[ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, sodium salt

• CAS: 22036-77-7
• Catalog Number: ACM22036777
• Category: Main Products
• Molecular Weight: 524.05
• Molecular Formula: C6H16N2Na4O12P4
• Synonyms: EDTMP sodium salt
• Appearance: Yellow brown transparent liquid

Case Study

High-Temperature Cement Retarder System Using EDTMP Sodium Salt for Enhanced Slurry Stability in Oil Well Applications

Staude, Dominik, et al. Heliyon 10.19 (2024).

This study evaluated the performance of sodium ethylenediamine tetra(methylene phosphonate) (EDTMP sodium salt) in combination with borax as a non-dispersing high-temperature retarder system for oil well cementing. The system addresses critical challenges related to thermal thinning and particle sedimentation encountered at temperatures exceeding 120 °C, which can compromise zonal isolation and well integrity.
EDTMP Sodium Salt/Borax Retarder System
The EDTMP sodium salt/borax system was developed to provide effective retardation while minimizing thermal thinning. Key features of the system include retarder dosage range (0.97-2.64% by weight of cement (bwoc)), optimal EDTMP/borax ratio: 0.29-0.34, applicable across a wide temperature range (50-200 °C) and high-pressure conditions (up to 19.0 kpsi).
Key Results
· Thickening Performance: Achieved controlled thickening times of 7-13 hours, adaptable to increasing temperatures.
· Slurry Stability: Demonstrated consistent pumpability (10-25 Bc) and rapid setting with subsequent compressive strength development.
· Thermal Resistance: Significantly reduced thermal thinning at temperatures up to 200 °C.
· Compatibility: Showed promising compatibility with common fluid-loss additives.
· Dosage Sensitivity: Exhibited high efficiency but required precise dosing, particularly at moderate temperatures.

Enhancing Scheelite Flotation Efficiency Using EDTMP Sodium Salt as a Selective Calcite Depressant

Jiao, Fen, et al. International Journal of Mining Science and Technology 33.5 (2023): 639-647.

The purpose of this work was to explore the effect and mechanism of ethylenediamine tetramethylene phosphonic acid sodium salt (EDTMP sodium salt) as a new selective calcite depressant for scheelite flotation. The EDTMP sodium salt has a high chelating ability due to the four phosphonate groups per molecule of EDTMP sodium salt, and it can selectively adsorb on the calcite surface, increase the hydrophilicity and inhibit the adsorption of collectors on calcite, and has little effect on scheelite.
Methods
Flotation experiments were conducted using artificially mixed minerals at pH 9.5 with sodium oleate (NaOL) as the collector and EDTMP sodium salt as the depressant. Surface analysis included contact angle measurements, FTIR, zeta potential, and XPS were used to study adsorption mechanisms. WO3 grade, recovery rate, and separation efficiency were evaluated as performance metrics.
Key Results
· Under optimized conditions (pH=9.5, NaOL=1.5×10^-4 mol/L, EDTMP=3.0×10^-5 mol/L), a scheelite concentrate with 65.49% WO3 grade, 83.29% recovery, and 65.29% separation efficiency was achieved.
· EDTMP sodium salt strongly adsorbed onto calcite via phosphonate-calcium interactions, preventing NaOL adsorption and enhancing hydrophilicity.
· Adsorption on scheelite was weak, allowing collector attachment and maintaining hydrophobicity. The reagent demonstrated high selectivity, low environmental impact, and compatibility with standard flotation processes.

Custom Q&A

What is the molecular formula of [Ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, sodium salt?

The molecular formula is C6H16N2Na4O12P4.

What is the molecular weight of [Ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, sodium salt?

The molecular weight is 524.05 g/mol.

What are some synonyms for [Ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, sodium salt?

Some synonyms include tetrasodium;[2-[bis[[hydroxy(oxido)phosphoryl]methyl]amino]ethyl-[[hydroxy(oxido)phosphoryl]methyl]amino]methyl-hydroxyphosphinate.

When was [Ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, sodium salt first created in the PubChem database?

It was first created on November 11, 2015.

What is the IUPAC name of [Ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, sodium salt?

The IUPAC name is tetrasodium;[2-[bis[[hydroxy(oxido)phosphoryl]methyl]amino]ethyl-[[hydroxy(oxido)phosphoryl]methyl]amino]methyl-hydroxyphosphinate.

What is the InChIKey of [Ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, sodium salt?

The InChIKey is HWBBOUHGZNBHSW-UHFFFAOYSA-J.

What is the hydrogen bond donor count of [Ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, sodium salt?

The hydrogen bond donor count is 4.

What is the hydrogen bond acceptor count of [Ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, sodium salt?

The hydrogen bond acceptor count is 14.

What is the rotatable bond count of [Ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, sodium salt?

The rotatable bond count is 11.

How many covalently-bonded units are present in [Ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, sodium salt?

There are 5 covalently-bonded units in the compound.