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Topic: Adsorbent

	Adsorbent processing to reduce basestock foaming - Patent 4600502
		The adsorbent may be regenerated and/or replaced at pre-determined intervals or when the foaming of the hydrocarbon exiting from the adsorption zone exceeds a predetermined value.
		As used herein the term "adsorbent" is defined to include solids in the beds which adsorb the foam producing compounds onto their surfaces and/or solids in the beds which absorb the foam producing compounds.
		While both neutral and basic adsorbents were effective in reducing the foaming tendency of lubricating oil basestocks, the neutral adsorbents also removed basic nitrogen compounds, which are not believed to contribute to the foaming tendency of the lubricating oil.
	www.freepatentsonline.com /4600502.html (3399 words)

	Projects \| Review - Issue 13
		During the adsorbent synthesis step, adsorbent is synthesized from precursor material in the form of a cloth-like material (nonwoven) made by moderate binding-together of fibers (mainly polyethylene).
		This performance of the adsorbent is based upon data obtained using adsorbent prepared from material with a 40 m fiber diameter of the nonwoven.
		Adsorbent is used in the form of 15 cm wide strips of nonwoven sandwiching a spacer and coiled into a short cylindrical shape.
	npc.sarov.ru /english/digest/132004/appendix8.html (2250 words)

	adsorbent (Site not responding. Last check: 2007-11-05)
		An adsorbent is a substance, usually porous in nature and with a high surface area that can adsorb substances onto its surface by intermolecular forces.
		Adsorbents are also used for extraction purposes removing traces of organic materials from large volumes of water very efficiently (cf solid phase extraction devices).
		Adsorbents used in liquid solid chromatography are mostly silica gel and various types of bonded phases.
	www.chromatography-online.org /topics/adsorbent.html (1026 words)

	Pore size, shape (Site not responding. Last check: 2007-11-05)
		One of the most important adsorbent parameters is the pore size and pore size distribution.
		As we discussed in the theory chapter, adsorbent surface area is the factor directly affecting the analyte retention.
		Decision, which model is appropriate for particular adsorbent usually based on the cross-calculations of pore volume and surface area and comparison with the experimentally measured values.
	hplc.chem.shu.edu /NEW/HPLC_Book/Adsorbents/ads_pore.html (354 words)

	Ap Note 32 - Selection and Use Of Adsorbent Resins for Thermal D
		Adsorbent resins such as Tenax TA, Tenax GR and a wide variety of activated charcoals are widely used to trap volatile and semi-volatile organics from gas or liquid samples when utilizing purge and trap techniques for the trapping and subsequent analysis of volatiles from gas, liquid or solid matrix samples.
		A GC equipped with a FID detector was used to analyze adsorbent traps packed with seven different adsorbent resins (Figure # 1) to determine the breakthrough volumes for a large number of hydrocarbons and alcohols as a function of desorption temperature.
		The breakthrough volume is defined as the calculated volume of carrier gas per gram of adsorbent resin which causes the analyte molecules to migrate from the front of the adsorbent bed to the back of the adsorbent bed.
	www.sisweb.com /referenc/applnote/app-32-a.htm (1600 words)

	Self-retaining adsorbent bag unit (Site not responding. Last check: 2007-11-05)
		The adsorbent container should be fixedly positioned within the receiver so that it cannot move about, thereby obviating the possibility of obstructing refrigerant flow or becoming worn and bursting due to abrasive action.
		The present invention relates to an adsorbent unit comprising a container, adsorbent in said container, elongated flexible securing means having first and second spaced portions, first means attaching said first portion to said container, and second means on said second portion for attaching said securing means to an object.
		Adsorbent 25 may be of any desirable composition and may selectively include, without limitation, adsorbents such as silica gel, metal alumino silicate, alumina, calcium sulphate, activated charcoal, molecular sieve, or any other desired compound in bead, pellet or granular form.
	www.sacnewsmonthly.com /invent/washing_machine/self-retaining_adsorbent_bag_unit.html (1760 words)

	Assessment of SDS3 Gas Adsorbent Increases Use and Safety - Semiconductor International (Site not responding. Last check: 2007-11-05)
		The total volume of adsorbent in each cylinder — and therefore of stored gas —; was determined by the quantity of beads in the cylinder.
		The SDS3 welded cylinder allows the use of adsorbent blocks of microporous carbon, similar in appearance to hockey pucks, to be stacked inside prior to the welded cap’s installation.
		The primary concern for both the gas cylinder and adsorbent material was with the presence of impurities in the gas.
	www.reed-electronics.com /semiconductor/article/CA6367920.html (1602 words)

	MERSORB® Mercury Removal Adsorbent (Site not responding. Last check: 2007-11-05)
		The NUCON family of mercury removal adsorbents are available to remove mercury from gases, water and wastewater and liquid hydrocarbons.
		LW adsorbent for mercury removal from water and wastewater is available as a 1.5 mm coal based pellet.
		LH adsorbent for removal from liquid hydrocarbons is available as a 1.5 mm coal based pellet.
	www.nucon-int.com /carbon/industrial/mersorb.shtml (225 words)

	Performance of Pollutant Adsorbents (Conservation at the Getty)
		Selecting the proper adsorbent should be based on matching the adsorbent's capacity with measured or theorized gas species known to be - or strongly suspected to be - present in a given microenvironment.
		The breakthrough is the point at which a downstream contaminant concentration is measurable at the outlet of the adsorbent and begins to rise rapidly.
		One of the advantages of using TG/DTA/MS to evaluate adsorbent performance is the ability to gain a sense of the heats of adsorption and relative contribution to overall adsorption contributed by chemisorption versus physisorption processes?and, by changing the carrier gas used in the analysis, to perform active chemical experiments with pollutants, in situ.
	getty.edu /conservation/science/adsorbents/adsorbents_component2.html (646 words)

	Adsorption - Wikipedia, the free encyclopedia
		Surface area of adsorbents depends on their structure, the more pores they have, the greater the area, which has a big influence on reactions on surfaces.
		The adsorbents are used usually in the form of spherical pellets, rods, moldings or monoliths with hydrodynamic diameter between 0.5 and 10 mm.
		The adsorbent acts as a ‘chemical compressor” driven by heat and is, from this point of view, the "pump" of the system.
	en.wikipedia.org /wiki/Adsorbent (2718 words)

	Barium-and calcium-based zeolitic adsorbent for gas purification in particular air - Patent 7011695
		The adsorbent of claim 15, wherein said adsorbent comprises exchangeable cations in the amount of from about 10 to 90% calcium cations, from about 10 to 90% with barium cations, and wherein the sum of said barium and said calcium cations represent at least about 20% of the total exchangeable cations available in said adsorbent.
		The adsorbent of claim 20, further comprising about 15 to 65% said calcium, about 25 to 80% said barium, and said residual sodium and/or potassium cations, wherein the sum of said barium, calcium, sodium, and potassium cations present represents at least about 80% of the cations present in said adsorbent.
		The adsorbent of claim 21, wherein the sum of said barium, calcium, sodium, and potassium cations present represents from about 90% to 100% of the cations present in the adsorbent.
	www.freepatentsonline.com /7011695.html (4580 words)

	Surface area (Site not responding. Last check: 2007-11-05)
		An exact knowledge of the adsorbent surface area is very important, since retention is proportional to the surface area of the adsorbent.
		At the low temperature most of the adsorbent does not show any specific interactions, and adsorption of the nitrogen molecules can be approximated by the monolayer model.
		Chemical modification of the adsorbent surface should also have an influence on the surface area and also on the pore volume of the adsorbent.
	hplc.chem.shu.edu /NEW/HPLC_Book/Adsorbents/ads_area.html (243 words)

	Removal of Mercury from Flue Gases Using a Chelating Adsorbent (Site not responding. Last check: 2007-11-05)
		The potential of novel, nano-structured chelating adsorbents for the removal of mercury from flue gases emitted from coal-fired power plants is reported.
		This ongoing research uses a new adsorbent architecture to implement chelation for the capture of mercury directly from the gas phase.
		It will be shown that the adsorbents rapidly capture oxidized mercury, have a very high operating capacity at typical flue gas conditions, and can be synthesized to be stable for operation in flue gas exiting the electrostatic precipitators.
	www.ohioairquality.org /symposium/ab_08.asp (236 words)

	Friedel-Crafts Acylation (Site not responding. Last check: 2007-11-05)
		The same adsorbents are used, silica gel and alumina (basic, neutral, and acid washed).
		The adsorbent must be “packed” into the column so that there are no irregularities such as bubbles or cracks.
		If the adsorbent if impregnated with a fluorescent dye, then the bands can be followed with an UV lamp.
	www.ipfw.edu /chem/265/265Fall02/265nt02h.htm (1116 words)

	Problem Statement (Site not responding. Last check: 2007-11-05)
		As the air flows through the adsorbent bed, water and carbon dioxide are absorbed by the granular material, and the air leaves the vessel free of water and carbon dioxide.
		When the adsorbent bed has been cleaned sufficiently, the regeneration gas is no longer heated, but continues to flow until the adsorbent bed is cooled-down to normal operating temperature.
		It must be designed to support the weight of the adsorbent bed and any forces due to pressure drop across the bed, to allow gas to flow through it, and to contain the granular adsorbent particles (typically about 2mm dia.).
	www.personal.psu.edu /jfd129/overview.htm (518 words)

	Solid Adsorbent Dehydration Systems - NATCO
		Typically, the loaded adsorbent bed is regenerated by heating a portion of the mainstream in a salt bath or direct fired heater and passing it through the bed.
		After the adsorbent bed cools, the tower is ready for gas or liquid conditioning.
		Adsorbent system specifications are computer analyzed to determine the proper combination of features.
	www.natcogroup.com /Content.asp?t=ProductPage&ProductID=20 (765 words)

	Industrial Gases and Air Separation Adsorbents (Site not responding. Last check: 2007-11-05)
		High purity hydrogen and CO can be produced cryogenically with MOLSIV adsorbents serving as an integral part of the process.
		In a typical process, air at ambient pressure is fed to a bed of MOLSIV adsorbent.
		HP adsorbent is the product of choice for water and CO adsorption in vacuum swing processes and is used in combination with VSA-10 adsorbent.
	www.uop.com /adsorbents/7090.html (582 words)

	Dynamic Adsorbents, LLC Catalog: Chromatography, alumina, silica gels, sorbents
		DCC is simple and economical because the adsorbent is filled into nylon tubing (other types of columns such as glass etc. may also be used).
		Forces which contribute to the separation involve hydrogen bonding between the nitro groups, the phenolic protons, the carboxyl groups etc. of the sample and the free amino groups of the adsorbent.
		Florisil PR is a new selective adsorbent, specially processed to give consistent results when used for column cleanup and separation of chlorinated pesticide residue prior to identification and measurement of the pesticide by gas, thin layer or paper chromatography.
	www.dynamicadsorbents.com /preplc3.htm (480 words)

	Roy F. Weston, Inc. (Ambersorb® 563 Adsorbent) (Site not responding. Last check: 2007-11-05)
		Ambersorb® 563 adsorbent can be regenerated on site using steam, thus eliminating the liability and cost of off-site regeneration or disposal associated with GAC treatment.
		Because Ambersorb® 563 adsorbent has a much higher capacity than GAC for volatile organics (at low concentrations), the process can operate for significantly longer service cycle times before regeneration is required.
		Ambersorb® 563 adsorbent is not prone to bacterial fouling.
	www.clu-in.org /PRODUCTS/SITE/complete/weston.htm (391 words)

	Filter Product Descriptions
		The adsorbent element is specially formulated to control humidity, and to adsorb acid gases and hydrocarbons from internal and external sources.
		The adsorbent is specially formulated to control humidity and to adsorb acid gases and hydrocarbons from internal and external sources.
		The adsorbent element is specially formulated to adsorb acid gases and hydrocarbons.
	www.donaldson.com /en/diskdrive/filters/index.html (448 words)

	AMBERLITE XAD Adsorbent Resins
		Polymeric adsorbents are highly porous structures whose internal surfaces can adsorb and then desorb a wide variety of different species depending on the environment in which they are used.
		For example, in polar solvents such as water, polymeric adsorbents exhibit non-polar or hydrophobic behaviour and so can adsorb organic species that are sparingly soluble.
		This polarity is most pronounced with the acrylic adsorbents and the phenolic adsorbents.
	www.advancedbiosciences.com /xad.htm (148 words)

	REMOVAL OF THE DYE, AMARANTH FROM WASTE WATER USING HEN FEATHERS AS POTENTIAL ADSORBENT (Site not responding. Last check: 2007-11-05)
		It is therefore decided to try to another waste material, hen feathers as adsorbent and present paper is an attempt to develop a versatile, economic and reliable method for the removal of toxic dye, Amaranth from waste water.
		Hence, exploring the use of Hen Feathers as a potential adsorbent for the efficient and economic removal of Amaranth from waste water and carrying out a detailed and systematic isothermic and kinetic study of the adsorption of Amaranth is a noble approach to decide the necessitous utilization of such a waste material.
		The effect of amount of adsorbent on the uptake of the dye was also observed and it was found that in general by increasing the amount of the adsorbent the adsorption increases.
	ejeafche.uvigo.es /5(2)2006/006522006F.htm (2455 words)

	Crown Iron
		The oil and adsorbent mixture enters the Pre-filtration Dryer where the moisture in the oil and adsorbent is evaporated.
		The dry oil and adsorbent mixture is filtered in one of the three Adsorbent Filters removing the spent adsorbent.
		The system includes three filters of which two are on line (one for adsorbent and pre-bleaching, the other for bleaching earth) while the third is being cleaned and prepared for the next cycle.
	www.europacrown.com /technologies/ref_bleaching.cfm (459 words)

	SAND AS ADSORBENT FOR REMOVAL OF ZINC FROM INDUSTRIAL EFFLUENTS (Site not responding. Last check: 2007-11-05)
		Adsorption technique is one of the most technologies being used for treatment of polluted water, but seeking for the low cost adsorbent is the objective of this study.
		Sand was used as adsorbent for adsorption of Cu (II).
		An atomic absorption spectrophotometer was used to determine the concentrations of heavy metals absorbed by the adsorbents.
	ejeafche.uvigo.es /3(6)2004/004362004F.htm (2351 words)

	User's Guide to HbgcJava - A GUI for HydroBioGeoChem123D 1.1
		In case of the constant capacitance model, the number of adsorbent components has to be twice the number of adsorbing sites.
		In case of the triple layer model, the number of adsorbent components has to be three times the number of adsorbing sites.
		Therefore, the number of adsorbent components has to be a multiple of 3.
	hbgc.esd.ornl.gov /docs/HbgcJava/paneads.html (379 words)

	Pure Air Filtration Contact Information
		Pure Air's adsorbent media are especially effective at removing odors common to waste water treatment facilities.
		The only way to truly purify the air in your home is to use Pure Air’s gas adsorbent technology, HEPA dust filtration, and UV light to kill microbes.
		Pure Air provides a line of gas adsorbent filters which can be used in place of normal particulate filters.
	www.pureairfiltration.com /contact_us.htm (763 words)

	Regeneration of adsorbents (Site not responding. Last check: 2007-11-05)
		(b) diluting the resulting slurry of the adsorbent in the alkaline solution with recycled overflow liquid from one or both of the subsequent separation steps, to thereby reduce the concentration of adsorbent in the slurry to at least the level where unhindered settling can occur;
		A process as claimed in claim 1 or claim 2, wherein the adsorbent is magnetite.
		A process as claimed in claim 3, wherein the concentration of the magnetite slurry after dilution in step (b) is less than about 10% by weight.
	www.well.com /~youlee/automatic_labeling_system/regeneration_adsorbents.html (674 words)

	PSA Technology Hits the Fast Lane (Site not responding. Last check: 2007-11-05)
		The technology, first developed by ExxonMobil and Air Liquide in the late 1950s, is based upon the capacity of adsorbents to selectively adsorb and desorb particular gases as gas pressure is raised and lowered.
		Fluidization: Gas flow through the adsorbent beds, and, by association, the PSA cycle speed, are limited by the fluidization velocity of the adsorbent beads.
		High adsorbent inventories and slow cycle speeds are required to compensate for this.
	www.chemicalprocessing.com /articles/2003/322.html (904 words)

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