Praxair Technology, Inc.

Katie Held

Neil Andrew Stephenson

Philip Alexander Barrett

Steven John Pontonio

Kihyung Kim

Werner Leitmayr

Garrett R Swindlehurst

Luke J Coleman

The present invention relates to a surface modified zeolite adsorbent wherein the surface of said zeolite is modified with a coating comprised of a silicone derived species, said zeolite having a mean crystal size from about 5 to about 10 μm and a skeletal density of ≥1.10 gr./cc. The invention is based on the discovery that larger crystals tend to have higher particle density, and the packing of the larger crystals in agglomeration processes leads to more idealized packing to provide a larger mean-pore diameter. The surface modified adsorbent provides rate selectivity for one gas over others is described. The superior adsorbent has the added convenience of bead forming simultaneously with pore modification as well as having the treatment result in the yielding of high crush strength products.

Large crystal tunable adsorbents

The process of the present invention provides high recovery and low capital cost giving it an economic advantage over previously known purification processes. The present process has particular applicability to the purification of synthesis gases comprising at least hydrogen (H), carbon monoxide (CO), methane (CH), CO, and HO to obtain a gas stream including at least H, CO, and CH, that is substantially free of HO and CO. The process also has applicability to the purification of natural gases inclusive of at least CH, N, CO, and HO to produce a gas stream including at least CHand N, but which is substantially free of HO and CO.

High recovery process for purification of multicomponent gases

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Hamburg, NY, United States of America

Katie Held