Adsorbent composition for argon purification,申请号US201313782682-传众专利搜索

Adsorbent composition for argon purification

申请公布号：US9457337(B2)

申请号：US201313782682

申请日期：2013.03.01

申请公布日期：2016.10.04

申请人：

PRAXAIR TECHNOLOGY, INC.

发明人：Barrett Philip A.;Pontonio Steven J.;Stephenson Neil A.;Kechagia Persefoni E.

分类号：B01J20/18;C01B23/00

主分类号：B01J20/18

代理机构：

Praxair, Inc.

代理人：Praxair, Inc.

地址：Danbury CT US

摘要：An optimal material composition that allows for the purification of at least one feed component from a fluid feed stream such that the adsorbent has an oxygen capacity of at least 10 weight percent is described. More specifically, the material is an adsorbent for purification of a fluid feed stream having an oxygen to argon selectivity greater than or equal to a ratio of 3:1 and an oxygen capacity of greater than or equal to 10 weight percent, wherein the oxygen capacity is measured at a pressure in the range of about 9-10 Torr and a temperature of 77 degrees Kelvin after 4 hours of equilibration time and wherein the oxygen to argon selectivity is obtained by dividing the oxygen capacity by the argon capacity of the adsorbent measured at a pressure in the range of about 697-700 Torr and a temperature of 87 degrees Kelvin after 8 hours of equilibration time. The adsorption capacities are measured on a pure component basis.

主权项：1. A material for purification of a fluid feed stream comprising a zeolite adsorbent having a silica to alumina ratio of less than or equal to 4:1, and partially ion exchanged with either a first low range or second high range of lithium charged balancing cations and/or a mixture of the two wherein said zeolite has pores defined by ring structures comprising at most 10 tetrahedrally coordinated atoms of the silicon and/or aluminum types having an oxygen to argon selectivity greater than or equal to a ratio of 3:1 and an oxygen capacity of greater than or equal to 10 weight percent, wherein said oxygen capacity is measured at a pressure in the range of about of about 9-10 Torr and a temperature of 77 degrees Kelvin after 4 hours of equilibration time and wherein said oxygen to argon selectivity is obtained by dividing said oxygen capacity by said argon capacity of said adsorbent measured at a pressure in a range of about 697-700 Torr and a temperature of 87 degrees Kelvin after 8 hours of equilibration time.