Dry Furfural Condenser 1

[Soldador]

Hi guys,

What material should I used for a dry Furfural condenser that we used in the lube plant?. We used this equipment to exchange heat from acircuit containing furfural (solvent) to a cold mix of furfural and hydrocarbon (containing the lubrican to be separated later).

Thanks for your time

 

[25362]

Carbon steel is the norm when the solvent and feed acidities are kept under control, and the feed is well deaerated.

However, if the feed contains naphthenic acidity one would need to go SS 317L, especially on the higher temperature HP furfural vapors vs extract-mix exchangers, and other hot equipment.
Always keep chlorides low, otherwise metallurgies would have to be further upgraded.

The lab should regularly check among others:

1. vacuum gas oil feedstocks for Cl^- content
2. feedstocks for naphthenic acidity
3. circulating furfural acidity
4. inert gas quality

Good luck. If soldador is in Spanish: mucho cuidado y buena suerte.

 

[EdStainless]

The acidity and oxygen are hard on carbon steel. A simple move to 304 stainless won't help if there are any chlorides. Chlorides are the killer. The dulplex 2205 has been used in plants where they can't keep them out of the system.

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Corrosion never sleeps, but it can be managed.

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