IMPROVED PROCESS FOR DRYING VALUABLE SUBSTANCES USEFUL FOR WASHING AND CLEANING AGENTS BY MEANS OF OVERHEATED STEAM

摘要

Interest income or mixtures of hydrated interest products which are suitable as wetting agents, detergents and / or cleaning and / or in the manufacture of these various agents and can also be aqueous preparations are dried with steam superheated water as the drying gas. This is then returned to the stage after drying outward transfer of the amount of water evaporated in the circuit. To obtain a dried product of high quality, in particular a light color and / or no deposit carbonate, the energy input required for evaporation of water is supplied to the vapor recycle stream at least predominantly by indirect heat exchange.