Editing Inert gas (section)

==Need and necessity==
The inert gases are obtained by [[air separation|fractional distillation of air]], with the exception of [[helium]] which is separated from a few [[natural gas]] sources rich in this element,<ref>{{Cite web|url=http://www.qatargas.com/english/operations/ras-laffan-helium|title=Qatargas - Operations|website=www.qatargas.com|language=en-US|access-date=2018-08-31|archive-date=2020-04-28|archive-url=https://web.archive.org/web/20200428183424/http://www.qatargas.com/english/operations/ras-laffan-helium|url-status=dead}}</ref> through cryogenic distillation or membrane separation.<ref>{{Cite web|url=https://www.sepuran.com/product/sepuran/en/Helium/|title=SEPURAN® Noble for helium recovery - SEPURAN® - Efficient gas separation|website=www.sepuran.com|language=en-US|access-date=2018-08-31|archive-date=2020-08-06|archive-url=https://web.archive.org/web/20200806181905/https://www.sepuran.com/product/sepuran/en/helium/|url-status=dead}}</ref> For specialized applications, purified inert gas shall be produced by specialized generators on-site. They are often used by chemical tankers and product carriers (smaller vessels). Benchtop specialized generators are also available for laboratories.