Abstract: A cleaning apparatus for removing residues from the bottoms outflow of an evaporation apparatus which produces tops product and bottoms product and is equipped with an outflow, comprising: a) an outflow vessel (7), b) a collection vessel (8), c) an outflow valve, (10), d) a cleaning water valve (11), e) a vessel outflow valve (12), f) a cleaning outflow valve (13), g) a vent valve (14), h) a line (17) leading from the bottom to the outflow valve (10), i) a cleaning agent introduction tube (3), j) an outflow line device (6, 16) and connection lines between the devices a) to j). The cleaning apparatus can be used in the workup of salt-containing solutions by distillation.

Abstract: This invention relates to a process for preparing and isolating glycols and to a thin-film evaporator which is used in carrying out the process.

Abstract: A process for distilling ethylene oxide out of a mixture including ethylene oxide in a column at an absolute pressure of from 2 to 10 bar and a temperature of 20 to 180.degree. C. by withdrawing pure ethylene oxide in the liquid or gaseous state overhead or via a sidestream in the rectifying section of the column includes effecting the distillation in a column having on its inside a plurality of successive zones of structured sheet-metal packing or dumped beds of packing elements, these zones being assigned one or more extinguishing systems on the outside of the column.