文章主要研究了直接黑168染料(C.I. Direct Black 168)的合成方法。首先,将4,4'-二氨基二苯胺-2-磺酸(PP酸)双重氮化,在酸性介质中与H-酸进行第一次偶合;然后将苯胺重氮化,与上述单偶氮化合物在碱性介质中进行第二次偶合;再与间氨...文章主要研究了直接黑168染料(C.I. Direct Black 168)的合成方法。首先,将4,4'-二氨基二苯胺-2-磺酸(PP酸)双重氮化,在酸性介质中与H-酸进行第一次偶合;然后将苯胺重氮化,与上述单偶氮化合物在碱性介质中进行第二次偶合;再与间氨基苯酚进行第三次偶合;最后盐析、过滤。通过单因素实验确定了最佳合成工艺。展开更多
The effect of copper concentration on the performance of the catalytic reaction between silicon and methyl chloride was investigated using online gas chromatogram. The catalyst concentration greatly influences various...The effect of copper concentration on the performance of the catalytic reaction between silicon and methyl chloride was investigated using online gas chromatogram. The catalyst concentration greatly influences various aspects of the direct organosilane synthesis process, including the reaction rate, the selec- tivity, and the silicon conversion. The reaction activity and the silicon conversion increase as the catalyst concentration increases. However, the reaction selectivity decreases for the catalyst concentrations more .than 9 wt.%. The cross-sections of deactivated contact mass particles were observed by optical microscopy and analyzed by scanning electron microscope combined with energy dispersive X-ray detector （SEM-EDX） The observations showed that a textured substance formed on the original flat surface of the silicon particles after deactivation with copper only in a shallow surface layer of the contact mass. This indicates that the copper diffusion is the rate limiting step which causes the reaction deactivation.展开更多
文摘文章主要研究了直接黑168染料(C.I. Direct Black 168)的合成方法。首先,将4,4'-二氨基二苯胺-2-磺酸(PP酸)双重氮化,在酸性介质中与H-酸进行第一次偶合;然后将苯胺重氮化,与上述单偶氮化合物在碱性介质中进行第二次偶合;再与间氨基苯酚进行第三次偶合;最后盐析、过滤。通过单因素实验确定了最佳合成工艺。
文摘The effect of copper concentration on the performance of the catalytic reaction between silicon and methyl chloride was investigated using online gas chromatogram. The catalyst concentration greatly influences various aspects of the direct organosilane synthesis process, including the reaction rate, the selec- tivity, and the silicon conversion. The reaction activity and the silicon conversion increase as the catalyst concentration increases. However, the reaction selectivity decreases for the catalyst concentrations more .than 9 wt.%. The cross-sections of deactivated contact mass particles were observed by optical microscopy and analyzed by scanning electron microscope combined with energy dispersive X-ray detector （SEM-EDX） The observations showed that a textured substance formed on the original flat surface of the silicon particles after deactivation with copper only in a shallow surface layer of the contact mass. This indicates that the copper diffusion is the rate limiting step which causes the reaction deactivation.
