Packed column distillation apparatus

Paired stage flash evaporator having improved configuration

Paired stage flash evaporator having improved distillate collect

Partially evacuated solar still

Partitioned distillation column

Partitioned distillation column

Pervaporation vessel

Photopolymer washout fluid solvent distillation apparatus and me

Pile furnace

Plant and method for vacuum distillation of hydrocarbon liquids

Plant for processing vegetal stock

Plant for retorting oil products contained in shales and sands

Plant for sea water desalinizing using solar energy

Plant for the vacuum distillation of a liquid product

Point of use water purification method and apparatus

Polar solvent dedusting

Polymerization inhibitor for vinyl aromatic compounds

Portable water distillation apparatus

Portable water distiller

Portable water purification apparatus