编辑“︁氮”︁（章节）

==生产==
氮气是[[工业气体]]，通过[[分馏]]{{le|液态空气|liquid air}}或是{{le|变压吸附法|pressure swing adsorption}}（PSA）生产。使用变压吸附法的氮气生成器的价格和能耗都比瓶装氮气低。<ref>{{Cite web|url=http://www.parkern2.com/_literature_176619/A_Sustainable_Approach_to_the_Supply_of_Nitrogen|title=A Sustainable Approach to the Supply of Nitrogen|last=Froehlich|first=Peter|date=May 2013|website=www.parker.com|publisher=Parker Hannifin Corporation|access-date=24 November 2016|archive-date=16 March 2016|archive-url=https://web.archive.org/web/20160316190914/http://www.parkern2.com/_literature_176619/A_Sustainable_Approach_to_the_Supply_of_Nitrogen|url-status=live}}</ref>商品级氮气通常是提取空气中的[[氧气]]后的副产物。这些氮气被压缩后都用黑色钢瓶装，常被称为OFN（无氧氮气），<ref>{{Cite journal|doi= 10.1021/ie50569a032|title=Nitrogen Purfication. Pilot Plant Removal of Oxygen|year=1957|journal=Industrial & Engineering Chemistry|volume= 49|pages= 869–73|issue= 5|last1= Reich|first1= Murray|last2= Kapenekas|first2= Harry}}</ref>含有的氧气杂质至多为20&nbsp;ppm。{{sfn|Greenwood|Earnshaw|1997|pp=409–11}}

在实验室里，氮气可由[[氯化铵]]溶液和[[亚硝酸钠]]反应而成。<ref name="labProduction">{{Cite journal| last1 = Bartlett |first1 = J. K.| title = Analysis for nitrite by evolution of nitrogen: A general chemistry laboratory experiment | url = https://archive.org/details/sim_journal-of-chemical-education_1967-08_44_8/page/475 | doi = 10.1021/ed044p475 | journal = Journal of Chemical Education | volume = 44 | issue = 8 | page = 475 | year = 1967 | bibcode = 1967JChEd..44..475B}}</ref>
:NH<sub>4</sub>Cl + NaNO<sub>2</sub> → N<sub>2</sub> + NaCl + 2 H<sub>2</sub>O

反应中会产生少量的NO和HNO<sub>3</sub>杂质，可通过把气体通入含[[重铬酸钾]]的硫酸去除。<ref name="labProduction" />极纯的氮气则能通过[[叠氮化钡]]或[[叠氮化钠]]热分解而成。<ref>{{Cite journal | last1 = Eremets | first1 = M. I. | last2 = Popov | first2 = M. Y. | last3 = Trojan | first3 = I. A. | last4 = Denisov | first4 = V. N. | last5 = Boehler | first5 = R. | last6 = Hemley | first6 = R. J. | doi = 10.1063/1.1718250 | title = Polymerization of nitrogen in sodium azide | journal = The Journal of Chemical Physics | volume = 120 | issue = 22 | pages = 10618–23 | year = 2004 | pmid = 15268087|bibcode = 2004JChPh.12010618E }}</ref>
:2 NaN<sub>3</sub> → 2 Na + 3 N<sub>2</sub>