Helium Extraction from Natural Gas
Number of patents in Portfolio can not be more than 2000
United States of America
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Issued Date -
Mar 19, 2020
app pub date -
Sep 13, 2018
filing date -
Sep 13, 2018
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Abstract
A helium-containing stream is recovered from a natural gas feed using a membrane followed by multiple distillation steps. Refrigeration is provided by expanding a bottoms liquid with a higher nitrogen content than the feed, achieving a lower temperature in the process. The helium-enriched vapor is then purified and the helium-containing waste stream is recycled to maximize recovery and reduce the number of compressors needed. The helium-depleted natural gas stream can be returned at pressure for utilization or transportation.
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