Recycling and recovery
Toluene and xylene recycling
Aromatic solvents with strong recovery and fuel value, and a benzene question worth asking.
Toluene and xylene both recover well by distillation and carry high BTU value for fuels blending. Toluene is F005 listed and xylene is F003 listed, and both are D001 ignitable. Streams from refining or coke operations should also be assessed for D018 benzene.
Source: 40 CFR 261.31, and 40 CFR 261.24 for D018Where these streams come from
- Paint, coating and lacquer manufacturing and line flush
- Adhesive and sealant production
- Printing and gravure operations
- Rubber and polymer processing
- Laboratory extraction and analytical work
The benzene question
Toluene and xylene from petrochemical, refining or coke sources can carry residual benzene. That matters because D018 applies at 0.5 mg/L in the TCLP extract, which is a low threshold, and because benzene changes both the handling requirements and the disposal economics.
A stream from a coatings plant that bought clean virgin solvent is a different proposition from a stream that came off a refinery unit. The determination has to reflect the source, not just the solvent name on the drum.
Common questions
Can toluene and xylene be recovered together?
They can be distilled together where the recovered mixture is acceptable for reuse, which it often is in cleaning applications. Separating them needs fractional distillation and only pays where both are wanted individually.
What is the BTU value?
Both sit in the range of 17,000 to 18,000 BTU per pound, which is high. That makes them strong cement kiln fuel candidates when recovery is not viable.
Do I need to test for benzene?
If the stream has any petrochemical, refining or coke origin, yes. Process knowledge can be sufficient where the solvent was purchased virgin and the process introduces no benzene, but that reasoning has to be documented.
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This page summarizes federal requirements and is not legal advice. State programs can be more stringent than the federal baseline. Verify against current federal and state regulations before acting. Last reviewed September 2026.