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AssigneePraxair Technology, Inc.
InventorsPhilip Alexander Barrett, Steven John Pontonio, Persefoni Kechagia, Neil Andrew Stephenson, Kerry C. Weston
Estimating the term…
Adsorbent compositions useful in adsorption and separation processes are made using silicone-derived binding agents. The adsorbent compositions are made from crystallite aluminosilicate particles bound with silicone-derived binding agents, and optionally small amounts of a clay binder, to form agglomerated crystallite particles and are calcined to volatilize the organic components associated with the silicone-derived binding agents. The agglomerated crystallite particles have superior pore structures and superior crush strengths at low binder concentrations and exhibit enhanced N2 adsorption rates and capacities when used in air separation processes.
A heat treated adsorbent composition comprising a mixture of at least one active material and a silicone-derived binding agent formed as agglomerated particles comprised of 90% or more of the at least one active material calculated on a dry weight final product basis and having:
An adsorption process for separating N2 from a gas mixture containing N2 and at least one less strongly adsorbable component comprising contacting the mixture with an adsorbent composition which selectively adsorbs the N2 and the at least one less strongly adsorbable component is recovered as product;
An adsorbent composition useful in gas adsorption and separation processes, comprising one or more aluminosilicate crystallite particles having an average particle size of greater than 1 micron and having a SiO2/Al2O3 ratio of less than 2.5 and made by a method comprising mixing the particles in an aqueous solution containing 10% or less of a silicone binder precursor and a clay binder in concentrations of not more than 1 part clay binder to 5 parts silicone-derived binding agent to form a mixture, agglomerating the mixture to form agglomerated crystallite particles and calcining the mixture at temperatures from above 400° C. to 700° C. for a period sufficient to substantially remove all volatile organic components associated with the silicone binder precursor.
An adsorbent composition comprising agglomerated crystallite zeolite particles bound with a silicone-derived binding agent and a clay binder in concentration of not more than 1 part clay binder to 5 parts silicone binding agent, the crystallite zeolite particles comprising one or more type X zeolite having a SiO2/Al2O3 ratio of less than or equal to 2.5 and wherein the composition has substantially no visible silicone-derived binding agent in the pores of the agglomerated particles when viewed under a SEM at 4500× magnification.
A method for manufacturing an agglomerated adsorbent composition comprising:
Dependencies are inferred from the claim text.