Vacuum Reactor Systems

Many chemical reactions — polymerisation, esterification, polycondensation — are conducted under vacuum to shift equilibrium towards the desired product, remove volatile by-products (water, alcohol) as they form, and lower the boiling point of the reaction mixture for better temperature control. Steam ejector systems maintain the required vacuum continuously throughout the reaction cycle. Unlike mechanical vacuum pumps, ejectors do not have seals, lubricants or rotating parts that can be attacked by the corrosive vapours and monomers present in reactor offgas.

A key advantage of steam ejectors in polymerisation service is their ability to handle condensable vapours (monomer vapours, solvents) without damage — vapours that would condense and damage a mechanical vacuum pump. Tamil Nadu Petroproducts Limited, a major PVC manufacturer and repeat customer, relies on Primetech ejectors for their reactor vacuum systems.

Solvent Recovery & Distillation

Recovery and purification of solvents such as MEK, acetone, toluene, DMF and DMSO from process streams uses vacuum distillation to separate azeotropes and reduce distillation temperatures, preventing degradation of heat-sensitive solvents. Two and three-stage ejector systems provide the moderate vacuum (50–200 Torr) typically required for solvent recovery columns, handling the mixed solvent vapour/NCG overhead load efficiently.