Title: Closed end regeneration method

Abstract

A nanoporous reactive adsorbent incorporates a relatively small number of relatively larger reactant, e.g. metal, enzyme, etc. particles (10) forming a discontinuous or continuous phase interspersed among and surrounded by a continuous phase of smaller adsorbent particles (12) and connected interstitial pores (14) therebetween. The reactive adsorbent can effectively remove inorganic or organic impurities in a liquid by causing the liquid to flow through the adsorbent. For example, silver ions may be adsorbed by the adsorbent particles (12) and reduced to metallic silver by reducing metal, such as irons, as the reactant particles (10). The column can be regenerated by backwashing with the liquid effluent containing, for example, acetic acid.

Inventors:

Yang, Arthur Jing-Min; Zhang, Yuehua

Issue Date:

Tue Jun 27 00:00:00 EDT 2006

Research Org.:

Industrial Science & Technology Network Inc., York, PA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1175804

Patent Number(s):

7067062

Application Number:

10/993,352

Assignee:

Industrial Science & Technology Network Inc. (York, PA)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D15/00 - Separating processes involving the treatment of liquids with solid sorbents

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J20/0229 - {Compounds of Fe}
B01J20/0244 - {Compounds of Zn}
B01J20/0248 - {Compounds of B, Al, Ga, In, Tl
B01J20/04 - comprising compounds of alkali metals, alkaline earth metals or magnesium
B01J20/06 - comprising oxides or hydroxides of metals not provided for in group B01J20/04
B01J20/10 - comprising silica or silicate
B01J20/103 - {comprising silica}
B01J20/28004 - {Sorbent size or size distribution, e.g. particle size}
B01J20/28016 - {Particle form}
B01J20/28026 - {Particles within, immobilised, dispersed, entrapped in or on a matrix, e.g. a resin}
B01J20/28078 - {Pore diameter}
B01J20/2808 - {being less than 2 nm, i.e. micropores or nanopores}
B01J20/28083 - {being in the range 2-50 nm, i.e. mesopores}
B01J20/28097 - {being coated, filled or plugged with specific compounds}
B01J20/3071 - {Washing or leaching}
B01J20/3236 - {containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts}
B01J20/3242 - {Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group}
B01J20/3259 - {comprising at least two different types of heteroatoms selected from nitrogen, oxygen or sulfur with at least one silicon atom}
B01J20/3433 - {of sorbents or filter aids other than those covered by B01J20/3408 - B01J20/3425}
B01J20/345 - {using a particular desorbing compound or mixture
B01J2220/42 - Materials comprising a mixture of inorganic materials

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DOE Contract Number:  

FG02-97ER82409

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY