Cleaner Technology Transfer to the Polish Textile ... - Miljøstyrelsen

Detergents and
complexing agents
Figure 5.
Effect of detergent and
complexing agents on
rinsing, 95°C.
Figure 6.
Effect of detergent/complexing
agents on rinsing, 105°C.
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The dye-stuff content in the rinse water versus time, depending on temperature
in the rinse, is plotted out in figure 4. By raising the temperature from 75°C to
95°C it is possible to double the dye-stuff content in the rinse water in the
same process time. At 75°C and 95°C an equilibrium is reached after approx.
30 minutes process time. The curve at 105°C indicates that the dye-stuff is
washed off the textile, and that no equilibrium is reached.
Unlike the temperature, detergents and complexing agents have none or at
worst case have an impeding effect on the dye-stuff hydrolysate rinse. In
figures 5 and 6, the effect of different auxiliary agents on rinsing is outlined.
The dye-stuff content of the rinse water versus time, depending on different
doses of auxiliary agents in proportion to normal dose, is plotted out in figures
5 and 6. The heavy line in figure 5 indicates the temperature during heating:
20 minutes heating from 10°C to 95°C, and subsequently constant at 95°C.
The curve indicates an exponential coherence between temperature and dyestuff
content in the rinse water up to when the constant temperature and equilibrium
is reached. In figure 5 there seems to be no difference between using
normal dose, half dose, quarter dose, or no auxiliary agent.
In figure 6 there is no heating, temperature constant 105° C. The best result is
obtained by no use of auxiliary agent.