Abstract: A process for obtaining pure aniline contains catalytically hydrogenating nitrobenzene, to obtain a reaction mixture, separating the reaction mixture into a gas phase containing hydrogen and a liquid phase, liquid/liquid phase separating the liquid phase to obtain an aqueous phase and also crude aniline containing water as an organic phase, distillatively pre-purifying the crude aniline by removing the water via an overhead stream of a first distillation column to obtain a first bottom stream, feeding the first bottom stream as a feed stream to a pure column from which a pure aniline stream is taken off at the top and a second bottom stream containing high boilers is taken off, and passing the second bottom stream to incineration, by pumping the second bottom stream through heated pipelines and by adding methanol, ethanol, propanol, and/or acetone to the second bottom stream.

Abstract: A process for obtaining pure aniline contains catalytically hydrogenating nitrobenzene, to obtain a reaction mixture, separating the reaction mixture into a gas phase containing hydrogen and a liquid phase, liquid/liquid phase separating the liquid phase to obtain an aqueous phase and also crude aniline containing water as an organic phase, distillatively pre-purifying the crude aniline by removing the water via an overhead stream of a first distillation column to obtain a first bottom stream, feeding the first bottom stream as a feed stream to a pure column from which a pure aniline stream is taken off at the top and a second bottom stream containing high boilers is taken off, and passing the second bottom stream to incineration, by pumping the second bottom stream through heated pipelines and by adding methanol, ethanol, propanol, and/or acetone to the second bottom stream.

Abstract: The present invention relates to a solids dosing device for finely divided solids, comprising sampling means for withdrawing a sample from a sampling jar and dosing means for inserting a prescribed amount of finely divided solid material into a testing jar, a dosing accuracy of at least 0.1 g being achieved with the solids dosing device and characteristics of the dosed amount substantially corresponding to those of the sample in the sampling jar. The invention also relates to an automated analyzer for determining properties of finely divided solids, comprising a depot for sampling jars and testing jars, analysis devices for the analysis of samples, manipulators for the movement and positioning of sampling jars, solids dosing devices and dosing devices for liquids. Furthermore, the invention relates to a method for the automatic analysis of finely divided solids.

Abstract: The present invention relates to a solids dosing device for finely divided solids, comprising sampling means for withdrawing a sample from a sampling jar and dosing means for inserting a prescribed amount of finely divided solid material into a testing jar, a dosing accuracy of at least 0.1 g being achieved with the solids dosing device and characteristics of the dosed amount substantially corresponding to those of the sample in the sampling jar. The invention also relates to an automated analyzer for determining properties of finely divided solids, comprising a depot for sampling jars and testing jars, analysis devices for the analysis of samples, manipulators for the movement and positioning of sampling jars, solids dosing devices and dosing devices for liquids. Furthermore, the invention relates to a method for the automatic analysis of finely divided solids.