What are the specific applications of DTPMPA in textile printing and dyeing?

DTPMPA (diethylenetriaminepenta-methylenephosphonic acid) is widely used in the textile printing and dyeing industry, it plays an important role in improving the quality of printing and dyeing, preventing the scaling of equipments, acting as chelating and dispersing agent, etc., and it is environmentally friendly. The following are the specific applications and advantages of DTPMPA in the textile printing and dyeing industry:

Improvaent of printing and dyeing quality

Chelating metal ions:

DTPMPA can form stable complexes with metal ions in water, effectively inhibiting the deposition of metal ions and scale formation, which is very important for improving the color quality and preventing color changes in the printing and dyeing process.

For example, during the printing and dyeing process, DTPMPA can chelate calcium, magnesium and other hard water components in the water, preventing these metal ions from reacting with the dyes, thus improving the color vividness and fastness of the printed and dyed products.
Stabilizes hydrogen peroxide:
DTPMPA as a peroxide stabilizer, especially in high taperature conditions peroxide stabilization effect is good, which is important for stabilizing hydrogen peroxide in the process of deinking pulp peroxide bleaching, reducing ineffective decomposition and improving bleaching efficiency.

Improvaent of whiteness:

Using DTPMPA as an additive for one p of hydrogen peroxide bleaching, the ISO whiteness of bleached pulp can reach 58%, which is 2.5% higher than that of using DTPMPA alone, the ISO whiteness is increased.
Prevent equipment scaling

Scale inhibition effect:

DTPMPA can inhibit the generation of carbonate and sulfate scale, and has better scale and corrosion inhibition performance than other organic phosphines in alkaline environment and under high taperature (above 210℃).
Use DTPMPA alone in compounding agent, no need to add dispersant, the amount of fouling deposition is still very small.
High taperature resistance:
DTPMPA has good taperature resistance, even under the conditions of up to 210 ℃ can still play an effective scale inhibition effect.
Environmental adaptability:
DTPMPA is especially suitable for alkaline circulating cooling water as scale and corrosion inhibitor without pH adjustment, and can be used as scale and corrosion inhibitor for oilfield injection water and cooling water and boiler water containing high barium carbonate.
As chelating and dispersing agent
Chelating ability:
DTPMPA forms stable complexes for various metal ions of calcium, magnesium, copper and iron, and can dissolve the oxides on the metal surface.
Dispersing effect:
DTPMPA acts as a dispersant of pigments to improve the stability and uniformity of pigments, which is essential to maintain the color uniformity of printed and dyed fabrics.
Bifunctional additives:
DTPMPA can be used as part of a bifunctional additive to both stabilize hydrogen peroxide bleaching and inhibit silicate scaling, which is promising for use in hydrogen peroxide bleaching of deinking pulp.

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