Bulk desiccants
Absorbents size comparison
chart - click here to display.
Silica Gel
Silica gel is a vitreous, highly porous form of silica, a naturally
occurring mineral that is purified into either granular or beaded
form. It is a desiccant commonly encountered in everyday life.
Silica Gel Indicating Blue
Contains a cobalt based indicator, the indicator causes the
gel to change colour from blue when dry, to pink when hydrated.
Material Safety Datasheet
- click here to display.
Silica Gel Indicating Orange (EnviroGel)
Contains an advanced indicator, the indicator causes the gel
to change colour from orange when dry, to green when hydrated.
This indicator was developed as an alternative to the cobalt-based
indicating blue.
Material Safety Datasheet
- click here to display.
Silica Gel Non Indicating
100% pure silica gel used when no visual indication of hydration
is required.
Molecular Sieve
ECP Ltd are agents for UOP Ltd, a division of Honeywell
Corporation based in the USA.
What Are Zeolite Molecular Sieves?
Zeolite molecular sieves are crystalline structures that, on
a molecular scale, are not unlike sponges. They have a solid framework,
defined by large internal cavities where molecules can be adsorbed.
These cavities are interconnected by pore openings through which
molecules can pass, and because of their crystalline nature, the
pores and cavities are all precisely the same size. Depending
on the size of the openings, they can adsorb molecules readily,
slowly, or not at all, thus functioning as molecular sieves -
adsorbing molecules of certain sizes while rejecting larger ones.
The ability of these molecular sieves to attract and sort molecules
is also affected by the electrical charge or polarity of the molecules
being sorted. Synthetic zeolites possess the unique ability to
selectively adsorb molecules by size and polarity. This is the
key to their unusual efficiency as agents for drying and purifying
liquids and gases. Such abilities also serve as the basis for
separation.
Synthetic zeolites can be manufactured to provide a wide range
of desired adsorption characteristics or selectivities, and can
be used as a separation tool for numerous commercial applications.
Traditional molecular sieves work as desiccants, adsorbents,
and ion exchangers. UOP also offers high-silica zeolites for non-traditional
applications, including the removal of organic molecules that
can cause odours or affect taste within food and beverage packaging.
Molecular sieves have selective adsorption, that is to say it
will absorb molecules whose diameter is less than the pore size
of molecular sieve. As for polar molecules and unsaturated molecules,
molecular sieves have selective adsorption. The bigger the polarity,
the higher the unsaturated ratio and the stronger selective adsorption.
Molecular sieves have high water absorption even at high temperatures,
or low content of water.
ECP stock Molecular sieve are divided into several types dependant
on pore size and application.
3A Molecular Sieve
Typical applications include:
- Dehydration of many kinds of liquids (such as ethanol)
- Dehydration of air
- Dehydration of refrigerant
- Dehydration of natural gas or methane
- Dehydration of cracked gas, ethylene, propylene or butadiene
13X Molecular Sieve
The pore size for 13X molecular sieve is about 10A so it can adsorb
any molecule smaller than 10A. Mainly used as a catalyst carrier,
co-adsorption of CO2 + H2O and H2O + H2S, as a desiccant for medical
and air compressor systems, and can also be adjusted to fit other
applications.
Typical applications:
- Drying of air
- Purification and removal of H2O and CO2
- Dehydration and desulfuration of nature gas, liquid petro
gas and liquid alkane
13X APG Molecular Seive
Type 13X APG molecular sieve is specially designed to co-absorb
CO2 and H2O for the air cryo-separation industry. It has larger
capacity and faster adsorption speed for the removal of CO2 and
H2O. It is suitable for air cryo-separation plants of any size
and type.
Product profile - click here to
display a printable data sheet.
PSA O2 HP MOLSIV™
Introduction
PSA O2 HP adsorbent was specifically developed for on-site generation
of oxygen in PSA systems, the nitrogen selectivity of this product
makes it particularly applicable for this function.
PSA O2 HP molecular sieve can also be used to retrofit PSA O2
units containing older generation adsorbents to increase productivity
or to reduce power consumption.
Product profile - click here to
display a printable data sheet.
Insulating Glass Desiccant
for Double Glazing
Insulating glass desiccant deeply co-adsorbs the resident moisture
and organics in Insulating Glass and keeps the IG clear and transparent
even at very low temperatures. More importantly, it can successfully
prevent the distortions from air pressure changes placed on the
glass through the changing of the day-night temperatures. It carries
this out through desorption and adsorption to maintain a constant
air pressure and humidity. This resolves the problem of windows
distortion caused by IG expansion and shrinkage, preserving the
life span of IG windows.
Activated Aluminas
Aluminas are a family of aluminum oxides (Al2O3) that can take
many forms. As a general term, "alumina" refers to the
lower temperature transition alumina forms. UOP manufactures and
markets two unique aluminas for use as adsorbents and catalysts,
as well as numerous other applications. The most common use for
aluminas is in the manufacturing of aluminium.
Activated aluminas are both high surface area beads and crushed
products that are "activated" by a proprietary process
to achieve specific surface chemistry and reactivity. Commonly
used as adsorbents, desiccants and catalysts, the chemistry, size
and structure of these aluminas are tailored to specific applications
at UOP's ISO 9001:2000 certified plant in Baton Rouge, Louisiana.
Additives are also commonly used with activated aluminas to achieve
even greater performance in certain applications eg removal of
sulphur and chloride in refinery applications.
Through our ongoing alumina development, UOP has expanded this
array to include pseudoboehmite, gamma and bayerite aluminas,
all with varying densities and dispersibility ranges. In addition
to being a key component in many commonly used catalysts, UOP's
Versal aluminas are also used as adsorbents.
Product profile - click here to display
a printable data sheet.
Absorbents size comparison chart
- click here to display.
 Carbon
Molecular Sieve
Carbon molecular sieve (CMS) are cylindrical black particles containing
countless 4 angstrom fine pores, commonly used to separate air
into nitrogen and oxygen in PSA systems. Our CMS products have
a large nitrogen yield capacity resulting in a high nitrogen recovery,
the products are able meet the requirements of all types of PSA
nitrogen systems.
Product profile - click here to display a
printable data sheet.
Catalyst Supports - Inert Alumina
Ceramic Balls?
With stable chemical properties and a low rate of water absorption,
within a manufacturing process Inert alumina ceramic balls can
withstand:
- high temperatures and high pressure,
- corrosion of acid, alkali and some other organic solvents,
- and thermal shock (quick change of temperature).
The main role of these ceramic balls is to support the heterogeneous
catalyst particles away from the unit outlet, or support grid
perforations. They can also help to improve the gas or liquid
distribution through the catalyst bed.
Applications:
Catalyst Supports are used routinely in the following specific
services: ammonia plants, dydrotreaters, bender treaters, isomerization
units, chloride absorbers, pretreaters and reactors, Claus units,
molecular sieve units, diesel hydrotreaters, naphtha treaters,
fixed bed reformers, reformer pretreaters, fluidized pollution
control, hydrocrackers (1st stage), VGO pretreaters and hydrogen
plants.
Product profile - click here to display
a printable data sheet.
Ethylene Scrubbing Media
 Our
competitively priced ethylene scrubbing media consists of potassium
permanganate (KMnO4) impregnated on activated alumina. With a
minimum KMnO4 content of 6 wt%, our media is ideal for removing
ethylene gas from containers, storage areas or coolstores. It
works by oxidising the ethylene gas - the purple permanganate
turns into brown manganese dioxide, a safe non-toxic material
that can be used as fertiliser.
Our ethylene scrubbing media is suitable for use with fruits
and vegetables, flowers and other industrial applications, including:
removal of H2S, SO2, organic acids, nitrogen oxides and other
gaseous chemical contaminants.
We can supply bulk media in any quantity, we are also able to
provide filters and other scrubbing systems - please contact Paul
on 09 480 4532 or paul@ecpltd.co.nz
for further information and pricing.
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