Size an on-site solvent distillation unit around the dirty solvent you generate, the batches you can run, the purity you need, and the hazardous-waste costs you can actually avoid.
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Quick answer: recover the solvent, concentrate the contamination
A solvent recycler is a still built to recover reusable solvent from a contaminated stream. It heats dirty solvent, sends solvent vapor through a condenser, and collects liquid distillate. Paint solids, resins, oils, pigments, and other higher-boiling contamination remain as still bottoms for proper disposal.
- Load. Put a compatible dirty-solvent batch into the distillation vessel.
- Heat. Indirect heat through thermal oil raises solvent into its controlled boiling range.
- Condense. Vapor leaves less-volatile contamination and returns to liquid in the condenser.
- Recover. Collect qualified solvent, cool the unit, and manage still bottoms correctly.
Distillation separates by volatility. It does not automatically remove every close-boiling solvent, water, dissolved contaminant, or additive. Test recovered quality against the reuse requirement.
Capacity: size by gallons of dirty solvent per day
Use measured waste generation, not solvent purchases, as the starting point.
- Record dirty-solvent gallons by day and week for a representative period.
- Separate streams that should not be mixed.
- Confirm usable batch fill, not only nominal vessel size.
- Divide daily dirty solvent by practical batches per day.
- Check cycle time, cooldown, residue removal, bag changes, and staffing.
- Add capacity for peak days, growth, maintenance, and downtime.
- Verify power, compressed air, floor space, loading, collection, and residue handling.
A small unit can process substantial weekly volume if cycles fit the shift. A large unit can still bottleneck if the solvent needs a long cycle or the shop cannot unload residue between batches.
Payback vs. hauling: model the costs you stop, and the costs you add
Annual value
- Fresh solvent purchases displaced
- Waste pickup, transport, and disposal avoided
- Drum handling and administration reduced
Annual operating cost
- Electricity and compressed air
- Bags, thermal oil, seals, and maintenance
- Labor and still-bottom disposal
Simple payback: installed project cost ÷ annual net savings. SRS reports that many customers achieve a 4–12 month return and that compatible streams can recover 97% or more. Treat those as possible supplier-reported outcomes, not guarantees. SRS solvent recycler overview
Solvent compatibility: a familiar solvent name is not a compatibility approval
Send the current SDS, dirty-stream composition, contamination, and intended reuse. Water, close-boiling mixtures, reactive materials, and heat-sensitive solvents can require separation, vacuum, special controls, or a different process.
| Solvent stream | Common candidate | Verify |
|---|---|---|
| Mineral spirits | Parts cleaning, paint, and maintenance | Boiling range, water, oil loading, desired purity |
| Lacquer thinner | Wood finishing, cabinet shops, coatings | Blend composition, close-boiling components, resin and pigment |
| Acetone | Cleaning, coatings, composites | Flash point, water, contamination, equipment rating |
| MEK | Coatings, adhesives, industrial cleaning | Complete SDS, blend stability, vapor controls, reuse purity |
| IPA and alcohols | Printing, cleaning, process use | Water, azeotropes, desired concentration, configuration |
| Naphtha / paint thinner | Cleaning and finishing | Exact formulation, boiling curve, additives, contamination |
| Flexo and litho wash | Printing | Ink and resin loading, water, mixed-solvent composition |
| Paint-booth line flush | Coatings operations | Mixed solvents, solids loading, required reclaimed quality |
Consumables and service: plan bags, heat-transfer oil, and service parts into operating cost
- Recycler bags. Approved high-temperature liners can capture sludge and simplify cleanout. Match size, thickness, temperature, and chemistry.
- Heat-transfer oil. Thermal oil carries heater energy to the vessel. Use the specified fluid, maintain level, and replace it by condition and guidance.
- Service items. Lid gaskets, seals, filters, sensors, condenser components, and cooling airflow affect cycle performance.
Safety and venting: specify the unit for the complete solvent stream and location
- Review every constituent and current SDS.
- Confirm hazardous-location certification and electrical requirements.
- Engineer room ventilation and vent or discharge routing for the actual solvent and local code.
- Provide grounding, bonding, spill control, compatible containers, and fire protection.
- Train operators on loading, limits, cooldown, residue removal, alarms, and shutdown.
- Review with the manufacturer, EHS team, insurer, officials, and authority having jurisdiction.
The SRS SR120 reference system is listed for Class I, Division I, Group D service and UL 2208. Do not assume every recycler or installation carries the same rating. SR120 specifications
Request for quote: send the SDS, dirty gallons, contamination, and current costs
- Current SDS for every solvent and blend
- Dirty gallons per day and week, plus peaks
- Source process and contamination
- Desired recovered quality and reuse
- Fresh-solvent price and annual purchases
- Waste drums, pickup frequency, and disposal cost
- Power, compressed air, floor space, and ventilation
- Hazardous-location and local EHS or fire requirements
- Loading, clean-solvent collection, and residue handling
Size the recycler from your waste stream
Send SRS your solvent SDS, dirty gallons per day, contamination, reuse requirement, and current purchase and disposal costs. We’ll help define capacity, safety options, and the inputs for a realistic payback model.
Request a Quote or call (847) 833-7010.
Buyer’s guide FAQ
What is a solvent recycler?
A solvent recycler is a distillation system that separates reusable solvent from paint solids, resins, oils, pigments, and other contamination in a spent-solvent stream.
How does a solvent distillation unit work?
The unit heats dirty solvent, condenses the resulting solvent vapor back into liquid, and leaves less-volatile contamination as still bottoms for proper disposal.
How do I size a solvent recycling system?
Measure dirty-solvent gallons per day and week, then compare that volume with usable batch capacity, cycle time, practical batches per shift, peak demand, and operator availability.
How do I calculate solvent recycler payback?
Add avoided fresh-solvent purchases and waste-handling costs, subtract utilities, consumables, labor, maintenance, and residue disposal, then divide installed cost by annual net savings.
Can mineral spirits be recycled?
Mineral spirits are a common candidate for distillation. Compatibility and recovered quality still depend on the exact formulation, water, oil, contamination, boiling range, and intended reuse.
Can a recycler process acetone, MEK, or lacquer thinner?
Many properly configured industrial recyclers process these solvent families, but the complete SDS, mixture, contamination, flash point, boiling range, and equipment rating must be reviewed before approval.
What do solvent recycler bags do?
Approved high-temperature bags capture still bottoms and can simplify residue removal. They must match the recycler, temperature, and solvent chemistry.
Does a solvent recycler eliminate hazardous waste?
No. It can reduce the volume of spent solvent sent off site, but still bottoms, filters, bags, and other residues must still be characterized and managed correctly.
