Abstract: Process for reducing the metal ion content in a chemical compound having a dipole moment or a mixture of two or more thereof to 1 ppb or less by distillation with supply of the energy required for vaporizing the chemical compound or the mixture of two or more thereof in the form of electromagnetic waves having a frequency in the range from 1 MHz to 50 Ghz.

Abstract: A device for connecting at least a discharge tube and return tube to a bung connection of a container for liquids and the like, said connection being embodied with inner screw thread, which device comprises a cylindrical insert with screw thread arranged on the cylinder outer wall and co-acting with the bung, in addition to a bottom provided with at least two openings, a tube connecting bung for placing with the lower surface on this bottom and provided with passages for the discharge tube and return tube aligned with these openings, and a clamping piece for fixing the connecting bung in the cylindrical insert via connectors wherein there are arranged lugs placed in a determined pattern and recesses receiving these lugs, wherein the clamping piece is connected non-slidably in axial direction to the bung but freely rotatable relative thereto, and wherein the connectors in the insert are arranged at a distance from the bottom in order to form a chamber, the recesses are placed above the chamber in the insert an

Abstract: A device for connecting at least a feed off and return tube to a bung-hole of a container for liquids and the like having threads at its inner periphery, said device comprisinga cylindrical insert having threads at its outer periphery co-operating with the thread of the bung-hole, and a bottom part provided with at least two orifices,a tube mounting having a lower surface to be placed on the bottom of said insert and provided with ports being in communication with said orifices of the insert, anda clamp means to clamp said mounting into said insert,wherein the tube mounting and the insert are provided with lugs and co-operating recesses located according to a certain pattern, wherein a recess is arranged in the wall of an orifice debouching in the bottom of said cylindrical insert, and the co-operating lug protrudes axially out of the tube mounting or vice versa, such that with only two lugs a large number of coding possibilities is provided for.