Molecular Sieve Membrane And Organic Solvent Dehydration
1. Technology principle
Molecular sieve membrane pervaporation (steam pervaporation) is a
new membrane separation technology with high efficiency, low energy
consumption and low investment. It is suitable for the separation
of constant boiling point, near boiling point mixtures and isomers,
purification and recovery of organic solvent and removal of trace
water. The molecular sieve membrane is a novel separation membrane
material with "molecular sieve" function by in-situ "hydrothermal
synthesis", which is used porous ceramic tubes such as alumina as
supporting bodies. The dense and uniform molecular sieve membrane
layer inherits the uniform pore size and hydrophilicity of the
molecular sieve which makes it have excellent selectivity for
dehydration and purification of various organic solvents that form
azeotropic with water in the fields of petrochemicals, biomedicine,
fine chemicals, new energy and environmental protection. The
technology has been widely recognized and applied for its energy
saving, environmental protection and easy operation. It is expected
to replace traditional separation technologies such as
distillation, extraction and adsorption in organic solvent
dehydration and purification applications. The separation principle
is as follows:
2. Technical advantages
1) Low energy consumption, 60-80% energy saving compared with
traditional methods, operating costs reduced by 60% and above,
recovery rate >99%
2) No third component is introduced or produced during the process,
and the product and environment are not contaminated
3) The equipment is compact and covers a small area.
4) Universally applicable, a system can be used for dehydration of
various organic solvents
New energy: production of fuel ethanol and fuel butanol
Purification and recycling of various organic solvents in the
pharmaceutical, chemical, printing, electronics, food and other
Alcohols: such as methanol, ethanol, propanol, isopropanol,
butanol, pentanol, etc.
Ketones: such as acetone, methyl ethyl ketone, methyl t-butyl
Esters: such as methyl acetate, ethyl acetate, butyl acetate, etc.
Ethers such as methyl tert-butyl ether, ethyl tert-butyl ether,
Aromatic compounds: benzene, toluene, etc.
Other systems: THF, DMF, DMSO, etc.
The reaction process such as esterification, etherification and
condensation removes the water formed by the reaction in situ,
increases the conversion rate of the process, and reduces the
energy consumption of solvent separation.