成循环。采用Aspen Plus过程模拟软件对新工艺过程进行模拟计算的结果表明,在反应器进口压力0.2 MPa、压降4.5 k Pa的条件下,反应器进出口温度均在7.2℃左右,可通过调节反应器压力实现温度的控制;反应器进口液相中烷烯质量比为145∶1,可减少副反应的发生;与传统硫酸法C4烷基化工艺相比,新工艺耗电量可降低30%。展开更多
Two metabolites(A and B) were isolated from a mangrove endophytic fungus Stysanus like sp.(#2492) from the South China Sea.Their structures were elucidated by spectral data as N-(2’-hydroxytetracosyl)-2-amino1,3,4-tr...Two metabolites(A and B) were isolated from a mangrove endophytic fungus Stysanus like sp.(#2492) from the South China Sea.Their structures were elucidated by spectral data as N-(2’-hydroxytetracosyl)-2-amino1,3,4-trihydroxyoctadecane(A) and γ-stearolactone(B).In the primary bioassay,compound B did not exhibit significant inhibitory activity to DNA topoisomerase hTOP Ⅰ,and also had no significant inhibitory activity to tumor cell lines Bel-7402 and NCIH-460.It was the first report that γ-stearolactone(B) isolated from marine fungus as natural product.展开更多
文摘提出了一种新型硫酸法C4烷基化生产工艺,丁烯原料在气相状态下进入反应器,与液相异丁烷、浓硫酸混合后,部分丁烯溶于液相,在液相中进行反应;通过控制反应器的压力,部分液相吸收反应热而汽化,使反应温度基本稳定;经气液分离、酸烃分离及产品分馏后,气相丁烯、异丁烷、浓硫酸分别构成循环。采用Aspen Plus过程模拟软件对新工艺过程进行模拟计算的结果表明,在反应器进口压力0.2 MPa、压降4.5 k Pa的条件下,反应器进出口温度均在7.2℃左右,可通过调节反应器压力实现温度的控制;反应器进口液相中烷烯质量比为145∶1,可减少副反应的发生;与传统硫酸法C4烷基化工艺相比,新工艺耗电量可降低30%。
文摘Two metabolites(A and B) were isolated from a mangrove endophytic fungus Stysanus like sp.(#2492) from the South China Sea.Their structures were elucidated by spectral data as N-(2’-hydroxytetracosyl)-2-amino1,3,4-trihydroxyoctadecane(A) and γ-stearolactone(B).In the primary bioassay,compound B did not exhibit significant inhibitory activity to DNA topoisomerase hTOP Ⅰ,and also had no significant inhibitory activity to tumor cell lines Bel-7402 and NCIH-460.It was the first report that γ-stearolactone(B) isolated from marine fungus as natural product.
