Recycling and recovery
MEK recycling
High BTU value, strong recovery economics, and a stream that almost always carries two codes.
Methyl ethyl ketone recovers well by distillation at a boiling point of 80 C, and its high BTU value makes fuels blending a strong fallback where recovery is not viable. Spent MEK is commonly F005 listed, D001 ignitable and D035 toxic.
Source: 40 CFR 261.31 for F005, 40 CFR 261.24 for D035Where spent MEK comes from
- Coatings, lacquer and adhesive manufacturing
- Printing ink and press cleanup
- Surface preparation before painting or bonding
- Magnetic tape and film coating operations
- Resin and polymer processing
Recovery or fuel, and how to decide
MEK carries roughly 13,500 BTU per pound, which makes it a strong cement kiln fuel candidate. Where the stream is clean enough to distill, recovery returns product and is usually the better outcome. Where it is heavily loaded with resin or pigment, fuels blending captures the energy value without fighting the contamination. We price both.
See fuels blendingCommon questions
Why does my MEK stream carry three waste codes?
F005 because MEK is a listed solvent and the formulation exceeded 10 percent before use. D001 because the flash point is below 60 C. D035 if the TCLP extract holds 200 mg/L or more. All three go on the manifest and the most stringent treatment standard governs.
Is MEK still widely used?
Yes, though reformulation has reduced it in some coatings. It remains common in adhesives, printing and surface preparation where its evaporation rate and solvency are hard to substitute.
Does pigment stop recovery?
Heavy pigment loading pushes a stream toward fuels blending rather than distillation, because pigment fouls heat transfer surfaces. The energy value is still recovered, which is why the stream is not simply destroyed.
Related services
Not sure how this applies to your site?
Send a profile, an old manifest, or photographs of the drums. A technical professional will tell you where you stand.
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.