Hai Du is an accomplished inventor based in East Amherst, NY (US). He holds a total of 8 patents that showcase his expertise in the field of cryogenic processes and gas recovery. His innovative work has significantly contributed to advancements in xenon recovery technologies.

Latest Patents

One of Hai Du's latest patents is the "Adsorptive xenon recovery process from a gas or liquid stream at cryogenic temperature." This invention relates to an adsorption process for xenon recovery from a cryogenic liquid or gas stream. The process involves contacting a bed of adsorbent with a xenon-containing liquid or gas stream, selectively adsorbing the xenon from the stream. The adsorption bed is operated to near full breakthrough with xenon, allowing for a deep rejection of other stream components before regeneration using the temperature swing method. After the stripping step, the xenon adsorbent bed is drained to clear out the liquid residue left in the nonselective void space, and the xenon molecules in those void spaces are recycled upstream to the ASU distillation column to increase xenon recovery. The process also includes purging the adsorbent bed with oxygen, followed by purging with gaseous argon at cryogenic temperatures to displace the co-adsorbed oxygen. This innovative method enables the production of a high purity product of at least 40 vol % xenon from the adsorption bed.

Another significant patent is the "Cryogenic adsorption process for xenon recovery." This process describes an adsorption method for xenon recovery from a cryogenic liquid or gas stream. Similar to his previous patent, it involves operating the adsorption bed to near full breakthrough with xenon before regeneration. This method allows for the safe use of oxygen as a purge gas, even in the presence of hydrocarbons in the feed stream.

Career Highlights

Hai Du is currently employed at Praxair Technology, Inc., where he continues to develop innovative solutions in gas recovery technologies. His work has been instrumental in enhancing the efficiency and purity of xenon recovery processes.

Collaborations

Throughout his career, Hai Du has collaborated with notable colleagues, including Neil Andrew Stephenson and Neil Mark Prosser. These collaborations have further enriched his research and development efforts in the field.

Conclusion

Hai Du's contributions to the field of

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