System for the water softening by means of precipitation water softening

摘要

The new water softening the method makes it possible, with high soda hold formulations in hard water to operate without disturbing calcium carbonate deposits on the laundry and the washing devices occur. The basic idea of the invention is a stepwise softening of the water with simultaneous dispersion of the disturbing precipitates. For this purpose, in addition to the precipitation of the softening agent of sodium carbonate very quickly with the water hardness reacting soap used. In this case, in the first reaction is formed immediately insoluble calcium soap, the slower reacting sodium carbonate, calcium, there is thus no longer in water, and it is no further precipitation reactions take place. In order that no disturbing, flaky calcium soap fails, this must be dispersed immediately. This is done according to the invention, by means of very active dispersants, such as, for example, polyaspartate. Such as washing tests show, the air in the formulations, the sodium carbonate / soap mixtures and the active dispersant sokalan cp5, no deposits of calcium carbonate on dne textile fibres and the washing devices.