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

Pivoting back one-spot coke car

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

Plastic covered solar still

Plug for protecting coke-oven chamber doors from the action of t

Plug seal discharge system for distillation apparatus

Plug-type coke oven door

Point of use water purification method and apparatus