The present disclosure provides a preparation method of 4-(heptafluoro-2-propyl)-2-trifluoromethylaniline and an application thereof. The preparation method comprises the following steps: reacting 2-aminobenzotrifluoride and 2-bromoheptafluoropropane in the presence of sodium formate or hydrates thereof and a SO.sub.2 reagent, so as to obtain 4-(heptafluoro-2-propyl)-2-trifluoromethylaniline. The present disclosure adds sodium formate or hydrate thereof and the SO.sub.2 reagent during the reaction of 2-aminobenzotrifluoride and 2-bromoheptafluoropropane. Under the cooperation of these two compounds, the yield of the reaction is high. And the purity of the product is high, the operation method is simple, the cost is relatively low, and the pH of the reaction doesn't need to be controlled.

The present disclosure provides a preparation method of 4-(heptafluoro-2-propyl)-2-trifluoromethylaniline and an application thereof. The preparation method comprises the following steps: reacting 2-aminobenzotrifluoride and 2-bromoheptafluoropropane in the presence of sodium formate or hydrates thereof and a SO.sub.2 reagent, so as to obtain 4-(heptafluoro-2-propyl)-2-trifluoromethylaniline. The present disclosure adds sodium formate or hydrate thereof and the SO.sub.2 reagent during the reaction of 2-aminobenzotrifluoride and 2-bromoheptafluoropropane. Under the cooperation of these two compounds, the yield of the reaction is high. And the purity of the product is high, the operation method is simple, the cost is relatively low, and the pH of the reaction doesn't need to be controlled.

An organic photodetector includes: a first electrode; a second electrode facing the first electrode; an activation layer between the first electrode and the second electrode; a hole injection layer between the first electrode and the activation layer; and a hole transport layer between the hole injection layer and the activation layer, wherein the hole transport layer includes: a first hole transport layer including a p-dopant; and a second hole transport layer not including a p-dopant.

An organic photodetector includes: a first electrode; a second electrode facing the first electrode; an activation layer between the first electrode and the second electrode; a hole injection layer between the first electrode and the activation layer; and a hole transport layer between the hole injection layer and the activation layer, wherein the hole transport layer includes: a first hole transport layer including a p-dopant; and a second hole transport layer not including a p-dopant.

The present invention relates to a process for purifying ethylenediamine, in which a) a mixture comprising water (H2O), ethylenediamine (EDA) and N-methylethylenediamine (NMEDA) is introduced into a rectification column (NMEDA removal column), where the mixture introduced comprises at least the amount of water as required for the formation of a high-boiling azeotrope of EDA and water at the appropriate bottom temperature; and the EDA-comprising bottom product from the NMEDA removal column is introduced into a second rectification column (EDA dewatering column), wherein the pressure at the top of the EDA dewatering column is adjusted such that the boiling temperature of the mixture obtained at the top is 10° C. or higher than the bottom temperature of the NMEDA removal column, which comprises (i) partly or fully condensing the vapors from the top of the EDA dewatering column in a condenser which is cooled with a medium which is at least partly evaporated during the condensation and the vapor thus formed is used at least partly to heat the evaporator of the NMEDA removal column; and/or (ii) introducing the vapors from the top of the EDA dewatering column into the NMEDA removal column.

The present invention relates to a process for purifying ethylenediamine, in which a) a mixture comprising water (H2O), ethylenediamine (EDA) and N-methylethylenediamine (NMEDA) is introduced into a rectification column (NMEDA removal column), where the mixture introduced comprises at least the amount of water as required for the formation of a high-boiling azeotrope of EDA and water at the appropriate bottom temperature; and the EDA-comprising bottom product from the NMEDA removal column is introduced into a second rectification column (EDA dewatering column), wherein the pressure at the top of the EDA dewatering column is adjusted such that the boiling temperature of the mixture obtained at the top is 10° C. or higher than the bottom temperature of the NMEDA removal column, which comprises (i) partly or fully condensing the vapors from the top of the EDA dewatering column in a condenser which is cooled with a medium which is at least partly evaporated during the condensation and the vapor thus formed is used at least partly to heat the evaporator of the NMEDA removal column; and/or (ii) introducing the vapors from the top of the EDA dewatering column into the NMEDA removal column.

The present disclosure provides a preparation method of 4-(heptafluoro-2-propyl)-2-trifluoromethylaniline and an application thereof. The preparation method comprises the following steps: reacting 2-aminobenzotrifluoride and 2-bromoheptafluoropropane in the presence of sodium formate or hydrates thereof and a SO.sub.2 reagent, so as to obtain 4-(heptafluoro-2-propyl)-2-trifluoromethylaniline. The present disclosure adds sodium formate or hydrate thereof and the SO.sub.2 reagent during the reaction of 2-aminobenzotrifluoride and 2-bromoheptafluoropropane. Under the cooperation of these two compounds, the yield of the reaction is high. And the purity of the product is high, the operation method is simple, the cost is relatively low, and the pH of the reaction doesn't need to be controlled.

The present disclosure provides a preparation method of 4-(heptafluoro-2-propyl)-2-trifluoromethylaniline and an application thereof. The preparation method comprises the following steps: reacting 2-aminobenzotrifluoride and 2-bromoheptafluoropropane in the presence of sodium formate or hydrates thereof and a SO.sub.2 reagent, so as to obtain 4-(heptafluoro-2-propyl)-2-trifluoromethylaniline. The present disclosure adds sodium formate or hydrate thereof and the SO.sub.2 reagent during the reaction of 2-aminobenzotrifluoride and 2-bromoheptafluoropropane. Under the cooperation of these two compounds, the yield of the reaction is high. And the purity of the product is high, the operation method is simple, the cost is relatively low, and the pH of the reaction doesn't need to be controlled.

The invention relates to a method for preparing a toluylene diamine mixture which, along with toluylene diamine (TDA), also contains a high-boiling fraction, such as the high-boiling fraction which is accumulated as a sump flow in the distillative preparation of product mixtures obtained by hydrogenating dinitrotoluene. The method has a step (A), namely preparing a TDA mixture containing, based on the total mass of the mixture, (1) TDA in a range of 5 mass % to 80 mass % and (2) a high-boiling fraction in a range of 20 mass % to 95 mass %; a step (B), namely distilling TDA off from the TDA mixture, thereby obtaining a liquid TDA-depleted method product, containing (1) TDA in a range of 0 mass % to 38 mass % and (2) a high-boiling fraction in a range of 62 mass % to 100 mass %; and a step (C) namely mixing water into the TDA-depleted method product in a mixing chamber, thereby obtaining a mixture mixed with water, wherein the temperature and quantity of the water to be mixed into the mixture and the temperature and quantity of the TDA-depleted method product are matched such that the resulting temperature of the mixture mixed with water ranges from 110° C. to 250° C., and the mixture mixed with water is provided as a single phase. The mixing chamber is supplied with a pressure which is greater than or equal to the water vapor partial pressure at the resulting temperature.

The invention relates to a method for preparing a toluylene diamine mixture which, along with toluylene diamine (TDA), also contains a high-boiling fraction, such as the high-boiling fraction which is accumulated as a sump flow in the distillative preparation of product mixtures obtained by hydrogenating dinitrotoluene. The method has a step (A), namely preparing a TDA mixture containing, based on the total mass of the mixture, (1) TDA in a range of 5 mass % to 80 mass % and (2) a high-boiling fraction in a range of 20 mass % to 95 mass %; a step (B), namely distilling TDA off from the TDA mixture, thereby obtaining a liquid TDA-depleted method product, containing (1) TDA in a range of 0 mass % to 38 mass % and (2) a high-boiling fraction in a range of 62 mass % to 100 mass %; and a step (C) namely mixing water into the TDA-depleted method product in a mixing chamber, thereby obtaining a mixture mixed with water, wherein the temperature and quantity of the water to be mixed into the mixture and the temperature and quantity of the TDA-depleted method product are matched such that the resulting temperature of the mixture mixed with water ranges from 110° C. to 250° C., and the mixture mixed with water is provided as a single phase. The mixing chamber is supplied with a pressure which is greater than or equal to the water vapor partial pressure at the resulting temperature.