Chelating Resin for Brine purification,MC:50.0-62.0%

Catalog Number	ACMA00033714
Application	·Secondary brine refining in the ion-exchange membrane caustic soda industry ·Tungsten and Molybdenum Separation
Bulk Density	0.70-0.80g/ml
Color Form	Brown
Effective Size	0.4 - 0.7mm
Functional Group	Tertiary Amine
Ionic Form	Na+
Max Temperature Range Limited	120℃ (212°F)
Moisture Content	50.0-62.0%
Nature	Cationic
Particle Size Range	0.315-1.25mm(≥95)
pH Range	9.0±0.5
Physical Description	Spherical Beads
Polymer Structure	Styrene
Polymer Type	Macroporous
Shipping Weight	0.68-0.76g/mL
Type	Styrene macroporous resin
Uniformity Coefficient	≤1.6
Volume Capacity	≥0.6meq/ml
Whole Beads	≥90%

Frontier Research

Polyhydroxy Chelating Resin for Removal of Tungsten from Molybdate Solution

Huo G, et al. Hydrometallurgy, 2014, 147, 217-222.

The ion exchange selective adsorption of tungsten (W) from molybdate solution by polyhydroxy chelating resin was studied by batch and column experiments. The functional group of the polyhydroxy chelating resin is methylglucamine group, which contains one tertiary amino group (-N(CH3)2) and five hydroxyl groups (-OH).
Evaluation method and results
· Concrete batch tests have shown that the polyhydroxy chelating resin performs well at a pH of greater than 8.0, where W and Mo are present in the forms of WO₄^2- and MoO₄^2-, respectively. This indicates that the polyhydroxy chelating resin exhibits a higher affinity for WO₄^2- than MoO₄^2-.
· In solutions with Mo/W mass ratios of around 100, the separation factors for W over Mo were found to be above 22, with Mo concentrations ranging from 30 to 100 g/L. Desorption tests on the polyhydroxy chelating resin revealed that both W and Mo could be easily eluted from the resin using 1 mol/dm3 NaOH for just 1 hour.
· Column experiments further confirmed the polyhydroxy chelating resin's ability to separate W in sodium molybdate or ammonium molybdate systems, with W removal rates ranging from 93.35% to 97.56%. The polyhydroxy chelating resin allows for the removal of W from molybdate solutions with minimal pre-treatment.

Q&A

What is the purpose of chelating resins?

The purpose of chelating resins is to provide superior selectivity for specific target ions in challenging separations.

How do chelating resins work differently from ion exchange resins?

Chelating resins form strong complexes with the target ion and the functional groups on the resin, whereas ion exchange resins exchange ions.

How can chelating resins be regenerated?

Chelating resins can be regenerated by disrupting the complex formation or by using a competing ligand that is more favorable than the resin functional group.

In what applications are chelating resins commonly used?

Chelating resins are commonly used in metal removal and recovery applications, including the primary recovery of precious metals and the removal of impurities in high purity processes.

What is brine decalcification in the chlor-alkali industry?

Brine decalcification refers to the process of removing calcium from brine in the chlor-alkali industry using chelating ion exchange resins.

What is resin-in-pulp (RIP)?

Resin-in-pulp is a method for capturing base metals such as copper, nickel, cobalt, and zinc using chelating ion exchange resins.

What is the application of chelating resins in the removal of hexavalent chromium?

Specific chelating resins can be used to remove hexavalent chromium from potable water.

What is the application of chelating resins in the removal of boron?

Specific chelating resins are used to remove boron in semiconductor process water.

What is one application of chelating resins in the recovery of precious metals?

Specific chelating resins are used for the recovery of high-value precious metal catalysts.

Can chelating resins be used to remove mercury?

Yes, specific chelating resins can be used for the removal of mercury, whether regenerable or non-regenerable.