16 · Case Studies
01
Methanol Recovery
27 emission points · 200–700 Nm³/hr · 90% recovery
Attached to a batch organic synthesis plant. Recovered product runs 90–92% methanol purity and is recycled without distillation, at an operating cost of a few rupees per kilogram.
Centralised multi-vent systems →02
Acrylonitrile Recovery
>99% recovery · 950–1,100 t/yr recovered
A process plant consuming and recycling hundreds of tonnes per day. The system achieved over 99% recovery across multiple equipment emission points.
03
Hexane Recovery
100 Nm³/hr · outdoor installation
Acidic hexane emissions from a phase-transfer reactor. Installed as an outdoor unit mounted on the first floor — compact footprint on a working plant.
04
Carbon Disulphide (CS₂)
20,000–45,000 Nm³/hr · 90% recovery · 500× scale-up
Proven first on a pilot plant, then scaled up 500× to commercial capacity. CS₂ at 5–15 g/Nm³ alongside 2–5 g/Nm³ H₂S; CS₂ and H₂S recovered separately.
05
Methylene Dichloride (MDC)
950 kg/hr · 99% recovery · skid-mounted
Plant skid-assembled and shipped to site for installation outside the process plant. Achieved 99% recovery of the full stream.
06
Gravure Printing
100,000+ Nm³/hr · mixed solvent blend
High-speed operation with a shifting mix: ethyl acetate, ethanol, n-propyl acetate, MEK, toluene, isopropanol. Recovered mixed solvent dehydrated and re-blended to original formulation.
Flexible packaging & printing →07
Flexible Packaging
Laminating machines · single and mixed solvents
Laminating-machine-scale installations recovering single or mixed solvents from high-speed packaging lines. Detailed economics are on the rotary concentrator page.
Flexible packaging & printing →08
Paint Shops
Automotive · household · appliance paint lines
Rotary concentrator paired with Genosorb absorption. Recovered solvents reused in paint formulation, as diluent, or as cleaners — an alternative to the incineration route common in Europe.
Low-concentration streams →09
COD Reduction
7 solvents · COD reduced from 200,000 to <1,000
Effluent water carrying high chemical-oxygen-demand loads was treated by stripping the solvent with air, then recovering it through a rotary concentrator and Genosorb plant.
Effluent COD reduction →