and Their Uses
is a membrane?
membrane is a device that selectively permits the separation of one or
more materials from a liquid or gas.
IMTLs membranes can be designed to use any of the passive membrane
of Inorganic Membranes
membranes are versatile. They can operate at elevated temperatures, with
metal membranes stable at temperatures ranging from 500-800º C and
with many ceramic membranes usable at over 1000º C. They are also
much more resistant to chemical attack. Because of the wide variety of
materials that may be used in the fabrication of our inorganic membranes,
resistance to corrosive liquids and gases, even at elevated temperatures,
can be realized. Inorganic membranes compete with organic membranes for
commercial use. In many of the harsh operational environments listed above,
organic membranes will not perform well, or will not survive at all. For
these environments, only inorganic membranes offer needed solutions.
of IMTL Porous Inorganic Membranes
their versatility, IMTL inorganic membranes can prove a benefit to
The oil and petrochemical industry
the cost of hydrogen separation and recovery associated with oil refining
and other processes.
petroleum production costs by capturing reusable by-products.
fuel energy producers
the cost and improving the efficiency of coal gasification.
and other by-products of fossil fuel combustion to help reduce greenhouse
iron oxides and other undesirable fossil fuel combustion by-products
found in stack emissions.
gas energy producers
natural gas reserves by removing excess carbon dioxide, nitrogen, and
moisture from natural gas wells.
pulp and paper manufacturing industry
fiber normally lost in the effluent.
valuable chemicals for reuse and reducing the amount of chemicals released
to the environment.
the uses above to convert a traditional paper factory to an almost self-contained
process by separating chemicals and wastes from process water and recycling
these valuable chemicals and now-clean water back into the processing
potable and process grade water for industry and municipalities from
surface and waste water, brackish water, sea water, brine water etc.,
using an inorganic reverse osmosis (RO) membrane with a very long lifetime.
Inorganic RO membranes are resistant to chlorine and other disinfectants
and can withstand steam treatments making them less vulnerable to bio-fouling.
applications, such as new advanced batteries and fuel cells
most applications where energy savings will be realized due to the efficiency
and performance of our membranes compared to other membranes or compared
to competing separation processes that do not use membranes.
Ability to Tailor Membrane and Filter Properties to the Broad Range of
Filtration Needs is Achieved by Layering Practices
membranes offer precise control of pore size with a high permeance and
a low pressure drop. This is accomplished by carefully selecting the number
of layers, the pore size of the layers, and the materials of construction
to produce a product that will accomplish the desired separation.
Pore Size: 4-50 angstroms
Thickness: single or multiple thin layers
Uses: RO, nanofiltration & molecular sieving
Pore Size: 0.005-0.5 µm
Thickness: 1-20 µm
Materials: oxides, carbides, nitrides, metals, metal alloys,
Uses: Ultrafiltration & microfiltration
Pore Size: 0.5-50 µm
Thickness: >400 µm
Materials: Metals, metal alloys, oxides, carbides, nitrides,
Uses: Depth filter & surface-cake filter
a separation requires the removal of 10 µm particles, the final
product may be a monolithic tube made from materials compatible with target
process conditions that you specify. This tube can be fabricated with
walls as thin as 400 µm (0.016 inches) for high permeance or up
to 0.1 inches thick if additional strength is required.
the separation requires much smaller pores, a layer or multiple layers
may be used in conjunction with the porous support tube. The advantage
of multiple layers is that the final separation layer can be made very
thin, which yields a membrane with maximum permeance. Other surface treatments
may be required for further reduction in pore size or for control of surface