An aqueous solution of aniline was oxidized in supercritical water with a flow reactor under the conditions of 25 MPa, 300% excess oxygen, 2.351×10 -4 mol·L -1 aniline .GC-MS analysis of the oxidation produc...An aqueous solution of aniline was oxidized in supercritical water with a flow reactor under the conditions of 25 MPa, 300% excess oxygen, 2.351×10 -4 mol·L -1 aniline .GC-MS analysis of the oxidation products extracted from the aqueous reactor effluent permitted identification of compounds such as azobenzene, phenazine and acetic acid. The products could be classified as dimers,single-ring or ring-opening produces,carboxylic acids and ultimate products.The contents of dimers (such as azobenzene and phenazine) were greater than other products.A reaction network consistent with the experimental observations was developed. The study revealed that aniline might be oxidized to ultimate products through two parallel pathways. The formation of dimers such as azobenzene, phenazine and the further oxidation of these dimers were the main pathways. It was indicated experimentally that the rate controlling step of aniline oxidation was the further oxidation of azobenzene and phenazine, but not the further oxidation of organic acid such as acetic acid, formic acid and so on.展开更多
在一直径为700mm 的搅拌槽中研究了桨结构和模拟物料性质对颗粒的轴向浓度分布,临界搅拌转速和功率消耗的影响。认为 d=0.4 D 的6IBT(45°)折叶桨最适合用于固液悬浮。对只要求实现临界悬浮的过程,用单桨比用双桨省功;对要求实现较...在一直径为700mm 的搅拌槽中研究了桨结构和模拟物料性质对颗粒的轴向浓度分布,临界搅拌转速和功率消耗的影响。认为 d=0.4 D 的6IBT(45°)折叶桨最适合用于固液悬浮。对只要求实现临界悬浮的过程,用单桨比用双桨省功;对要求实现较均匀悬浮的过程,采用双桨时不但省功而且操作转速低。经对实验数据的回归处理得到临界搅拌转速和功率准数的经验关联式如下:(1)6IBT(45°)桨:(■)(2)4IBT(45。)桨:(■)(3)45°折叶桨:(■)展开更多
文摘An aqueous solution of aniline was oxidized in supercritical water with a flow reactor under the conditions of 25 MPa, 300% excess oxygen, 2.351×10 -4 mol·L -1 aniline .GC-MS analysis of the oxidation products extracted from the aqueous reactor effluent permitted identification of compounds such as azobenzene, phenazine and acetic acid. The products could be classified as dimers,single-ring or ring-opening produces,carboxylic acids and ultimate products.The contents of dimers (such as azobenzene and phenazine) were greater than other products.A reaction network consistent with the experimental observations was developed. The study revealed that aniline might be oxidized to ultimate products through two parallel pathways. The formation of dimers such as azobenzene, phenazine and the further oxidation of these dimers were the main pathways. It was indicated experimentally that the rate controlling step of aniline oxidation was the further oxidation of azobenzene and phenazine, but not the further oxidation of organic acid such as acetic acid, formic acid and so on.
文摘在一直径为700mm 的搅拌槽中研究了桨结构和模拟物料性质对颗粒的轴向浓度分布,临界搅拌转速和功率消耗的影响。认为 d=0.4 D 的6IBT(45°)折叶桨最适合用于固液悬浮。对只要求实现临界悬浮的过程,用单桨比用双桨省功;对要求实现较均匀悬浮的过程,采用双桨时不但省功而且操作转速低。经对实验数据的回归处理得到临界搅拌转速和功率准数的经验关联式如下:(1)6IBT(45°)桨:(■)(2)4IBT(45。)桨:(■)(3)45°折叶桨:(■)
