Air Products and Chemicals, Inc.

Garret C Lau

Jeffrey Raymond Hufton

Timothy Christopher Golden

Gamini Ananda Vedage

Gauri Sankar Lal

Kristen Elaine Minnich

Mohammad Ali Kalbassi

Declan Patrick O'Connor

Christopher James Raiswell

Pritesh G Patel

Shubhra Jyoti Bhadra

Aaron Raymond Scott

Daniel Patrick Zwilling

Maulik R Shelat

Timothy C Golden

Kamlesh Ghodasara

Christine Waweru

Christopher Suggitt

Venkataramanan Ravi

Jr William J Casteel

Gaurav Kumar

A hydrogen feed stream comprising one or more impurities selected from the group consisting of nitrogen, argon, methane, carbon monoxide, carbon dioxide, oxygen, and water, is purified using a cryogenic temperature swing adsorption (CTSA) process with high overall recovery of hydrogen. The waste gas from regenerating the CTSA may be used to improve the performance of upstream hydrogen processing steps.

Method for producing high purity hydrogen

A process for recovering at least one fluid (e.g. xenon gas and/or krypton gas, etc.) from a feed gas can include utilization of a compression system, primary heat exchanger unit, a pre-purification unit (PPU), and other units to separate and recover at least one desired fluid. In some embodiments, fluid flows output from a first heat exchanger or separation system of the plant can be split so that a portion of a stream is output for downstream processing to purify xenon (Xe) and/or krypton (Kr) product flow(s) while another portion of the stream is recycled to a compression system or the PPU to undergo further purification and heat exchange so that the product output for downstream processing has a higher concentration of Xe or Kr. Some embodiments can be configured to provide an improved recovery of Xe and/or Kr as well as an improvement in operational efficiency.

Fluid recovery process and apparatus for xenon and or krypton recovery

A liquid methylenedianiline product is disclosed. The product is produced by reacting aniline and ethylaniline with formaldehyde with an amine to formaldehyde ratio greater than about 2:1. The resulting reaction product is a liquid mixture of methylenedianiline, monoethyl methylenedianiline, and diethyl methylenedianiline having a viscosity of less than about 1000 cps at 40&#xb0; C.

Liquid methylenedianiline compositions

Hydrogen and carbon monoxide impurities are removed from a dry gas comprising the impurities, wherein the dry gas is at least substantially free of carbon dioxide, by passing the dry gas with sufficient residence time, e.g. at least 1.5 s, through a layer of catalyst comprising a mixture of manganese oxide and copper oxide. The use of expensive noble metal catalysts to remove hydrogen may thereby be avoided. In addition, regeneration of the catalyst using oxygen-containing regeneration gas does not reduce the effectiveness of the catalyst.

Removal of hydrogen and carbon monoxide impurities from gas streams

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Emmaus, PA, United States of America

Garret C Lau