High-Gravity Distillation for DMSO Solvent Recovery: A Compact Continuous Distillation Case Study

High-Gravity Distillation for DMSO Solvent Recovery A Project Case StudyDimethyl sulfoxide (DMSO) is a high-boiling-point, heat-sensitive polar solvent widely used in pharmaceutical synthesis, fine chemicals, and advanced materials manufacturing.

Conventional tall-tower distillation processes suffer from common industry pain points: large footprint, high capital investment, long commissioning cycles, and the need for frequent packing replacement and maintenance.

Our company's proprietary high-gravity rotary distillation technology for solvent recovery and purification is environmentally friendly and provides integrated turnkey solutions for DMSO dehydration and other solvent recovery applications.

Feed Conditions for This Project：

Feed: 20–50% DMSO aqueous solution

Throughput: 50 kg/h

Operating mode: Continuous distillation, compatible with batch distillation

Negative-pressure operation;  DMSO material temperature ≤ 120 °C

Key Performance Indicators：

Recovered DMSO product purity ≥ 99%

Solvent recovery rate: 95%–99%

DMSO residue in distillate water < 0.5% (design value < 0.2%)

Water content in finished DMSO < 1% (design value < 0.5%)

Process Highlights

Compact footprint: The core unit (reboiler, high-gravity machine, condenser, and frame) requires only approximately 6 m² of installation area, replacing a conventional 16-meter-class distillation column.

Two-stage condensation design: The first-stage condenser recovers the vapor, while the second-stage low-temperature water condenser captures the tail gas, effectively reducing solvent volatilization losses.

Rapid startup: Stable operating conditions are reached within 10 minutes; low liquid holdup makes it ideally suited to the heat-sensitive nature of DMSO.

Packing-free structure: The high-gravity machine requires no packing, eliminating packing procurement and replacement costs and reducing downtime for maintenance.

Fully automated PLC/DCS control system, capable of stable operation under negative-pressure conditions of −95 to −90 kPaG.

Utility Consumption (Reflux Ratio = 0.5)

Heat duty: 42 kW; steam consumption: 67 kg/h

Total power consumption: approximately 7 kW (distillation main unit + transfer pumps + vacuum system)

Cooling water supplied for condensation and bearing circulation cooling

Wetted parts are standard-configured with 316L stainless steel; duplex steel or titanium materials are available for highly corrosive conditions.

Capable of recovering and purifying various waste solvents including DMSO, DMF, triethylamine, ethanol, and acetone. We welcome you to provide basic information such as your mother liquor composition, concentration, and throughput — our engineers will customize a process solution to help you solve solvent purification challenges, achieve green and environmentally friendly production, and effectively reduce operating costs. Please consult our professionals.