Uop Lcc

Boc Gases Austrailia Ltd.

Rustam H Sethna

Stephen R Dunne

Peter K Coughlin

Vladislav Ivanov Kanazirev

Jayant Kumar Gorawara

Henry Rastelli

Daniel L Ellig

Alan P Cohen

Kirit M Patel

David William Clark

Michael Whysall

Jason Simon Tullai

Billy Kim Fung Chan

Peter L Fleming

The invention comprises a temperature swing adsorption system for providing dry air to an air brake system. More particularly, there is provided a desiccant wheel upstream of the air compressor to dry air prior to its compression.

Brake air drying using low pressure desiccant wheel

Using a high pressure rotary adsorbent wheel, a high value compressed gas feed can be purified by concentrating the impurity such as water, condensing it out, before final purification. Instead of exhausting gas from the system, the effluent can be put back into the feed at a point prior to condensation of the high value gas feed, and therefore the entire feed is purified without any high value gas feed going into a waste stream.

Adsorption process for continuous purification of high value gas feeds

A process for removal of trace impurities of hydrides of arsenic, phosphorus, antimony, silicon, and boron and sulfur and oxygenates and compounds containing these impurities from a hydrocarbon stream comprising contacting the hydrocarbon stream with an adsorbent material selected from the group consisting of zeolites and promoted alumina to adsorb compounds containing sulfur and/or oxygenates, contacting the hydrocarbon stream with an adsorbent material comprising one or more active metal oxides to remove the hydrides and contacting the hydrocarbon stream with an adsorbent material that removes water.

Adsorbent beds for removal of hydrides from hydrocarbons

The present invention relates to a pressure swing adsorption process for direct reduction of iron wherein a portion of spent reducing gas withdrawn from the direct reduction reactor is subjected to a PSA process for the removal of carbon dioxide from the spent reducing gas. An improved CO -rejection method using an external natural gas purge stream after depressurization and before the product purge step is described. The PSA process comprises an external purge step with a non-absorbable gas, which surprisingly reduces the adsorbent regeneration requirements to maintain the selective adsorption of carbon dioxide from the spent reducing gas. The external natural gas purge results in a cleaner bed before the start of each adsorption cycle. Consequently, significantly more CO can be rejected and/or higher hydrogen and CO recoveries can be attained. The external purge stream is fully integrated into the DDRI production scheme.

Process for removal of carbon dioxide for use in producing direct reduced iron

A method for optimising a mineral recovery process. A slurry is fed to a conditioning step . The condition slurry is then provided to a flotation circuit to recover a concentrate . The remainder of the slurry is then rejected as tail or passed for further processing. The present invention provides apparatus for analysing a sample stream of the slurry. A sample stream is provided to an analysis device which treats the sample with an oxidising gas similar to the oxidative treatment . Several parameters are measured before and/or after the oxidative treatment of the slurry. The flotability characteristic of the slurry is then determined as a function of the measured parameter(s). The result is used to optimise mineral recovery. This apparatus can be used intermittently or continuously to provide on-going optimisation of the mineral recovery circuit.

Method for optimizing flotation recovery

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Palatine, IL, United States of America

Rustam H Sethna