Amylanthraquinone (AAQ) is a novel,effective working carrier and a potential substitute of 2-ethylanthraquinone (EAQ) in hydrogen peroxide production process.In order to obtain the basic data for the process developme...Amylanthraquinone (AAQ) is a novel,effective working carrier and a potential substitute of 2-ethylanthraquinone (EAQ) in hydrogen peroxide production process.In order to obtain the basic data for the process development,the equilibria method was used to experimentally measure the solubility of AAQ in the mixed organic solvents of trimethylbenzen(TMB) and trioctyl phosphate(TOP) with different volume ratios,at 298.15—323.15 K. It was found that the solubility of AAQ was ca . 3 times greater than EAQ at the same conditions. Finally,experimental data were correlated by the modified λ-h equation,in which a factor of the solvent composition was added.The results showed that the modified λ-h equation can be used to predict the solubility of AAQ in TMB/TOP system with an average relative deviation (ARD) of 5%.展开更多
The solubility of 2-amylanthraquinone and 2-ethylanthraquinone in trimethylbenzene/tetrabutylurea, trimethylbenzene/methylcyclohexylacetate and trimethylbenzene/trioctylphosphate at 3∶1 volumetric ratio were determin...The solubility of 2-amylanthraquinone and 2-ethylanthraquinone in trimethylbenzene/tetrabutylurea, trimethylbenzene/methylcyclohexylacetate and trimethylbenzene/trioctylphosphate at 3∶1 volumetric ratio were determined from 303.15 to 323.15 K with the equilibrium method and λ-h equation was used for correlation.From comparing the solubility of 2-amylanthraquinone and 2-ethylanthraquinone in the three systems of mixed solvents,the solubility of 2-amylanthraquinone was much higher than 2-ethylanthraquinone and the solubility values of these two alkyl anthraquinones in trimethylbenzene/tetrabutylurea and trimethylbenzene/methylcyclohexylacetate were higher than those in trimethylbenzene/trioctylphosphate.So 2-amylanthraquinone could replace 2-ethylanthraquinone and trimethylbenzene/tetrabutylurea or trimethylbenzene/methylcyclohexylacetate could replace trimethylbenzene/trioctylphosphate in producing hydrogen peroxide.展开更多
对蒽醌类化合物在大气压化学电离源(atmospheric-pressure chemical ionization,APCI)中的离子化行为进行了研究,首次提出了APCI源中可以存在分子内氢键,更好地解释了质子转移和电荷转移2种离子化方式在APCI源中的竞争,是对APCI源离子...对蒽醌类化合物在大气压化学电离源(atmospheric-pressure chemical ionization,APCI)中的离子化行为进行了研究,首次提出了APCI源中可以存在分子内氢键,更好地解释了质子转移和电荷转移2种离子化方式在APCI源中的竞争,是对APCI源离子化机理的补充。分别比较研究了7种蒽醌类化合物在流动注射进样时正离子和负离子模式下的离子化规律及HPLC-MS进样时的离子化规律。通过改变流动相的流速和比例改变离子源中反应离子的种类和数量,研究离子化环境对蒽醌类化合物电离方式的影响。蒽醌类化合物在正离子模式下主要是得质子的离子化过程,在负离子模式下表现出明显的质子转移和电子转移2种离子化方式的竞争,电子转移的离子化方式在蒽醌类化合物中占明显优势。APCI源中质子转移和电荷转移方式哪种占优势除受化合物本身结构的影响外,离子化环境中的反应离子对其也起到很重要的作用。展开更多
文摘Amylanthraquinone (AAQ) is a novel,effective working carrier and a potential substitute of 2-ethylanthraquinone (EAQ) in hydrogen peroxide production process.In order to obtain the basic data for the process development,the equilibria method was used to experimentally measure the solubility of AAQ in the mixed organic solvents of trimethylbenzen(TMB) and trioctyl phosphate(TOP) with different volume ratios,at 298.15—323.15 K. It was found that the solubility of AAQ was ca . 3 times greater than EAQ at the same conditions. Finally,experimental data were correlated by the modified λ-h equation,in which a factor of the solvent composition was added.The results showed that the modified λ-h equation can be used to predict the solubility of AAQ in TMB/TOP system with an average relative deviation (ARD) of 5%.
文摘The solubility of 2-amylanthraquinone and 2-ethylanthraquinone in trimethylbenzene/tetrabutylurea, trimethylbenzene/methylcyclohexylacetate and trimethylbenzene/trioctylphosphate at 3∶1 volumetric ratio were determined from 303.15 to 323.15 K with the equilibrium method and λ-h equation was used for correlation.From comparing the solubility of 2-amylanthraquinone and 2-ethylanthraquinone in the three systems of mixed solvents,the solubility of 2-amylanthraquinone was much higher than 2-ethylanthraquinone and the solubility values of these two alkyl anthraquinones in trimethylbenzene/tetrabutylurea and trimethylbenzene/methylcyclohexylacetate were higher than those in trimethylbenzene/trioctylphosphate.So 2-amylanthraquinone could replace 2-ethylanthraquinone and trimethylbenzene/tetrabutylurea or trimethylbenzene/methylcyclohexylacetate could replace trimethylbenzene/trioctylphosphate in producing hydrogen peroxide.
文摘对蒽醌类化合物在大气压化学电离源(atmospheric-pressure chemical ionization,APCI)中的离子化行为进行了研究,首次提出了APCI源中可以存在分子内氢键,更好地解释了质子转移和电荷转移2种离子化方式在APCI源中的竞争,是对APCI源离子化机理的补充。分别比较研究了7种蒽醌类化合物在流动注射进样时正离子和负离子模式下的离子化规律及HPLC-MS进样时的离子化规律。通过改变流动相的流速和比例改变离子源中反应离子的种类和数量,研究离子化环境对蒽醌类化合物电离方式的影响。蒽醌类化合物在正离子模式下主要是得质子的离子化过程,在负离子模式下表现出明显的质子转移和电子转移2种离子化方式的竞争,电子转移的离子化方式在蒽醌类化合物中占明显优势。APCI源中质子转移和电荷转移方式哪种占优势除受化合物本身结构的影响外,离子化环境中的反应离子对其也起到很重要的作用。
