Westvaco Corporation

Other

Texaco Inc.

Applied Ceramics, Inc.

Robert K Beckler

Frederick Stanley Baker

James R Miller

John C McCue

Frank R Rhodes

Minwoo Park

Jack H L'Amoreaux

Zhiquan Q Yan

Chakka Sudhakar

Mahendra S Patel

Robert C Flowe

David E Sauriol

Jane F Byrne

An adsorptive monolith made by extruding a mixture of activated carbon, a ceramic forming material, a flux material, and water, drying the extruded monolith, and firing the dried monolith at a temperature and for a time period sufficient to react the ceramic material together and form a ceramic matrix. The extrudable mixture may also comprise a wet binder. The monolith has a shape with at least one passage therethrough and desirably has a plurality of passages therethrough to form a honeycomb. The monolith may be dried by vacuum drying, freeze drying, or control humidity drying. The monolith is useful for removing volatile organic compounds and other chemical agents such as ozone from fluid streams. Particularly useful applications include adsorptive filters for removing ozone from xerographic devices and other appropriate office machines and volatile organic compounds from automobile engine air intake systems.

Adsorptive monolith including activated carbon, method for making said monolith, and method for adsorbing chemical agents from fluid streams

Disclosed is a method for preparing a phosphorus treated activated carbon composition suitable for use as a catalyst support, a catalyst, and an adsorbent. The invention method involves treating (e., mixing or impregnating) an activated carbon material having a surface area greater than 100 m,/g with a phosphorus-containing compound, drying, and heating to a temperature of from 450&deg; C. to about 1200&deg; C., wherein the resulting composition is characterized by a phosphorus compound combined with the carbon in an amount of from above 2.5% to about 10% phosphorus, based on the weight of the composition.

Preparation of phosphorus-treated activated carbon composition

A process for further chemical activation of activated carbon is disclosed comprising activation of an active carbon precursor material with a potassium hydroxide solution, pre-drying the blend to 5% to 15% moisture content, activating this blend at from about 650.degree. to about 1100.degree. C., and acid washing and drying the microporous activated carbon product, which is characterized by greater than 50% of its total pore volume comprising pores of from about 8.ANG. to 20.ANG. in width and greater than 70% of its total pore volume comprising pores of less than 20.ANG. in width and greater than 95% of its total pore volume comprising pores of less than 50.ANG. in width.

Highly microporous carbons and process of manufacture

Adsorptive monolith including activated carbon and method for making

Extruded pellets comprising a majority of activated carbon particles and an inorganic binder are disclosed to provide improved performance when processed through tumbling equipment while the pellets are in their 'green' state (i.e., pellets which are fresh off the extruder and contain activated carbon), binder material, and water and have not been subjected to any thermal processing (drying or calcining). The tumbling action both smooths and densifies (i.e., reduces interparticle voids within) the pellet, thereby closing any cracks and greatly improving appearance. Improved performance results from an ability to increase the weight of carbon pellets which can be packed into a fixed volume and thereby increase the volumetric working capacity of the bed for adsorbing/desorbing vapors. Another benefit is to greatly reduce the levels of dust associated with the carbon, both the initial dust and the dust attrition.

Shaped lignocellulosic-based activated carbon

Disclosed is a phosphorus treated activated carbon composition suitable for use as catalyst support, catalyst, and an adsorbent, which is produced by treating (e.g., by mixing or impregnating) an activated carbon material having a surface area greater than 100 m.sup.2 /g with a phosphorus-containing compound, drying, and heating to a temperature of from 450.degree. C. to about 1200.degree. C., wherein the resulting composition is characterized by a phosphorus compound combined with the carbon in the amount of from above 2.5% to about 10% phosphorus, based on the weight of the composition.

Phosphorus-treated activated carbon composition

Growing community of inventors

Lexington, VA, United States of America

Robert K Beckler