Xuzhou Zhengning Environmental Protection Technology Co., Ltd
Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium
Synonyms: sodium ethylenediaminetetramethylenephosphonate, sodium ethylenediaminetetramethylphosphonate
molecular formula C6H15O12N2P4Na5 Relative molecular weight：546.03
structural formula
EDTMPS is a nitrogen-containing organic polyphosphonic acid, which is a cathode corrosion inhibitor, and the corrosion inhibition rate is 3~5 times higher than that of inorganic polyphosphate. It is miscible with water, non-toxic and non-polluting, has good chemical stability and temperature resistance, and still has a good scale inhibition effect at 200°C. EDTMPS can be dissociated into 8 positive and negative ions in aqueous solution, so it can be chelated with multiple metal ions to form a network complex of multiple monomer structure macromolecules, which are loosely dispersed in water, so that the normal crystallization of calcium scale is destroyed. EDTMPS has a good antiscaling effect on calcium sulfate and barium sulfate scale.
EDTMPS is used as a corrosion and scale inhibitor for circulating water and boiler water, a complexing agent for cyanide-free plating, a chelating agent and an oxygen bleaching stabilizer for the textile printing and dyeing industry.
项 目 | 指 标 |
外 观 | 琥珀色透明液体 |
活性组份(以EDTMPA计)/% | 24.0～26.0 |
活性组分(以EDTMPS计)/% | 30.0～32.6 |
氯化物 (以Cl-计) % | ≤2.0 |
pH(原液) | 6.0～8.0 |
密度（20℃）/g·cm-3 | ≥1.25 |
Fe含量(以Fe计) /mg·L-1 | ≤10.0 |
3.use method
When the circulating cooling water is added separately, the general dose is 2 ~ 10mg/L. The combination of EDTMPS and HPMA in 1:3 ratio can be used for water treatment in low-pressure boilers. EDTMPS can also be used in combination with BTA, PAAS, zinc salts, etc.
4.packaging and storage
EDTMPS is packed in plastic drums, 25kg per barrel or according to user needs. Store in a cool place indoors for 6 months.
5. Security protection
EDTMPS is neutral, pay attention to labor protection during operation, should avoid contact with skin, eyes, etc., should immediately rinse with plenty of water after contact.
Ethylenediamine tetramethylphosphonate sodium EDTMPS
EDTMPS is a nitrogen-containing organic polyphosphonic acid, which is a cathodic corrosion inhibitor. Compared with inorganic polyphosphate, EDTMPS has 3 ~ 5 times higher corrosion inhibition rate. It can be miscible with water, non-toxic and pollution-free, good chemical stability and temperature resistance, and still has good scale inhibition effect at 200℃
The main features and uses of EDTMPS are introduced
EDTMPS is a nitrogen-containing organic polyphosphonic acid, which is a cathodic corrosion inhibitor. Compared with inorganic polyphosphate, EDTMPS has 3~5 times higher corrosion inhibition rate. It can be miscible with water, non-toxic and pollution-free, good chemical stability and temperature resistance, EDTMPS still has a good scale inhibition effect at 200℃.
Introduction to the use of EDTMPS in steam locomotive boilers
Water quality The water quality used by the steam locomotive boiler in our section is of medium hardness. The hardness of carbonate is greater than that of non-carbonate, and the content of evaporation residue is within the regulations of the Ministry.
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