UNKA ENGINEERINGEPC CONTRACTORUNKA ENGINEERING designs solvent recovery and recycling plants around the actual spent-solvent composition and reuse specification. The process can combine feed segregation, pretreatment, distillation, vacuum operation, dehydration and final polishing, with equipment and controls matched to the selected solvent mixture.
Collection, pre-treatment, batch/continuous distillation, rectification, drying and recycle. The operating sequence, recycle paths, start-up/shutdown cases and normal/turndown behavior are defined before equipment finalization.
Distillation columns, reboilers, condensers, decanters, vacuum system, tanks and pumps. Materials, design margins, maintainability, isolation, access, lifting and spare philosophy are coordinated with the approved operating cases.
Approved feed analysis, capacity, product targets, operating envelope, site data, utilities, logistics constraints and client battery limits.
VLE review, recovery balance, duty calculations, materials selection, PFD/P&ID and control philosophy. The package also includes line/equipment lists, relief and utility summaries, layouts or 3D interfaces, vendor-document requirements, inspection plans and commissioning inputs as applicable.
Process safeguarding, alarms/interlocks, relief and flare interfaces, fire and gas requirements, hazardous-area design, HAZOP/SIL actions and emergency shutdown philosophy.
Paint, chemical, pharmaceutical, extraction and general process industries. Capacity, product quality, consumption and emissions commitments are confirmed only after the representative feed and project Design Basis are approved.
ASME, TEMA, IEC, NFPA and hazardous-area requirements. The contractual code basis is selected by destination and client specification. ASME/API/TEMA, EN/DIN and GOST/EAC requirements are not mixed without an approved code-equivalency and authority review.
ASME, TEMA, IEC, NFPA and hazardous-area requirements.
Each process section is engineered from the approved feed characterization, required product specification, site utilities and contractual battery limits. Select a unit for its process principle, equipment, controls, deliverables and applicable standards.
Spent-Solvent Collection & SegregationCompatible solvent streams are received, sampled and segregated to prevent cross-contamination and unsafe mixing.OPEN UNIT PAGE →
Solvent Feed Pre-TreatmentSettling, filtration, phase separation and optional neutralization remove solids, water and reactive contamination before distillation.OPEN UNIT PAGE →
Solvent Distillation & RectificationAtmospheric fractionation separates the reusable solvent from light ends, water-rich cuts and high-boiling impurities.OPEN UNIT PAGE →
Vacuum Solvent RecoveryVacuum operation lowers boiling temperature for heat-sensitive or high-boiling solvents and reduces degradation and fouling.OPEN UNIT PAGE →
Recovered-Solvent DehydrationDecanting, azeotropic drying, adsorption or molecular sieves achieve the project-specific water limit.OPEN UNIT PAGE →
Solvent Final Polishing & ReleaseCarbon, clay, fine filtration and laboratory release checks establish colour, purity, water and residue-on-evaporation compliance.OPEN UNIT PAGE →