Ammonium oxalate

Name: Ammonium oxalate
SKU: ACM1113388
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CAS

1113-38-8

Catalog Number

ACM1113388

Category

Main Products

Molecular Weight

124.10

Molecular Formula

C2H8N2O4

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Specification

Synonyms

Diammonium oxalate

Boiling Point

230.85°C

Appearance

Colorless columnar crystal

Study of Ammonium Oxalate Monohydrate Minerals Using Theoretical Solid-State Methods

Colmenero, Francisco. Journal of Physics and Chemistry of Solids, 2019, 125, 31-42.

In order to study the structural, spectroscopic and thermodynamic properties of the ammonium oxalate mineral oxalate monohydrate [(NH4)2(C2O4)H2O], a theoretical solid-state approach was adopted. This work investigates the use of plane waves and pseudopotentials in theoretical solid-state calculations based on periodic density functional theory (DFT).
Key properties of ammonium oxalate monohydrate
· The structural properties that were calculated, including lattice parameters, bond lengths and angles, and X-ray powder diffraction patterns, matched well with the experimental results obtained from low temperature X-ray diffraction data.
· The bands observed at 2344, 2161, 1933, and 1902 cm-1, as well as the 815 cm-1 band, were determined to be combination bands not accounted for in the computed spectrum. Additionally, it was confirmed that the band at 2879 cm-1 was an overtone.
· The calculated specific heat at 323 K was Cp=202.3 k/J/mol, which closely matched the experimental value. Additionally, the enthalpies and free energies of formation for oxammite were determined based on the elements and thermodynamic properties of its thermal decomposition reaction. These findings revealed that the crystalline material of ammonium oxalate monohydrate begins to decompose at a relatively low temperature of 288 K.

Ammonium Oxalate Leaching to Recover Vanadium from Vanadium Slag

Li, Meng, et al. Jom, 2017, 69, 1970-1975.

Ammonium oxalate [(NH4)2C2O4] can be used as a leaching medium to recover vanadium from vanadium slag after non-salt roasting. In this non-salt roasting ammonium oxalate leaching (NRAL) strategy, the chromium spinels in the raw vanadium slag cannot be converted into carcinogenic chromates at roasting temperatures. In addition, ammonium oxalate is almost non-volatile below 90°C, avoiding expensive and complicated ammonium control operations.
Non-salt roasting ammonium oxalate leaching procedure
· In the process of non-salt roasting, 50 g of vanadium slag was placed in a corundum boat and roasted in a tube furnace. Once the roasting was completed, the slag was cooled with air to room temperature and then crushed using an agate mortar before being sieved to produce fine powders ranging from 48-75 μm.
· The roasted slag underwent leaching in a glass container placed in a temperature-controlled water bath. The setup included a reflux condenser, Teflon-protected mechanical stirring for agitation. The leaching process involved roasted vanadium slag particles sized 48-75 μm, ammonium oxalate concentrations ranging from 5-15% by weight, a solid to liquid ratio of 1:4 (50 g slag and 200 g solution), temperatures between 30-90°C, leaching times from 1-120 min, and stirring at 300 rpm. Following leaching, the slurry was filtered, and the resulting filter cake was rinsed with deionized water.

Quantifying soil available P pools using acidic ammonium oxalate

Relationships between accumulated plant P and oxalate extractable P in five highly weathered soils.

Guo, Fengmao, and Russell S. Yost. "Quantifying the available soil phosphorus pool with the acid ammonium oxalate method." Soil Science Society of America Journal 63.3 (1999): 651-656.

For fertilization recommendations, measurements of available soil P pools are needed. Extractants capable of estimating this P pool are needed. The utility of the acidic ammonium oxalate method in estimating available soil P pools in different soils was explored. Oxalate extracts in the dark primarily dissolve reactive non-crystalline Fe and Al in soils. Oxalate extractable P (P) has rarely been studied for predicting available P pools in highly weathered soils, where Fe and Al oxides are typically abundant. Pin was estimated for 5 highly weathered soils and 3 mildly weathered soils amended with varying amounts of P.
Adjust solution pH to 3.0 with dilute HCl or NH4OH. Add 30 mL of 0.2 M ammonium oxalate solution to duplicate 0.5 g soil samples in screw-cap centrifuge tubes to extract P. Immediately place the sealed centrifuge tubes in a covered box to eliminate light and shake for 2 h. After shaking, the tubes were centrifuged for 10 min and the supernatant from each tube was poured into a plastic tube. An aliquot (usually 1 mL) of the extract was evaporated to dryness in a heated oven. The residue was ashed at 500°C for 1 h and redissolved.

Study on the activation characteristics of ammonium oxalate on lime system

Flotation recovery and pulp pH of pyrite and arsenopyrite in the lime system as a function of the ammonium oxalate concentration.

Liao, Runpeng, et al. International Journal of Minerals, Metallurgy and Materials 30.2 (2023): 271-282.

The activation characteristics of ammonium oxalate on the flotation of pyrite and arsenopyrite in lime system were studied. Single mineral flotation tests showed that ammonium oxalate strongly activated pyrite in high alkalinity and high calcium systems, while arsenopyrite was almost unaffected. In the mineral mixture test, the difference in the recovery of pyrite and arsenopyrite after the addition of ammonium oxalate was greater than 85%. The hydrophobicity of pyrite increased significantly after treatment with ammonium oxalate and ethyl xanthate, and the contact angle increased from 66.62° to 75.15° and then to 81.21°. Ammonium oxalate can be used as a selective activator for pyrite in lime system to achieve efficient flotation of S-As sulfide ores under high alkalinity conditions.
The mineral sample was mixed with 30 mL of deionized water and added to the flotation cell at a speed of 1600 r/min. The pH value was measured by a pH meter. After ultrasonic cleaning and flotation stirring for 1 min, lime, ammonium oxalate, PEX and pine oil were added to the pulp in sequence. After 3 min of flotation, the floating and sinking materials were collected and dried, and the recovery rate was calculated based on the weight of the dried products. The test was repeated 3 times and the average value was obtained.

What is the molecular formula of ammonium oxalate?

The molecular formula of ammonium oxalate is C2H8N2O4.

What are the synonyms for ammonium oxalate?

The synonyms for ammonium oxalate are Diammonium oxalate, Ethanedioic acid diammonium salt, and Ethanedioic acid, diammonium salt.

What is the molecular weight of ammonium oxalate?

The molecular weight of ammonium oxalate is 124.10 g/mol.

What is the parent compound of ammonium oxalate?

The parent compound of ammonium oxalate is Oxalic Acid.

What are the component compounds of ammonium oxalate?

The component compounds of ammonium oxalate are Ammonia and Oxalic Acid.

What is the physical description of ammonium oxalate?

Ammonium oxalate is an odorless solid that sinks and mixes slowly with water.