Advanced NMP Recovery Systems for Lithium Batteries – Zschemistry
Overview of N-Methyl-2-Pyrrolidone (NMp) Recovery Systems
N-Methyl-2-pyrrolidone (NMp) Recovery Systems are specialized HVAC systems designed to remove NMp and other volatile organic compounds (VOCs) as well as hazardous air pollutants (HAps) from industrial process exhaust streams, particularly in battery manufacturing.
NMp is an organic solvent widely used in various industries, including:
- Battery production: As a solvent for lithium-ion battery cathode materials
- Hydrocarbon extraction: For lube oil extraction and petrochemical processing
- Pharmaceuticals: As a drug solubilizer and penetration enhancer
- Electronics: In formulations for active pharmaceutical ingredients, drug delivery systems, etc.
NMp recovery systems allow manufacturers to meet emission regulations while also enabling the reuse of this valuable solvent, optimizing production costs. The recovery process typically involves extracting and purifying NMp from gas phase streams through techniques like flash evaporation, distillation, and gas stripping. Solvent dehydration is also often employed to prevent water buildup in the recovered NMp.
By implementing these NMp recovery technologies, industrial facilities can minimize waste generation and drive sustainability through the recirculation of this versatile organic compound. The recovered NMp can then be reintegrated back into manufacturing processes, creating a more closed-loop and cost-effective operation.
How N-Methyl-2-Pyrrolidone Recovery Systems Work
N-Methyl-2-pyrrolidone (NMp) recovery systems use three main process steps to extract and purify NMp from industrial gas streams:
1. Adsorption
Exhaust air from lithium-ion battery manufacturing is passed through a zeolite wheel, which captures the NMp emissions at room temperature.
2. Desorption
The zeolite is rotated to the Desorption airflow, where it is heated to 300-400°F, releasing the NMp solvent into a small volume, concentrated air stream.
3. Distillation
The solvents are separated into their components at lower-than-boiling point temperatures, with waste removed and clean solvent left.
The NMp recovery process can enable the reuse of NMp and minimize waste generation. Up to 95 percent of the used NMp can be recovered.
NMp is an organic compound that is a colorless liquid, though impure samples can appear yellow. It is miscible with water and with most common organic solvents. It is used in the petrochemical, polymer, and battery industries as a solvent, exploiting its nonvolatility and ability to dissolve diverse materials.
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n-hexaneOil was extracted from oil seeds using the traditional process of solvent extraction. In olvent extraction, n-hexane was used as an olvent due to its strong electivity to olvent, high imple recovery, non-polar nature, and low latent heat of vaporization (330 kJ/kg).
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According to the invention, methanol can be eliminated by mixing water with the ohexane and methanol solution. This method is simple to use and labor- and time-saving, uses inexpensive deionized water, and uses a mild treatment process without creating any danger.
Hexane is a widely used solvent for extraction since it has a low volatile organic content, is safe to use with high-quality products, and emits no unpleasant fumes or odors. All of this made hexane seem like a safe, fast, and simple solvent to use for extraction, especially given its low boiling point.
N-Methyl-2-Pyrrolidone Recovery System Products
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