Structural formula and preparation method of sodium diethylenetriaminepentaacetate

Sodium Diethylenetriamine Pentaacetate (DTPA-Na)

[Structural formula]

[Physical and chemical properties] Sodium diethylene triamine pentaacetate, appearance is colorless or light yellow liquid, content ≥90%, ignition residue ≤0.

[Preparation method] After chloroacetic acid and sodium hydroxide are neutralized, sodium chloroacetate and diethylene triamine are reacted at low temperature , and the resulting product is purified to obtain the product DTPA

① The purification raw material of diethylenetriamine requires an effective content of more than 90%, and its impurities are generally derivatives of diethylenetriamine, which can be separated by distillation and collect fractions at 204～208℃

②The content of chloroacetic acid purification industrial products should be greater than 95% according to the national standard.

③Add chloroacetic acid in the proportion of raw materials into the reactor, add sodium hydroxide solution with good solubility, and then drip diethylenediamine and concentrated hydrochloric acid at constant pressure.

[Technical Index]

[Application] DTPA has complexing or chelating effect on calcium, magnesium and iron scale-forming ions, and has a good scale-dissolving effect

When this product is used as a chelating cleaning agent for non-stop oven cleaning, the net chelating agent dosage (ie, the chelating agent dosage minus the chelating dosage consumed by condensing water) is generally 0.