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Topic: Molecular sieve

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	Molecular Sieve Technology for Fuel Ethanol
		Super-heated rectified spirit from feed super-heater is passed to one of the pair of molecular sieve beds for several minutes.
		The vapor passes through a bed of molecular sieve beads and water in the incoming vapor stream is adsorbed on the molecular sieve material and anhydrous ethanol vapor exists from the Mol.
		Sieve units operate sequentially and are cycled so that one is under regeneration while the other is under operation, adsorbing water from the vapor stream.
	www.ethanolindia.net /molecular_sieves.html (898 words)

	Fabric softener composition containing molecular sieve zeolite - Patent 4610796
		Typically the percentage of the softener is 3 to 30% and that of the molecular sieve zeolite is 5 or 10 to 60%.
		The molecular sieves utilized in the invented compositions are water insoluble crystalline aluminosilicate zeolites of natural and synthetic origin which are characterized by having a network of similarly or substantially uniformly sized pores in the range of about 3 to 10 Angstroms, which size is uniquely determined by the unit structure of the zeolite crystal.
		The molecular sieve zeolite acts as a carrier for the softening composition and is a highly effective detergency builder; in other words it boosts the cleaning effect of detergent compositions in which it is incorporated or with which it is used.
	freepatentsonline.com /4610796.html (4283 words)

	SPI-Chem™ Molecular Sieve Adsorbants - SPI Supplies
		Molecular sieves are synthetically produced zeolites characterized by pores and crystalline cavities of extremely uniform dimensions.
		Molecular sieves, though, retain their ability to adsorb water molecules over a much wider spectrum of temperatures than any other desiccant material.
		Molecular sieves are very effective in reducing the water vapor content of gases in the parts per million range.
	www.2spi.com /catalog/spec_prep/molecular-sieve.html (398 words)

	Zeolite & Molecular Sieve Purification
		Molecular sieves are a class of adsorbents, which can trap molecules by adsorption into their pores.
		The term "molecular sieve" was originated by J.W. Mcbain to define porous solid materials, which have the property of acting as sieves on a molecular scale.
		The channels of zeolites are only a few molecular diameters in size, and overlapping potential fields form opposite walls result in a flat adsorption isotherm, which is characterized by a long horizontal section as the relative partial pressure approaches unity.
	www.jmgpt.com /html/zeolite___molecular_sieve_puri.html (1766 words)

	KODAK: Molecular Sieve Acid Scavenger
		Molecular Sieve is a promising new technology developed by Eastman Kodak Company, that has the ability to retard the vinegar syndrome reaction.
		Simply stated, the inclusion of Molecular Sieve with processed motion picture film in a sealed container has the ability to extend the life of the dye images and film support beyond that which is currently considered normal.
		Molecular Sieve is held in a semi-permeable packet of Tyvek™ - which allows vapors to be easily scavenged and contained.
	www.kodak.com /US/en/motion/support/technical/molecular.jhtml (574 words)

	Molecular Sieve Info (Site not responding. Last check: 2007-10-29)
		Molecular sieves are used to dehydrate the solvents used in the final stages of dehydration and embedding.
		Molecular sieves are typically zeolite compounds that strongly adsorb water and have carefully controlled pore sizes.
		Running the solvent slowly through a column of the molecular sieves would be the most effective way to remove water but, ordinarily, dried sieves are just placed into the bulk solvent container (about 5%-10% by volume) to remove most water.
	www.bio.umass.edu /microscopy/mol_sieves.htm (422 words)

	Molecular Sieve Traps
		The molecular sieve trap is a foreline trap which employs synthetic zeolites (molecular sieve (13X) as an absorbent.
		The mol sieve is porous and traps the oil in a gas phase.
		The molecular sieve is loaded into the trap through a 3/4" ID vacuum type fill port and is held in position by a retaining screen.
	www.hyvac.com /Products/Filt_Traps/Particulate/MAT_pictures.htm (759 words)

	desiccant, desiccants, silica gel, mol sieve, molecular sieve
		Molecular sieve is non-toxic, insoluble to water and most organic solvent, and is used as selective absorbent (organic and inorganic), premium catalytic promoter, and premium ion exchanger.
		Molecular sieve has a very porous structure consisting of cavities and channels of uniform size (3, 4, 5, or 10 Angstroms).
		Molecular sieves are often used in cation exchange application.
	www.biof.com /desiccants_molsieve.html (401 words)

	Molecular sieve - Wikipedia, the free encyclopedia
		A molecular sieve is a material containing tiny pores of a precise and uniform size that is used as an adsorbent for gases and liquids.
		Molecular sieves are usually utilized in the petroleum industry, especially with purification of gas streams.
		Methods for Regeneration of molecular sieves include by pressure change as in oxygen concentrators or by heating and purging with a carrier gas as when used in ethanol dehydration.
	en.wikipedia.org /wiki/Molecular_Sieve (235 words)

	Molecular Sieve desiccant -- AceChemPack supply: molecular sieve, desiccant,3A,4A,5A,13X for petrochemical,glass ...
		Molecular sieves are crystalline metal alumina silicates having a three dimensional interconnecting network of silica and alumina tetrahedra.
		After regeneration, a cooling period is necessary to reduce the molecular sieve temperature to within 15° of the temperature of the stream to be processed.
		Alternatively, small quantities of molecular sieves may be dried in the absence of a purge gas by oven heating followed by slow cooling in a closed system, such as a desiccator.
	www.tower-packing.com /Dir_molecular_sieve.htm (744 words)

	Molecular Battery,Molecular Sieve Battery
		Molecular sieve battery is a battery of two vessels filled with a molecular sieve to absorb Carbon Dioxide and Moisture from process air.
		Molecular sieve has regenerating electric heater, temperature sensors and control panel with temperature controller.
		Each vessel of Molecular Battery is filled with molecular sieve of 1.5/3 mm type 13-X. This is regenerative type capacity 400m3/hr to 2000 m3/hr and 12 hour regeneration cycle.
	www.gas-plants.com /molecular-sieve-battery.html (107 words)

	KODAK: Molecular Sieve Acid Scavenger
		Molecular Sieve can be introduced at any stage of film storage, but is most effective when introduced at the earliest opportunity (after lab processing and before storage).
		Molecular Sieves are supplied in strips of 6 packets.
		Molecular Sieve packets should be replaced every two years if stored at ambient temperatures and every 10 to 15 years if stored at NAPM recommended conditions of 2°C at 20-30% relative humidity.
	kodak.com /US/en/motion/support/technical/molecular.jhtml?...&lc=en (574 words)

	Fluid Energy - VanAir Desiccant...silica gel dessicant, desiccant silica gel, silica gel, desiccant, silica gel ...
		A common molecular sieve application is working as a polishing layer to achieve dew points down to -120°F, and in applications for drying hydrocarbons and other exotic gases.
		Molecular Sieve is a combination of optimized desiccant materials including: sodium potassium and calcium alumina silicate.
		Molecular sieve is non-toxic and insoluble to water and most organic solvents.
	www.fluidenergy.com /desiccant.html (749 words)

	Molecular Sieve 4A
		Molecular Sieve type 4A is an alkali alumino silicate; it is the sodium form of the Type A crystal structure.
		Zeochem type 4A molecular sieve will adsorb most molecules with a kinetic diameter of less than 4 angstroms and exclude those larger.
		Molecular Sieve type 4A can be regenerated by evacuating or purging, usually at elevated temperatures.
	www.zeochem.ch /articles/25 (192 words)

	General Chemistry Online: Glossary:
		A molecular equation is a balanced chemical equation in which ionic compounds are written as neutral formulas rather than as ions.
		Molecular orbitals are usually spread across many atoms in the molecule, and they are often described as a combination of atomic orbitals on those atoms.
		Momentum is a property that measures the tendency of a moving object to keep moving in the same direction.
	antoine.frostburg.edu /chem/senese/101/glossary/m.shtml (1485 words)

	Molecular sieve oxygen concentrator with secondary oxygen purifier (US4880443) (Site not responding. Last check: 2007-10-29)
		Molecular sieve oxygen concentrators have attracted considerable attention recently because they are capable of producing high purity oxygen (about 95%) in a simple, cost-effective manner.
		This invention involves a device comprised of four interdependent adsorption beds, two of which contain zeolite molecular sieves and the other two contain carbon molecular sieves, six air operated valves, a solenoid activated valve, a manual valve and a programmable solenoid actuator.
		Each of the zeolite beds is connected in series with a carbon molecular sieve bed, so that the gas flow must pass sequentially from a zeolite molecular sieve bed to a carbon molecular sieve bed.
	www.delphion.com /details?pn=US04880443__ (1492 words)

	Molecular Sieves / Molecular Sieve Desiccant \| \|Activated Alumina \| Silica Gel \| Molecular Sieve \| Sorbead Silica Gel \| ...
		Molecular Sieve Desiccant is available in several bead sizes and types in fixed or bulk quantities.
		Molecular sieve adsorbents were developed to remove water from liquids and gases more efficiently than the older silica gel and alumina desiccants.
		Molecular sieve systems are extremely simple to use for reducing contaminants to nearly undetectable levels compared to other technologies such as liquid separation systems.
	www.deltaadsorbents.com /molecular_sieve.asp (238 words)

	GeeJay Chemical - UK Desiccant Molecular Sieve Supplier
		Molecular sieves are desiccants with differing properties to those of silica gel.
		With the appearance of small opaque pinkish beads, molecular sieves are synthetically produced, highly porous crystalline metal-alumino silicates.
		This makes molecular sieves ideal for adsorption of water from air and liquids, as water molecules are both polar and very small.
	www.geejaychemicals.co.uk /molecularsieve.htm (801 words)

	Nor-Cal Products, Inc. - 05.0 Molecular Sieve Traps
		When initializing a new trap, replacing the sieve or when base pressure cannot be achieved, the sieve should be regenerated by turning on the heater for a few hours and running the mechanical pump with it’s ballast valve open.
		The frequency and duration of sieve regeneration is dependent upon the kind and amount of gasses produced by the particular application.
		All molecular sieve traps are supplied with a molecular sieve charge and a regeneration heater.
	www.n-c.com /Page.asp?NavID=44 (338 words)

	Molecular Battery,Molecular Sieve Driers
		And that the Molecular Sieve is thoroughly cooled after regeneration, before the process air is passed through it again.
		Oil vapor will destroy the Molecular Sieve and therefore ensure that the carbon filter is in good condition and the process air is as cool as possible, that maximum oil and moistures condenses out before the air enters the vessel.
		If the main valves are opened rapidly, the Molecular Sieve may break up, due to high pressure air propelling the Molecular sieve in the vessel.
	www.oxygengasplant.net /molecular-sieve-driers.htm (489 words)

	Zeolite Molecular Sieve
		Zeolite molecular sieves are crystalline, highly porous materials, which belong to the class of aluminosilicates.
		The GRACE Davison molecular sieve can retain its high capacity at high temperature, which makes it the optimal material if drying needs to be carried out at comparatively high temperatures.
		The unique properties of zeolitic molecular sieves have led to the development of a broad range of GRACE Davison zeolite adsorbent products such as zeolite beads, powders, polymer desiccants, mono/miniliths, drying bars and castor oil paste.
	www.gracedavison.com /eusilica/Adsorbents/product/zeolite_molecular_sieve.htm (582 words)

	4A Molecular Sieve (Site not responding. Last check: 2007-10-29)
		A common 4A molecular sieve application is dehydrating compressed air.
		In a desiccant air dryer molecular sieve is regenerated by heating and purging.
		Molecular sieve is often used as a polishing layer in air dryers to reach dewpoints of -120° F. Molecular Sieve MSDS
	www.ecompressedair.com /desiccant/molecularsieve.shtml (380 words)

	Carbon molecular sieve for the kinetic separation of acid gases and fluorocarbons - Patent 5261948
		Commercial applications of carbon molecular sieves are typified by the recovery of pure nitrogen from air in a pressure swing adsorption process.
		Carbon molecular sieves are materials that as a class have zeolite-like shape selective properties, but which are not reacted in a consumptive manner with HF and other acid gases.
		Carbon molecular sieve was prepared from 60 g of polyfurfuryl alcohol (Durez resin) with a room temperature viscosity and specific gravity of 200 cp and 1.21 g/cc each.
	www.freepatentsonline.com /5261948.html (3245 words)

	Aluminophosphate molecular sieve, its synthesis and use patent invention
		According to this classification, framework-type zeolite and zeolite-type molecular sieves, for which a structure has been established, are assigned a three letter code and are described in the Atlas of Zeolite Framework Types, 5th edition, Elsevier, London, England (2001), which is herein fully incorporated by reference.
		[0005] Molecular sieves are typically described in terms of the size of the ring that defines a pore, where the size is based on the number of T atoms in the ring.
		Medium pore molecular sieves typically have pores defined by a ring of 10 T atoms and have an average pore size about 0.5 to 0.6 nm (5 to 6.ANG.), whereas large pore materials have pores defined by rings of 12 or more T atoms and a pore size greater than 0.6 nm (6.ANG.).
	www.freshpatents.com /Aluminophosphate-molecular-sieve-its-synthesis-and-use-dt20060406ptan20060074267.php (1366 words)

	MIT's molecular sieve advances protein research - MIT News Office
		The molecular sieve developed by MIT engineers is more precise than conventional methods and has the potential to be much faster.
		The key to the molecular sieve, which is made using microfabrication technology, is the uniform size of the nanopores through which proteins are separated from biological fluids.
		The sieving process is based on a theoretical model known as the Ogston sieving mechanism.
	web.mit.edu /newsoffice/2006/sieve.html (731 words)

	Straight Inline Molecular Sieve Traps (Site not responding. Last check: 2007-10-29)
		Molecular sieve traps use a zeolite desiccant to remove hydrocarbons which backstream toward the chamber when the mechanical pump oil reaches its vapor pressure; and they trap water vapor and other gases before those gases reach the mechanical pump and contaminate the pump oil.
		When unable to achieve base pressure, the operator should regenerate the sieve by turning on the heater for a few hours and running the mechanical pump with its ballast valve open.
		The frequency and duration of sieve regeneration depends on the kind and amount of gas(es) produced by the particular application.
	www.lesker.com /newweb/Traps_and_Filters/Foreline_Traps/MolecularSieveTraps/StraightInline_QF_ISOFlange.cfm?CFID=561951&CFTOKEN=20469167§ion=strinline&init=skip (315 words)

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