Diethylene Triamine Penta (Methylene Phosphonic) Acid - DTPMPA

PHOSPHOMAN®-235

Diethylene Triamine Penta (Methylene Phosphonic) Acid - DTPMPA

DIETHYLENE TRIAMINE PENTA (METHYLENEPHOSPHONIC) ACID

Introduction: PHOSPHOMAN-235 is an organo-phosphonic acid compound exhibiting excellent sequestration of metal ions at stoichiometric concentration and threshold inhibition of metal salt precipitation at sub-stoichiometric concentrations. The ability of PHOSPHOMAN-235 to de-flocculate or disperse solid particles combined with its temperature and hydrolytic stability makes it a versatile ingredient for applications requiring efficient metal ion (like Fe²/Fe³) control.

It is a nitrogenous organic polyphosphonic acid. It shows very good inhibition of the precipitation of barium sulfate (BaSO₄) as well as Strontium Sulfate (SrSO₄). At high alkali and high temperature (above 210 °C) environments DIETHYLENE TRIAMINE PENTA (METHYLENEPHOSPHONIC) ACID has better carbonate, sulfate, and phosphate scale and corrosion inhibition effect than other phosphonates.

Chemical Specifications & properties:

Chemical Name: Diethylenetriamine penta (Methylene phosphonic acid)

(DTPMPA / DTPMP / DETPMP / DETPMPA)

Molecular Formula: C9H28O15N3P5

CAS No.: 15827-60-8

Molecular Weight: 573

Structural Formula:

Property	PHOSPHOMAN-235
State	Liquid
pH (1% solution)	<2.0
Density @ 25 °C	1.42 ± 0.02
Color	Amber aqueous solution
Odor	Mild acidic
Solid Content (min.)	50.0 ± 2.0 %
Chlorides as HCl (%)	15.0 – 17.0
Iron Content (ppm)	< 10.0
Solubility in Water	Soluble in all proportions

*Properties mentioned and color shown in the photo above is for general idea of the product. Actual product property may vary.

MAJOR PROPERTIES:

Scale Inhibition

Threshold effect” is the ability of very small amounts of scale inhibitors to keep large quantities of scale forming minerals in soluble form. DTPMP are highly effective scale inhibitors working on threshold limit. This is due to DTPMP Chemical being adsorbed on the growth site of the scale forming minerals like Calcium, Magnesium, Strontium, Barium, and Silica etc. altering the growth pattern of the scale, reducing the speed of growth and distorting the crystals. The threshold inhibition effectiveness of Diethylene Triamine Penta Methylene Phosphonic Acid depends on conditions such as the type of scale forming mineral, water composition, super saturations, temperature, pH and the type of DTPMP itself.

Sequestration

Sequestration (or chelating) is the ability of the substance to form a stable water soluble complex with metal ions. The sequestration efficiency depends mainly on pH and the presence of other ions. The best comparison, however, can be made by the customer under actual use conditions.

Dispersion

Deflocculating or dispersion is the phenomenon that makes the agglomeration of growing crystals and other particulates more difficult. DTPMPA Chemical have this property and also have the added attribute of maintaining such systems in a dispersed state over extended periods due to superior hydrolytic stability.

Corrosion Control

Corrosion occurs when metal is attacked by oxygen in water. DTPMPA Chemical in combination with zinc or phosphates and other corrosion inhibitors are highly effective in inhibiting corrosion. The effect of these combinations is much greater than the effect of any component by itself.

Hydrolytic Stability

DTPMPA are highly resistant to hydrolysis over a broad range of pH and temperature. This is very important for liquid formulations or where the process liquid is at elevated temperatures.

Chlorine Stability

Chlorine is a common oxidizer and biocide widely used in a variety of applications. Because Diethylene Triamine Penta Methylene Phosphonic Acid DTPMP are stabilized with additives against chlorine (halogen) attack they perform maximum chlorine stability.

APPLICATION

PHOSPHOMAN, we manufacture, are widely used in:

•    Cooling Water Treatment
•    Boiler Treatment
•    Soap / Detergent Formulations
•    Top Side Oil Field Application
•    Squeeze Treatment in Oil Recovery
•    Industrial and Institutional Cleaning
•    Reverse Osmosis Desalination
•    Peroxide stabilization
•    Paper and Pulp Bleaching
•    Textile Bleaching
•    Cosmetics
•    Deflocculating of Kaolin Slurries
•    Textile Scouring
•    Aluminum Etching
•    Swimming Pool Chemicals
•    Trace Metal Carrier in Fertilizers
•    Railway Carriage Cleaning
•    Ore Flotation
•    Acid Cleaners
•    Bottle Washing Formulations
•    Cement Retarders
•    Metal Passivation
•    Geothermal Water Treatment
•    Car Cleaning Formulations
•    Deinking Formulations
•    Photography
•    Sugar Refining
•    Leather Chemical Formulations

MEASUREMENT REPORT OF A STANDARD STATIC TEST (SIMPLIFIED) FOR SCALE INHIBITION

(A) STANDARD SOLUTIONS

1. Calcium chloride solution: Prepare exactly 1.0 litre by dissolving 1.125gm CaCl2.2H2O (LR) in DM water using a volumetric flask.

2. Sodium bicarbonate solution: Prepare exactly 1.0 litre by dissolving 1.32gm of NaHCO3 (LR) in DM water using a volumetric flask.

3. Product (ANTISCALANT) solution: Prepare 0.1% w/w inhibitor solution using DM water.

4. EDTA solution (0.01M): Take 3.768gm EDTA disodium salt (LR) and make it exactly 1.0 litre with DM water using a volumetric flask.

(a) Standardization of EDTA solution: Weight accurately 0.02gm of zinc metal and transfer in to 250ml capacity conical flask. Add 50.0ml of distilled water and 5.0ml of conc. Nitric acid. Boil it up to complete dissolution of zinc metal and then cool it. Add 2 to 3 drops Xylenol orange indicator which shows yellow color then add Hexamine (LR) till solution become purple in color, add 1 to 2gm excess Hexamine (LR) till solution become purple in color. Add 1 to 2gm excess Hexamine (LR). Prepare total of three sets and titrate them against 0.01M EDTA solution.

(b) End point: purple to yellow.

(c) Calculation:

(B) STANDARD TEST METHOD

1. In one clean stopperd glass bottle take 50.0ml solution of Calcium Chloride (A-1) and 50.0ml solution of sodium bicarbonate (A-2). Mix well and titrate it against 0.01M EDTA solution. Calculate for initial hardness of the media as follows:

Take exactly 50.0ml solution and titrate it against standard 0.01M EDTA solution from the burette. Note the burette reading in millilitre (ml).

2. (A) In five numbers of clean stopperd glass bottles (200ml capacity); numbered 1 to 5, place 50ml of CaCl2 (A-1) solution. Add 1.0ml, 2.0ml, 3.0ml, and 4.0ml of 0.1% inhibitor solution (product) (A-3) to the first four bottles (1 to 4) respectively. Add 1.0ml distilled water to the fifth bottle (blank). Shake the bottles well.

2. (B) Now, add 50ml. of the NaHCO3 solution (A-2) in all five bottles. Shake all the bottles well and place them in constant temperature oven / water bath set previously at 65°c. Allow to equilibrate for 24 hours. The set of bottles now contains 10ppm, 20ppm, 30ppm and 40ppm of the inhibitor in the first four bottles; the fifth bottle is control (blank).

2. (C) Remove the bottles from oven / water bath after 24 hours and cool to room temperature. Filter the solutions through a Whatman 42 filter paper and analyse against a standard 0.01 M EDTA solution for hardness.

CALCULATIONS FOR CALCIUM CARBONATE INHIBITION

The efficiency of the inhibitors is calculated as follows:

NOTE: ALL RESULTS, OUT LINED BELOW ARE COMPARATIVE TO THE BLANK

CORROSION BEHAVIOUR OF PHOSPHOMAN-235 PHOSPHONATE

The corrosion-producing potential of Phosphoman-235 Phosphonate on the materials used in the cooling water circuit is extremely low. All types of fine-steel alloys and titanium materials remain unchanged with respect to their corrosion behaviour in the presence of Phosphoman- 235 Phosphonate at the application concentrations. Nickel-based alloys can be considered to be analogous to the fine-steels.

Under the test conditions described below, normal steel alloys (SS 316) and comparable alloys showed slight indications of passivation. With respect to concrete materials there are no indications of corrosion.

The corrosion tests were carried out with a simple lab test. In all the tests performed the product concentration was 200 ppm which is dosed at a higher side than the normal concentration. Testing of the materials was carried out in comparison to unconditioned tap water. In practice many of the results of the laboratory tests have been confirmed. No impairment of the corrosion behaviour compared to other traditional phosphonate products used previously has been ascertained.

REPRESENTATIVE CORROSION TEST EXAMPLE

(SHORT PERIOD-HIGHER DOSE-HIGHER TEMPERATURE)

CONDITIONS

Media: water

Product name: Phosphoman-235

Product dose: 200ppm

Metal: SS 316

Temp: 90°c

Time: 4 hours

CONCLUSION: The resulting corrosion rate of 0.005% is very low even at higher dose as well as higher temperature and very good for practical applications

Safety and Handling: PHOSPHOMAN-235 is an acidic material. Do not take internally. In case of contact with skin, wash with plenty of water. In case of contact with eyes, flush with water and get prompt medical attention. Gloves and goggles are necessary while handling the product.

Storage: PHOSPHOMAN-235 is nonflammable, and noncombustible. It should be stored under shade. Keep the product away from direct sunlight.

Packing: PHOSPHOMAN-235 is available in 65Kg Carboy / 270Kg Polydrum / 1250Kg IBC

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