A systematic study of the synthesis of C.I.Acid Blue 9 leuco compound in water is reported.The kinetic analysis of experimental data for the condensation reaction between 2-formylbenzenesulfonic acid sodium and N-ethy...A systematic study of the synthesis of C.I.Acid Blue 9 leuco compound in water is reported.The kinetic analysis of experimental data for the condensation reaction between 2-formylbenzenesulfonic acid sodium and N-ethyl-N-(3'-sulfonic acid benzyl) aniline obtained at four different temperatures ranging between 85 and 100°C is discussed.It is shown that the reaction followed second-order rate kinetics.The overall rate constant(k) increased with the increase of temperature.On the basis of the value of k,activation energy(E_a) of the reaction was evaluated.Importantly,it is found that reactant concentration has great effect on the formation of C.I.Acid Blue 9 leuco compound,implying that it is not enough to improve the conversion of N-ethyl-N-(3'-sulfonic acid benzyl) aniline by only prolonging reaction time in the late period of the reaction.展开更多
Azo dyes have received considerable attention because of their association with various human health problems. The aim of the investigation is to determine the adsorption behavior ofazo dyes in aqueous solution on DG0...Azo dyes have received considerable attention because of their association with various human health problems. The aim of the investigation is to determine the adsorption behavior ofazo dyes in aqueous solution on DG06, GSE17200, and GSE17201 soils using C. I. Acid Red 14 （AR14） as example. The experimental results indicate that the Freundlich model expresses the adsorption isotherm better than the Langmuir model and the pseudo-second-order model achieves adsorption of AR14 on the three soils well. Based on the pseudo-second-order model, the adsorption thermodynamic of AR14 on DG06 soil have been studied and the thermodynamics parameter of AGO is determined and AGO value shows the adsorption process of AR14 on DG06 is mainly physical in nature. Furthermore, the effects of temperature, pH and salinity （NaC1） on adsorption have been investigated. The decrease in pH or the increase in salinity enhances the adsorption of AR14 by DG06, GSE17200, and GSE17201.展开更多
将N-乙基-N-苄基苯胺-3’-磺酸与苯甲醛邻磺酸钠缩合后,在磷酸的存在下用自制的新鲜二氧化锰作氧化剂进行氧化反应,然后在氨水的存在下,使Mn++以络合物的形式产生沉淀过滤除去Mn++,直接喷雾干燥得到酸性翠蓝AE(C.I.Acid Blue 9,42090),...将N-乙基-N-苄基苯胺-3’-磺酸与苯甲醛邻磺酸钠缩合后,在磷酸的存在下用自制的新鲜二氧化锰作氧化剂进行氧化反应,然后在氨水的存在下,使Mn++以络合物的形式产生沉淀过滤除去Mn++,直接喷雾干燥得到酸性翠蓝AE(C.I.Acid Blue 9,42090),产品中锰的含量为15ppm^50ppm,系统地测定了染料的染色性能和色牢度。展开更多
基金Supported by the National Natural Science Foundation of China(U1608223,21576044,21421005,21536002)the Dalian University of Technology Innovation Team(DUT2016TB12)
文摘A systematic study of the synthesis of C.I.Acid Blue 9 leuco compound in water is reported.The kinetic analysis of experimental data for the condensation reaction between 2-formylbenzenesulfonic acid sodium and N-ethyl-N-(3'-sulfonic acid benzyl) aniline obtained at four different temperatures ranging between 85 and 100°C is discussed.It is shown that the reaction followed second-order rate kinetics.The overall rate constant(k) increased with the increase of temperature.On the basis of the value of k,activation energy(E_a) of the reaction was evaluated.Importantly,it is found that reactant concentration has great effect on the formation of C.I.Acid Blue 9 leuco compound,implying that it is not enough to improve the conversion of N-ethyl-N-(3'-sulfonic acid benzyl) aniline by only prolonging reaction time in the late period of the reaction.
文摘Azo dyes have received considerable attention because of their association with various human health problems. The aim of the investigation is to determine the adsorption behavior ofazo dyes in aqueous solution on DG06, GSE17200, and GSE17201 soils using C. I. Acid Red 14 （AR14） as example. The experimental results indicate that the Freundlich model expresses the adsorption isotherm better than the Langmuir model and the pseudo-second-order model achieves adsorption of AR14 on the three soils well. Based on the pseudo-second-order model, the adsorption thermodynamic of AR14 on DG06 soil have been studied and the thermodynamics parameter of AGO is determined and AGO value shows the adsorption process of AR14 on DG06 is mainly physical in nature. Furthermore, the effects of temperature, pH and salinity （NaC1） on adsorption have been investigated. The decrease in pH or the increase in salinity enhances the adsorption of AR14 by DG06, GSE17200, and GSE17201.
文摘将N-乙基-N-苄基苯胺-3’-磺酸与苯甲醛邻磺酸钠缩合后,在磷酸的存在下用自制的新鲜二氧化锰作氧化剂进行氧化反应,然后在氨水的存在下,使Mn++以络合物的形式产生沉淀过滤除去Mn++,直接喷雾干燥得到酸性翠蓝AE(C.I.Acid Blue 9,42090),产品中锰的含量为15ppm^50ppm,系统地测定了染料的染色性能和色牢度。
