Method and apparatus for purifying water

Method and apparatus for purifying water

Splitter with multi-stage heat pump compressor and inter-reboiler

Process for the purification of lactams

By-products from fermentation still bottoms

Vessel for easily polymerizable compound

Method for concentrating solution

Method for separating volatile components by dilutive distillation

Fuel and by-products from fermentation still bottoms

Apparatus, method for enrichment of the heavy isotopes of oxygen and production method for heavy oxygen water