Title translation:VERFAHREN ZUR KONTINUIERLICHEN DESTILLATIVEN AUFTRENNUNG VON GEMISCHEN ENTHALTEND MORPHOLIN(MO),MONOAMINODIGLYKOL(ADG),AMMONIAK UND WASSER
Abstract:
The invention relates to method for the continuous separation of mixtures comprising morpholine (MO), monoaminodiglycol (ADG), ammonia, and water by means of distillation, obtained by the reaction of diethylene glycol (DEG) with ammonia, wherein in a first distillation column K10 ammonia is separated at the head, the yield of K10 is fed to a second distillation column K20, in which water and organic products are separated at the head at a head temperature ranging between 45 and 198°C, and a pressure ranging between 0.1 and 15 bars, the yield of K20 is fed to a third distillation column K30, in which MO and organic products having a boiling point of 190°C (1.013 bars) are separated at the bottom, and the flow comprising the MO, which is separated in column K30 at the head or by side draw, is fed to a column K40, in which the MO is separated by side draw, organic products having a boiling point of 128°C (1.013 bars) are separated at the head, and organic products having a boiling point of 128°C (1.013 bars) are separated at the bottom.
Title translation:VERFAHREN ZUR KONTINUIERLICHEN DESTILLATIVEN AUFTRENNUNG VON GEMISCHEN ENTHALTEND MORPHOLIN(MO),MONOAMINODIGLYKOL(ADG),AMMONIAK UND WASSER
Abstract:
The invention relates to a method for the continuous separation by distillation of mixtures that contain morpholine (MO), monoaminodiglycol (ADG), ammonia and water, obtained by reacting diethyleneglycol (DEG) with ammonia. The method according to the invention is characterized by separating ammonia at the head of a first distillation column K10, feeding the product from the bottom of the column K10 to a second distillation column K20 in which water and organic products are removed at the head of the column at a head temperature ranging from 45 to 198°C and a pressure ranging from 0.1 to 15 bar, feeding the product from the bottom of the column K20 to a third distillation column K30, said column K30 being a divided wall column (TK) that has a partition wall (T) in the longitudinal direction of the column forming an upper common column section (1), a lower common column section (6), an inlet section (2, 4) having a rectification section (2) and a stripping section (4), and an outlet section (4, 5) having a rectification section (3) and a stripping section (5). The product from the bottom of the column of K20 is fed in the upper and middle third of the feed section (2, 4), based on the number of theoretical plates of the feed section, ADG and organic products having a boiling point > 190 °C (1.013 bar) are removed via the bottom of the column, the organic products having a boiling point ≤ 128 °C (1.013 bar) are removed via the head of the column, and the MO is removed from the middle and lower third of the outlet section (3, 5) (side stream), based on the number of theoretical plates of the outlet section.
Abstract:
A process for preparing 1,4-bishydroxyethylpiperazine (BHEPIP) of the formula I, characterized in that diethanolamine (DEOA) of the formula II is converted in a reactor at a temperature in the range from 130 to 300°C in the presence of a copper-containing, chromium-free heterogeneous catalyst in the liquid phase.
Abstract:
The invention relates to a reactor for carrying out high pressure reactions, comprising at least one tube (31), the ends of which pass through respective tube sheets (33) and connect to the tube sheets (33). The tube sheets (33) and the at least one tube (31) are enclosed by an outer shell so that an external space (39) is formed between the tube (31) and the outer shell. The tube sheets (33) each comprise at least one surface made of a nickel base alloy, and the at least one tube (31) is welded to the surface made of the nickel base alloy. The surface made of the nickel base alloy faces in the direction of the respective end of the reactor. The outer shell has a thickness sufficient to absorb stress forces that occur as a result of a difference in expansion due to a temperature difference between the tube (31) and the outer shell. The invention further relates to a method for starting up the reactor and for carrying out an exothermal reaction in the reactor.
Abstract:
The invention relates to a reactor for carrying out high pressure reactions, comprising at least one tube (31), the ends of which pass through respective tube sheets (33) and connect to the tube sheets (33). The tube sheets (33) and the at least one tube (31) are enclosed by an outer shell so that an external space (39) is formed between the tube (31) and the outer shell. The tube sheets (33) each comprise at least one surface made of a nickel base alloy, and the at least one tube (31) is welded to the surface made of the nickel base alloy. The surface made of the nickel base alloy faces in the direction of the respective end of the reactor. The outer shell has a thickness sufficient to absorb stress forces that occur as a result of a difference in expansion due to a temperature difference between the tube (31) and the outer shell. The invention further relates to a method for starting up the reactor and for carrying out an exothermal reaction in the reactor.
Abstract:
The invention relates to a method for the continuous hydrogenation of unsaturated compounds, according to which particles of a first hydrogenating catalyst are suspended in a liquid phase in which an unsaturated compound is dissolved. According to the invention, the liquid phase is guided through a packed bubble column, in the presence of a hydrogenous gas which is subjected to a first partial hydrogen pressure and is at a first temperature in the parallel flow in the opposite direction to the gravitational force, the substance discharged from the bubble column reactor is subjected to a gas-liquid separation, and the liquid phase is then subjected to a transversal filtration, whereby a retentate and a filtrate are obtained. The retentate is introduced back into the bubble reactor, and the filtrate is guided over a bed of a second hydrogenating catalyst in the presence of a hydrogenous gas subjected to a second hydrogen partial pressure and at a second temperature, the second hydrogen partial pressure being at least 10 bar higher than the first hydrogen partial pressure.
Abstract:
The invention relates to a method for the continuous hydrogenation of unsaturated compounds, according to which particles of a first hydrogenating catalyst are suspended in a liquid phase in which an unsaturated compound is dissolved. According to the invention, the liquid phase is guided through a packed bubble column, in the presence of a hydrogenous gas which is subjected to a first partial hydrogen pressure and is at a first temperature in the parallel flow in the opposite direction to the gravitational force, the substance discharged from the bubble column reactor is subjected to a gas-liquid separation, and the liquid phase is then subjected to a transversal filtration, whereby a retentate and a filtrate are obtained. The retentate is introduced back into the bubble reactor, and the filtrate is guided over a bed of a second hydrogenating catalyst in the presence of a hydrogenous gas subjected to a second hydrogen partial pressure and at a second temperature, the second hydrogen partial pressure being at least 10 bar higher than the first hydrogen partial pressure.