N-hexane tsarin samarwa
Yawancin samar da hexane na kasashen waje suna amfani da hanyoyin tallan siye na kwayoyin halitta, irin su Richfielcd (Richfield) da Watson (Watson) a cikin Amurka, ta amfani da raffinate da aka sake ginawa azaman albarkatun ƙasa, ta hanyar sake yin amfani da gadaje biyu ko fiye don tallatawa. Latsa desorption don samar da n-hexane.
Yawancin masana'antun hexane na gida suna amfani da tsarin distillation na hydrogenation, wanda ya kasu kashi biyu:

Na farko, hydrogenation sannan gyara.

Har ila yau, aka sani da pre-hydrogenation, da albarkatun kasa ne mai tsanani da zafi musayar, kai dauki zazzabi, shiga cikin hydrogenation reactor, desulfurization da dearomatization dauki a karkashin mataki na kara kuzari, da sauran ƙarfi man fetur da hydrogen cakuda shiga cikin tanki na rabuwa don rabuwa. , hydrogen farfadowa da na'ura, kaushi mai a cikin fractionation hasumiya Yanke cikin gama kayayyakin. Gabaɗaya magana, bayan hydrogenation na albarkatun ƙasa, har yanzu yana raguwa kuma a yanka shi zuwa n-hexane, da sauran nau'ikan sauran nau'ikan mai. Amfanin shi ne cewa duk albarkatun ƙasa suna dearomatized kuma sun ƙare, suna yin cikakken amfani da kowane samfurin. Rashin hasara shine cewa zuba jari yana da yawa kuma yawan amfani da kayan yana da yawa.

Na biyu, gyara sai hydrogenation.

Har ila yau ake magana a kai a matsayin post-hydrogenation, a cikin yanayin n-hexane, an fara yanke albarkatun kasa a cikin danyen hexane na 66-69 distillation range, da tsarki na danyen hexane yana inganta sosai, kuma tun lokacin da ƙungiyar phenyl ta kasance. wanda ke kunshe a cikin n-hexane, hexane a cikin danyen hexane Hakanan abun ciki yana karuwa sosai, sa'an nan kuma an sanya shi da hydrodebenzene desulfurization don samar da n-hexane mai inganci. Amfanin shi ne cewa zuba jari yana da ƙananan kuma yawan amfani da kayan yana da ƙananan. Rashin hasara shi ne cewa ba a amfani da ɓangaren da ba shi da ruwa yadda ya kamata.