Pervaporation is an energy-efficient combination of membrane permeability and evaporation. It is considered an attractive alternative to other separation methods for various processes. dehydration of solvents and removal of organic matter from aqueous streams.
In addition, as a good choice for the separation temperature has emerged pervaporation.Precision products. Pervaporation can be used for dehydration of azeotropes, solvents and other volatile organics, organic / organic separation such as ethanol or methanol removal, and waste water treatment crushing.
Pervaporation and Vapor permeability involves the separation of two or more components through a membrane with different diffusion rates from the evaporation phase change comparable to a thin layer and a simple flash step. A vacuum applied to the permeable side is combined by the immediate condensation of the penetrating vapors. Pervaporation is typically suitable for separating a small component of a liquid mixture, so high selectivity from the membrane is important.
High-performance Zeolite or Hybsi® membranes (a special technology of ECN) have been successfully developed and applied for industrial purposes many years ago. This energy efficiency technology is used in pharmaceutical, semiconductor, petroleum chemistry, etc. in China. It is widely accepted in many industries. PV & VP technology has been taken from many projects where it has many advantages over conventional dehydration processes such as evaporation, distillation and the adoption of zeolite.
PV / VP process features:
* Low energy consumption, less operating cost
* Does not require any immersive, does not contaminate the product
* Easy operation and less maintenance
* Functions independent of steam / liquid balance
* Reliable treated solvent quality
* Less labor cost
* Less waste discharge
Solvent Dehydration with PV & VP Technology:
Methanol Acetone Ethyl tert-butyl ether (ETBE)
Ethanol Butanone Di-isopropyl ether (DIPE)
Propanol and IPA
Tetrahydro furan (THF)
Butanol and IBA Triethylamine Dioxane
Pentanol Pyridine Methyl acetate
Cyclohexanol Aniline Ethyl acetate
Benzene dichloro methane acetic acid
Methyl tert-butyl ether (MTBE)