Rare-Earth Oxalate Precipitation Tank Selection

Storing Rare Earth Oxalate Precipitation? Start Here

If you're working with rare earth oxalate precipitation, you're dealing with a process that involves creating a slurry from rare earth elements and oxalic acid. This is a crucial step in refining rare earth elements, which are essential for various high-tech applications. Whether you're managing a large-scale refinery or a smaller operation, understanding the storage needs for this process is vital to ensure safety and efficiency.

Can you store it in a poly tank?

Yes, but with specific conditions. High-density polyethylene (HDPE) and cross-linked polyethylene (XLPE) tanks are suitable for storing the process solution at ambient temperatures and for less concentrated solutions. However, for higher temperatures and concentrations, fiberglass reinforced plastic (FRP) with vinyl-ester resin or HDPE-lined carbon steel tanks are recommended.

Temperature Control is Key

The rare earth oxalate precipitation process operates at temperatures between 60-80°C. This heat can accelerate corrosion, especially in stainless steel tanks. Therefore, maintaining temperature discipline is crucial, and using materials like FRP or HDPE-lined steel that can withstand these conditions is essential.

The safety that actually matters

• Ensure tanks are compatible with the acidic and corrosive nature of the solution.
• Maintain strict temperature controls to prevent accelerated corrosion.
• Use appropriate gaskets, such as EPDM, for oxalic acid service.

Common questions

What materials are best for high-temperature storage?

FRP with vinyl-ester resin and HDPE-lined carbon steel are best for high temperatures.

Can I use stainless steel tanks?

Stainless steel is not recommended due to pitting from chlorides or nitrates.

What type of gaskets should I use?

EPDM gaskets are standard for oxalic acid service.