Abstract:
The invention relates to a continuous method for separation of a mixture of hydrocarbons by extractive distillation having a mixture of a polar aprotic solvent and water as a selective solvent, in a system comprising an extractive distillation column and an outgas column, characterized in that the method is carried out under continuous measurement of the water content of the selective solvent via NIR spectroscopy, wherein the measured values from the continuous measurement of the water content of the selective solvent are compared to a specified target value and regulated to a value within a specified concentration range above and below the target value by addition or exfiltration of water or by addition of polar aprotic solvent.
Abstract:
THE INVENTION RELATES TO A REACTOR (1) IN THE FORM OF A HORIZONTAL CYLINDER (3) FOR CARRYING OUT AUTOTHERMAL GAS PHASE DEHYDRATION OF A HYDROCARBON-CONTAINING GAS FLOW (2) WITH AN OXYGEN-CONTAINING GAS FLOW (3), YIELDING A REACTION GAS MIXTURE, AT A HETEROGENEOUS CATALYST DESIGNED AS A MONOLITH (4), WHEREIN THE INNER CHAMBER OF THE REACTOR (1) IS DIVIDED BY A REMOVABLE, CIRCULAR CYLINDRICAL OR PRISMATIC HOUSING G, WHICH IS DISPOSED IN THE LONGITUDINAL DIRECTION OF THE REACTOR (1) AND IS GAS-TIGHT IN THE CIRCUMFERENTIAL DIRECTION, INTO AN INNER AREA A HAVING ONE OR MORE CATALYTICALLY ACTIVE ZONES (5), IN EACH OF WHICH A PACKAGE OF MONOLITHS (4) STACKED ON EACH OTHER, ADJACENT TO EACH OTHER, AND ARRANGED ONE BEHIND THE OTHER IS PROVIDED, A MIXING ZONE (6) HAVING FIXED INSTALLED FIXTURES BEING PROVIDED IN FRONT OF EACH ACTIVE ZONE (5), AND INTO AN OUTER AREA B DISPOSED COAXIALLY TO THE INNER AREA A, AND WHEREIN A HEAT EXCHANGER (12) CONNECTED TO THE HOUSING G IS PROVIDED AT AN END OF THE REACTOR, CHARACTERIZED IN THAT AN INERT GAS IS SUPPLIED TO THE OUTER AREA B. (FIGURE 1)
Abstract:
The catalyst contains on zeolite A as the carrier 0.01 to 0.5% by weight of platinum in relation to the catalyst and where applicable tin wherein the weight ratio of Sn:Pt is 0 to 10.
Abstract:
THE INVENTION RELATES TO A PROCESS FOR WORKUP OF A STREAM (1) COMPRISING BUTANE AND/OR BUTADIENE, BUTANE, HYDROGEN AND/OR NITROGEN AND CARBON DIOXIDE, COMPRISING THE FOLLOWING STEPS: (A) ABSORPTION OF THE STREAM (1) COMPRISING BUTANE AND/OR BUTADIENE, BUTANE, HYDROGEN AND/OR NITROGEN, WITH OR WITHOUT CARBON DIOXIDE, WITH A MIXTURE (5) COMPRISING 80 TO 97% BY WEIGHT OF N-METHYLPYRROLIDONE AND 3 TO 20% BY WEIGHT OF WATER TO OBTAIN A STREAM (9) COMPRISING N-METHYLPYRROLIDONE, WATER, BUTANE AND/OR BUTADIENE, AND BUTANE, WITH OR WITHOUT CARBON DIOXIDE, AND A STREAM (7) COMPRISING HYDROGEN AND/OR NITROGEN AND BUTANE, (B) EXTRACTIVE DISTILLATION OF THE STREAM (9) COMPRISING N-METHYLPYRROLIDONE, WATER, BUTANE AND/OR BUTADIENE, AND BUTANE, WITH OR WITHOUT CARBON DIOXIDE, WITH A STREAM (13) COMPRISING 80 TO 97% BY WEIGHT OF N-METHYLPYRROLIDONE AND 3 TO 20% BY WEIGHT OF WATER TO SEPARATE THE STREAM (9) COMPRISING N-METHYLPYRROLIDONE, WATER, BUTANE AND/OR BUTADIENE, AND BUTANE, WITH OR WITHOUT CARBON DIOXIDE, INTO A STREAM (17) COMPRISING N-METHYLPYRROLIDONE, WATER, BUTANE AND/OR BUTADIENE, AND A STREAM (15) COMPRISING ESSENTIALLY BUTANE, WITH OR WITHOUT CARBON DIOXIDE, (C) DISTILLATION OF THE STREAM (17) COMPRISING N-METHYLPYRROLIDONE, WATER BUTANE AND/OR BUTADIENE INTO A STREAM (23) COMPRISING ESSENTIALLY N-METHYLPYRROLIDONE AND WATER, AND A STREAM (21) COMPRISING BUTANE AND/OR BUTADIENE. (FIGURE 1)