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Spent acids resulting from nitration processes e.g.
- Nitro-cellulose (NC)
- Nitrobenzene (NB)
- Nitro-glycerine (NGL)
- Ethyleneglycoldinitrate (EGDN)
- Diethylenglycoldinitrate (DEGDN, DEGN)
- Metrioltrinitrate (MTN)
- Butanetrioltrinitrate (BTTN)
- Nitroguanidine (Nigu)
- Nitrotoluene (MNT)
- Dinitrotoluene (DNT)
- Trinitrotoluene (TNT)
- Picric Acid
- Penta (PETN)
- Hexogene (RDX)
- Octogene (HMX)
- Dinitroanisole
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Stabilization
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Both acid types are treated similar for stabilization in a combined chemo-thermical process step where the organic compounds are destroyed in a controlled and safe way.
The treatment conditions are tailor made for the contaminants to avoid foaming and spontaneous development of gas.
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Denitration
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While stripping in a special column using air or steam which can be life or generated steam by indirect heating, dissolved nitrous gases originating from the nitration process or generated during the stabilization step are removed.
The nitric gases can be recovered as nitric acid using the PLINKE pressure absorption unit.
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